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Platinum graduated Diamond Tennis necklace 20 ct
Platinum graduated Diamond Tennis necklace 20 ct

Platinum graduated Diamond Tennis necklace 20 ct

Located in Zurich, Zollstrasse

A classic and stylish tennis necklace featuring 20 carats of diamonds! They are set in a straight line in strong durable platinum and lays perfectly flat on the neck-line.

Category

2010s Link Necklaces

Materials

Diamond, Platinum

20 Carat Art Deco Diamond Platinum Bracelet
20 Carat Art Deco Diamond Platinum Bracelet

20 Carat Art Deco Diamond Platinum Bracelet

Located in Chicago, IL

An elegant bracelet set with approximately 20.00 carats total weight of diamonds, designed with a bold and refined presence. The bracelet features a center section measuring 26 mm in...

Category

Vintage 1940s American Tennis Bracelets

Materials

Diamond, White Diamond, Platinum

.20 Carat Total Weight Diamond Platinum Wedding Band
.20 Carat Total Weight Diamond Platinum Wedding Band

.20 Carat Total Weight Diamond Platinum Wedding Band

Located in Hicksville, NY

Ring Size: 7.25 Metal Type: Platinum Weight: 2.4 grams Side Stone Details: Shape: Antique Single Cut Total Carat Weight: .20 carat, total weight Color: E Clarity: VS Finger to ...

Category

Vintage 1910s Unknown Art Deco Band Rings

Materials

White Diamond, Platinum

.20 Carat Total Weight Platinum Diamond Wedding Band
.20 Carat Total Weight Platinum Diamond Wedding Band

.20 Carat Total Weight Platinum Diamond Wedding Band

Located in Hicksville, NY

Item Details: Ring Size: 8.95 Metal Type: Platinum Weight: 2.1 grams Stone Details: Shape: Antique Single Cut Total Carat Weight: .20 Carat Total Weight Color: F Clarity: VS Eng...

Category

Vintage 1930s Unknown Art Deco Wedding Rings

Materials

White Diamond, Platinum

Platinum Choker Necklace Set With 20 ct. Diamonds
Platinum Choker Necklace Set With 20 ct. Diamonds

Platinum Choker Necklace Set With 20 ct. Diamonds

Located in Antwerp, BE

Fantastic and Gorgeous Platinum Choker Necklace With Bow Set With 20 ct. Diamonds Brilliant cut diamonds together approx. 19.74 ct.

Category

20th Century European Art Deco Choker Necklaces

Materials

Diamond, Platinum

20 Carat Princess Cut Diamond Tennis Bracelet in Platinum
20 Carat Princess Cut Diamond Tennis Bracelet in Platinum

20 Carat Princess Cut Diamond Tennis Bracelet in Platinum

By Antinori Fine Jewels

Located in Chicago, IL

Exuding unparalleled luxury and sophistication, this breathtaking tennis bracelet features approximately 20 carats of premium, natural princess-cut diamonds.

Category

2010s Italian Link Bracelets

Materials

Diamond, Platinum

AWARD WINING 20 Carat Ruby Diamond Platinum Ring
AWARD WINING 20 Carat Ruby Diamond Platinum Ring

AWARD WINING 20 Carat Ruby Diamond Platinum Ring

By Antinori Fine Jewels

Located in Chicago, IL

A truly important and exceptional gemstone ring centered by a 20 carat natural cushion-cut ruby of Madagascan origin, accompanied by a GRS Swisslab Platinum Award Appendix This extr...

Category

2010s American Contemporary Solitaire Rings

Materials

Diamond, White Diamond, Ruby, 18k Gold, Yellow Gold, Platinum

Platinum Aster Floral Diamond Ring '1/20 Carat'
Platinum Aster Floral Diamond Ring '1/20 Carat'

Platinum Aster Floral Diamond Ring '1/20 Carat'

Located in San Francisco, CA

This ring features six round brilliante diamonds sprong set into leaves that wrap around the finger. Experience the difference! Product details: Center Gemstone Color: WHITE Side ...

Category

21st Century and Contemporary American Band Rings

Materials

Diamond, Platinum

.20 Carat Total Weight Diamond Platinum Wedding Band
.20 Carat Total Weight Diamond Platinum Wedding Band

.20 Carat Total Weight Diamond Platinum Wedding Band

Located in Hicksville, NY

Ring Size: 5.5 Metal Type: Platinum [Hallmarked, and Tested] Weight: 2.0 grams Diamond Details: Weight: .20ct, total weight Cut: Old European brilliant Color:G-H Clarity: VS Finger...

Category

Vintage 1920s Unknown Art Deco Band Rings

Materials

Diamond, Platinum

20 Carat Old European Cut Diamond Platinum Tennis Necklace
20 Carat Old European Cut Diamond Platinum Tennis Necklace

20 Carat Old European Cut Diamond Platinum Tennis Necklace

Located in Chicago, IL

Elevate your jewelry collection with this exquisite tennis necklace, meticulously crafted to showcase the timeless brilliance of old European cut diamonds. This sophisticated piece f...

Category

Vintage 1940s British Chain Necklaces

Materials

Diamond, Platinum

Art Deco Platinum 20 Carat 1930's Diamond Bracelet
Art Deco Platinum 20 Carat 1930's Diamond Bracelet

Art Deco Platinum 20 Carat 1930's Diamond Bracelet

Located in New York, NY

This is a very special bracelet from the Art Deco era, crafted circa 1930's in platinum with diamonds. Mounted with over 400 diamonds of old cut round shapes and a few baguettes. Lo...

Category

20th Century Unknown Art Deco Bangles

Materials

Diamond, Platinum

Art Deco Platinum Diamond and Sapphire Bracelet, 20 Carats Total
Art Deco Platinum Diamond and Sapphire Bracelet, 20 Carats Total

Art Deco Platinum Diamond and Sapphire Bracelet, 20 Carats Total

Located in Chicago, IL

An elegant Art Deco platinum bracelet featuring approximately 14 carats of diamonds accented by approximately 6.00 carats of richly colored sapphires.

Category

Vintage 1940s French Beaded Bracelets

Materials

Diamond, Sapphire, Platinum

.20 Carat Diamond Platinum Engagement Ring and Wedding Band Set
.20 Carat Diamond Platinum Engagement Ring and Wedding Band Set

.20 Carat Diamond Platinum Engagement Ring and Wedding Band Set

Located in Hicksville, NY

Item Details: Ring Size: 7 Metal Type: Platinum Weight: 5.5 grams Center Diamond Details Shape: Old European Cut Brilliant Carat Weight: .20 carat Color: F Clarity: VS1 Side Ston...

Category

Vintage 1920s Unknown Art Deco Engagement Rings

Materials

White Diamond, Platinum

Tiffany & Co. Jean Schlumberger Diamond 20-Stone Platinum Hoop Earrings
Tiffany & Co. Jean Schlumberger Diamond 20-Stone Platinum Hoop Earrings

Tiffany & Co. Jean Schlumberger Diamond 20-Stone Platinum Hoop Earrings

By Jean Schlumberger for Tiffany & Co.

Located in Southampton, PA

Platinum 20-Stones Diamond Hoop Earrings designed by Jean Schlumberger for Tiffany & Co.

Category

21st Century and Contemporary American Hoop Earrings

Materials

Diamond, Platinum

.20 Carat Diamond Platinum Yellow Gold Dangle Drop Earrings
.20 Carat Diamond Platinum Yellow Gold Dangle Drop Earrings

.20 Carat Diamond Platinum Yellow Gold Dangle Drop Earrings

Located in Stamford, CT

Antique 1920's diamond dangle drop earrings handmade with platinum tops over 14k gold. Natural patina 2 round brilliant cut diamonds, I SI-I approx. .20cts 8 rose cut diamonds, appr...

Category

Early 20th Century Dangle Earrings

Materials

Diamond, Gold, 14k Gold, Yellow Gold, Platinum

20 Carat Diamond Platinum 18 Karat Yellow Gold Cuff Bracelet
20 Carat Diamond Platinum 18 Karat Yellow Gold Cuff Bracelet

20 Carat Diamond Platinum 18 Karat Yellow Gold Cuff Bracelet

Located in New York, NY

The approximate total diamond weight is 20 carats with a color of E-F and a clarity of VVS-VS.

Category

2010s Contemporary Cuff Bracelets

Materials

Diamond, 18k Gold, Yellow Gold, Platinum

Tiffany & Co .20 Carat Diamond Black Pearl Platinum Barbell Cufflinks
Tiffany & Co .20 Carat Diamond Black Pearl Platinum Barbell Cufflinks

Tiffany & Co .20 Carat Diamond Black Pearl Platinum Barbell Cufflinks

By Tiffany & Co.

Located in Stamford, CT

Black pearl and diamond Tiffany & Co. cufflinks. Theses cultured black pearl platinum barbell cufflinks are decorated with 10 round bezel set diamonds, totaling .20cts. on one end. ...

Category

21st Century and Contemporary Cufflinks

Materials

Diamond, Pearl, Black Pearl, Platinum

Platinum Emerald Diamond Tennis Bracelet '20 1/2 Ct .tw'
Platinum Emerald Diamond Tennis Bracelet '20 1/2 Ct .tw'

Platinum Emerald Diamond Tennis Bracelet '20 1/2 Ct .tw'

Located in San Francisco, CA

This timeless four prongs diamonds tennis bracelet feature 47 perfectly matched Emerald Shape Diamonds. Experience the Difference! Product details: Center Gemstone Type: NATURAL D...

Category

21st Century and Contemporary American More Bracelets

Materials

Diamond, Emerald, Platinum

.20 Carat Total Weight Art Deco Diamond Platinum Wedding Ring
.20 Carat Total Weight Art Deco Diamond Platinum Wedding Ring

.20 Carat Total Weight Art Deco Diamond Platinum Wedding Ring

Located in Hicksville, NY

Ring Size: 4.25 Metal Type: Platinum [Hallmarked, and Tested] Weight: 2.6 grams Diamond Details: Weight: .20ct, total weight Cut: Old European brilliant Color: G Clarity: VS Shank/...

Category

Vintage 1920s Unknown Art Deco Wedding Rings

Materials

Diamond, Platinum

.20 Carat Total Weight Art Deco Diamond Platinum Engagement Ring
.20 Carat Total Weight Art Deco Diamond Platinum Engagement Ring

.20 Carat Total Weight Art Deco Diamond Platinum Engagement Ring

Located in Hicksville, NY

Ring Size: 4.25 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3.20 grams Center Diamond Details: Weight: .20ct, total weight Cut: Old European brilliant Color: F-G Clarity: ...

Category

Vintage 1920s Unknown Art Deco Engagement Rings

Materials

Diamond, Platinum

Vintage Tiffany & Co. Pearl Strand Necklace Platinum 85% Clasp Diamond 14k 20"
Vintage Tiffany & Co. Pearl Strand Necklace Platinum 85% Clasp Diamond 14k 20"

Vintage Tiffany & Co. Pearl Strand Necklace Platinum 85% Clasp Diamond 14k 20"

By Tiffany & Co.

Located in Northbrook, IL

Here we have a stunning Tiffany & Co. pearl necklace with diamond accents in 14k gold and platinum. The female end of the clasp contains approximately 85% platinum, with the remainin...

Category

20th Century Pendant Necklaces

Materials

Diamond, Pearl, 14k Gold, Platinum

Platinum 20 Carat Baguette Cut Diamond Necklace F-G VVS-VS Quality
Platinum 20 Carat Baguette Cut Diamond Necklace F-G VVS-VS Quality

Platinum 20 Carat Baguette Cut Diamond Necklace F-G VVS-VS Quality

Located in Chicago, IL

An exceptional statement of refined elegance, this platinum diamond necklace showcases approximately 20 carats of meticulously selected diamonds, arranged in a seamless graduated des...

Category

21st Century and Contemporary American Contemporary Chain Necklaces

Materials

Diamond, Platinum

Platinum Earrings with Persian Turquoise (20 Ct), Emeralds (4.2 Ct) and Diamonds
Platinum Earrings with Persian Turquoise (20 Ct), Emeralds (4.2 Ct) and Diamonds

Platinum Earrings with Persian Turquoise (20 Ct), Emeralds (4.2 Ct) and Diamonds

Located in Miami, FL

A pair of elegant Mid-Century cocktail earrings, crafted in Italy circa 1960s–1970s, showcasing the striking beauty of Persian turquoise framed by vivid emeralds and accented with di...

Category

Mid-20th Century Modernist Stud Earrings

Materials

Diamond, Emerald, Turquoise, Platinum

French Art Deco 20 Carat Burma Ruby & Diamond Invisible Set Platinum Hinged Box
French Art Deco 20 Carat Burma Ruby & Diamond Invisible Set Platinum Hinged Box

French Art Deco 20 Carat Burma Ruby & Diamond Invisible Set Platinum Hinged Box

Located in Miami, FL

French Art Deco - Burma Ruby-princess cut-20ctw (invisible set) / DB-0.50ctw / 181 grams / 2.16x 3.31 inches This French Art Deco platinum hinged box features a central band of invi...

Category

Vintage 1930s Art Deco Boxes and Cases

Materials

Diamond, Ruby, Platinum

20 Carat Chandelier Dangling Art Deco Platinum Earrings
20 Carat Chandelier Dangling Art Deco Platinum Earrings

20 Carat Chandelier Dangling Art Deco Platinum Earrings

Located in New York, NY

Indulge in the timeless elegance of these exquisite estate diamond chandelier earrings, a true epitome of glamour and sophistication. Crafted in lustrous platinum, these captivating ...

Category

20th Century Unknown Modern Chandelier Earrings

Materials

Diamond, Platinum

20 Carat Blue Sapphire Ring
20 Carat Blue Sapphire Ring

20 Carat Blue Sapphire Ring

By Diamond Scene New York

Located in New York, NY

An INCREDIBLE Sapphire! 20.07 carat oval “Royal” Vivid Blue center Ceylon sapphire. 1.32 carat white side diamonds Currently a size 6.25, this ring can easily be resized. Se...

Category

21st Century and Contemporary Cocktail Rings

Materials

Blue Sapphire, Platinum

Edwardian Era 20 Carat Old Euro Cut Diamond Bracelet in Platinum Setting
Edwardian Era 20 Carat Old Euro Cut Diamond Bracelet in Platinum Setting

Edwardian Era 20 Carat Old Euro Cut Diamond Bracelet in Platinum Setting

Located in Miami, FL

A true investment piece of heirloom quality. Diamond Details: - Stone Count: 115 - Carat: 20 (approx.) - Color: F-G - Clarity: SI2 - Cut: Old European - Sizes: 2 diamonds - 0.70CT e...

Category

Early 20th Century Edwardian Link Bracelets

Materials

Diamond, Platinum

.20 Carat Total Weight Art Deco Diamond Platinum & 14 Karat Gold Engagement Ring
.20 Carat Total Weight Art Deco Diamond Platinum & 14 Karat Gold Engagement Ring

.20 Carat Total Weight Art Deco Diamond Platinum & 14 Karat Gold Engagement Ring

Located in Hicksville, NY

Item Details: Ring Size: 7.75 Metal Type: Platinum Top & 14 Karat Gold [Hallmarked, and Tested] Weight: . grams Diamond Details: Weight: .20 carat total weight Cut: Old European br...

Category

Vintage 1920s Unknown Art Deco Engagement Rings

Materials

Diamond, Gold, Platinum

.20 Carat Diamond Engagement Ring
.20 Carat Diamond Engagement Ring

.20 Carat Diamond Engagement Ring

Located in Hicksville, NY

Item Details: Ring Size: 7.5 Metal Type: Platinum Weight: 2.5 grams Center Diamond Details: Shape: Old European Brilliant Carat Weight: .20 carat Color: E Clarity: VS1 Finger to T...

Category

Vintage 1930s Unknown Art Deco Engagement Rings

Materials

White Diamond, Platinum

Rrp £20, 000 Tiffany & Co Platinum 1.40 Ct Diamond Solitaire Stud Earrings Pair
Rrp £20, 000 Tiffany & Co Platinum 1.40 Ct Diamond Solitaire Stud Earrings Pair

Rrp £20, 000 Tiffany & Co Platinum 1.40 Ct Diamond Solitaire Stud Earrings Pair

By Tiffany & Co.

Located in GB

Royal House Antiques Royal House Antiques is delighted to offer for sale this stunning pair of huge Tiffany & Co Platinum and 1.40ct Diamond Solitaire stud earrings RRP £20,000 An ...

Category

21st Century and Contemporary English Contemporary Stud Earrings

Materials

Diamond, Platinum

Platinum and 20 Carat Kunzite Ring. Diamond Ruby Accent Cocktail Ring 18K Gold
Platinum and 20 Carat Kunzite Ring. Diamond Ruby Accent Cocktail Ring 18K Gold

Platinum and 20 Carat Kunzite Ring. Diamond Ruby Accent Cocktail Ring 18K Gold

Located in New York, NY

Ring Size: 6.75 US, Resizable Metal: Platinum, Gold, Yellow Gold Stone: Diamond, Kunzite, Ruby Stone Cut: Emerald Cut Style: Art Deco Total Weight: 11.78 Grams This exquisite ring...

Category

21st Century and Contemporary Unknown Art Deco Cocktail Rings

Materials

Ruby, Kunzite, Diamond, 18k Gold, Platinum, Yellow Gold, Gold

Vintage Platinum Diamond Bracelet
Vintage Platinum Diamond Bracelet

Vintage Platinum Diamond Bracelet

$78,400Sale Price|20% Off

Vintage Platinum Diamond Bracelet

Located in Chicago, IL

Vintage Platinum Diamond Bracelet 20 Carats Exquisite vintage platinum bracelet set with an impressive combination of baguette-cut, old-cut, and 8-cut brilliant diamonds weighing a...

Category

Vintage 1940s British Tennis Bracelets

Materials

Diamond, White Diamond, Platinum

Platinum Asprey &Co 20 Ct Diamond Bracelet Estate to His Majesty Qaboos Bin Said
Platinum Asprey &Co 20 Ct Diamond Bracelet Estate to His Majesty Qaboos Bin Said

Platinum Asprey &Co 20 Ct Diamond Bracelet Estate to His Majesty Qaboos Bin Said

By Asprey London

Located in Antwerp, BE

Platinum Asprey & Co Diamond Bracelet specially made for the Queen of His Majesty Qaboos Bin Said,the sultan of Oman. A unique completely hand crafted diamond bracelet with exclusi...

Category

20th Century British Artisan Charm Bracelets

Materials

Diamond

.20 Carat Total Weight Diamond Wedding Band Ring
.20 Carat Total Weight Diamond Wedding Band Ring

.20 Carat Total Weight Diamond Wedding Band Ring

Located in Hicksville, NY

Ring Size: 7 Metal Type: Platinum [Hallmarked, and Tested] Weight: 2 grams Diamond Details: Weight: .20 carat, total weight Cut: Antique Single Cut Color: F Clarity: VS1 Finger t...

Category

Vintage 1920s Unknown Art Deco Band Rings

Materials

White Diamond, Platinum

GIA Certified 20 carat Emerald Cut Diamond Ring
GIA Certified 20 carat Emerald Cut Diamond Ring

GIA Certified 20 carat Emerald Cut Diamond Ring

Located in Chicago, IL

A truly majestic creation, this ring features a GIA Certified 20.46 carat Emerald Cut Diamond, measuring an impressive 19.82 x 13.98 x 8.10 mm. The diamond is graded J color and VS1 ...

Category

2010s American Engagement Rings

Materials

Diamond, White Diamond, Emerald, Platinum

Certified Significant Diamond Cluster Earrings 20 Carats D Colour
Certified Significant Diamond Cluster Earrings 20 Carats D Colour

Certified Significant Diamond Cluster Earrings 20 Carats D Colour

Located in Mayfair, London, London

A pair of decadent diamond cluster earrings in platinum. Each earring is composed of a cluster design encompassing a mixture of round brilliant cut, pear cut and marquise cut diamond...

Category

21st Century and Contemporary Chandelier Earrings

Materials

Diamond, Platinum

GIA Certified 20 Carat Emerald Cut Diamond Engagement Ring
GIA Certified 20 Carat Emerald Cut Diamond Engagement Ring

GIA Certified 20 Carat Emerald Cut Diamond Engagement Ring

By GEMME

Located in New York, NY

Wow! The Ultimate Emerald Cut Diamond Ring. GIA Certified as J color VS clarity. Set with shield cut side stones

Category

2010s Three-Stone Rings

Materials

Diamond, Platinum

20 carat mixed size round brilliant diamond chain link necklace
20 carat mixed size round brilliant diamond chain link necklace

20 carat mixed size round brilliant diamond chain link necklace

By LÖF

Located in Los Angeles, CA

The Vera Chain is the ultimate investment with around 250grams of either white gold and platinum or yellow gold. The undulating puffed out links alternate with oversized jump rings s...

Category

2010s American Art Deco Link Necklaces

Materials

Diamond, 18k Gold, Platinum

Earrings with Rubies & Diamonds in Platinum 950
Earrings with Rubies & Diamonds in Platinum 950

Earrings with Rubies & Diamonds in Platinum 950

Located in Lucerne, CH

With their refined beauty and intricate detailing, these earrings offer a timeless elegance, perfect for those who appreciate exquisite artisanship and the allure of a floral charm. ...

Category

20th Century European Modern Stud Earrings

Materials

Diamond, Ruby, Platinum

2.80 Carat Diamond Platinum Eternity Band Ring
2.80 Carat Diamond Platinum Eternity Band Ring

2.80 Carat Diamond Platinum Eternity Band Ring

Located in Stamford, CT

1950's Handmade custom diamond eternity band ring. 20 round brilliant cut diamonds set in a platinum setting. 20 round brilliant cut diamonds, F-G VS approx. 2.80cts Size 6.5 and s...

Category

Mid-20th Century Band Rings

Materials

Diamond, Platinum

Art Deco Platinum Ring with Diamonds and Sapphires
Art Deco Platinum Ring with Diamonds and Sapphires

Art Deco Platinum Ring with Diamonds and Sapphires

Located in Aventura, FL

This stunning Art Deco ring epitomizes the geometric elegance of the 1920s, crafted in lustrous platinum and featuring 20 old mine diamonds totaling 0.80 carats in beautiful H color ...

Category

Vintage 1920s Art Deco Engagement Rings

Materials

Diamond, Sapphire, Platinum

GIA Certified 20 Carat Type 2A FLAWLESS Clarity D Color Diamond Ring
GIA Certified 20 Carat Type 2A FLAWLESS Clarity D Color Diamond Ring

GIA Certified 20 Carat Type 2A FLAWLESS Clarity D Color Diamond Ring

Located in Chicago, IL

GIA Certified 20 Carat Type 2A Diamond Ring, boasting FLAWLESS clarity and a pristine D color rating. This exceptional diamond stands as a testament to rare beauty, reflecting light...

Category

2010s American Engagement Rings

Materials

Diamond, Platinum

ART-DECO 1930 Diamonds Station Long Necklace In Platinum With 8.40 Ctw Diamonds
ART-DECO 1930 Diamonds Station Long Necklace In Platinum With 8.40 Ctw Diamonds

ART-DECO 1930 Diamonds Station Long Necklace In Platinum With 8.40 Ctw Diamonds

Located in Miami, FL

Diamonds: Mounted in bezel settings, with 20 graduated European round brilliant cut diamonds, with an approximate total weight of about 8.40 Carats, F/G color, VS/SI clarity.

Category

Vintage 1930s American Art Deco Chain Necklaces

Materials

Diamond, White Diamond, Platinum

7.92 Carat White Emerald Diamonds Eternity Band Platinum 950
7.92 Carat White Emerald Diamonds Eternity Band Platinum 950

7.92 Carat White Emerald Diamonds Eternity Band Platinum 950

By FERRUCCI

Located in New York, NY

Eternity band with 7.92 Carat Emerald Cut Diamonds Mounted in Platinum 950, 20 Emerald cut diamonds won't miss a sparkle!

Category

2010s American Modern Bridal Rings

Materials

White Diamond, Diamond, Emerald, Platinum

Platinum Halo Diamond GIA Certified 2.30 Carat Russian Demantoid Garnet Ring
Platinum Halo Diamond GIA Certified 2.30 Carat Russian Demantoid Garnet Ring

Platinum Halo Diamond GIA Certified 2.30 Carat Russian Demantoid Garnet Ring

By DeKaraDesign

Located in Los Angeles, CA

Featuring an amazing deep green Ural Russian Demantoid garner with amazing horse tail inclusions. Ring is made in platinum, with 20 round dazzling diamonds that are all prong set.

Category

2010s American Engagement Rings

Materials

Diamond, Garnet, Platinum

20 Carat Natural No Heat Ceylon Color Change Blue Sapphire &Diamond Pendant AGL
20 Carat Natural No Heat Ceylon Color Change Blue Sapphire &Diamond Pendant AGL

20 Carat Natural No Heat Ceylon Color Change Blue Sapphire &Diamond Pendant AGL

Located in West Hollywood, CA

The Sapphire: This is a one of a kind 20.59 Carat Natural Untreated Ceylon Sapphire. It exhibits a rare full color change from a magnificent deep blue to a Vivid Violet purple. T...

Category

2010s American Modern Pendant Necklaces

Materials

Diamond, Blue Sapphire, Platinum

Antique Platinum 1.11ctw Old Mine Cut Diamond By The Yard Chain Necklace
Antique Platinum 1.11ctw Old Mine Cut Diamond By The Yard Chain Necklace

Antique Platinum 1.11ctw Old Mine Cut Diamond By The Yard Chain Necklace

Located in New York, NY

Weight: 17.8 Grams Primary Stone: 1.11ctw J Si2 Old Mine Cut Diamonds Measurements: 2.9 x 3.8mm Size: 20"  Metal: 800 Platinum Notes: Diamonds have chipping and abrasions Item #:...

Category

Early 20th Century Chain Necklaces

Materials

Diamond, Platinum

Tiffany & Co. Elsa Peretti Round Diamond Cross Pendant Necklace in Platinum
Tiffany & Co. Elsa Peretti Round Diamond Cross Pendant Necklace in Platinum

Tiffany & Co. Elsa Peretti Round Diamond Cross Pendant Necklace in Platinum

By Elsa Peretti for Tiffany & Co.

Located in Scottsdale, AZ

Retails for $4450 Metal: Platinum Natural Diamonds: .20 carat total weight Length: 16” Cross width: 13.5 mm Cross length: 16.5 mm Weight: 6.7 grams Stamped: Tiffany & Co.

Category

21st Century and Contemporary Unknown Contemporary Pendant Necklaces

Materials

Diamond, Platinum

Peter Suchy GIA Certified 3.37 Carat Diamond Platinum Engagement Ring
Peter Suchy GIA Certified 3.37 Carat Diamond Platinum Engagement Ring

Peter Suchy GIA Certified 3.37 Carat Diamond Platinum Engagement Ring

By Peter Suchy

Located in Stamford, CT

Peter Suchy 3.37 Carat Brilliant Diamond Engagement Ring. GIA certified center stone, set in a platinum setting with 20 round diamonds along the shank.

Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

26498 Tiffany & Co Platinum Diamond Bezel Halo Circlet Drop Pendant 16" Necklace
26498 Tiffany & Co Platinum Diamond Bezel Halo Circlet Drop Pendant 16" Necklace

26498 Tiffany & Co Platinum Diamond Bezel Halo Circlet Drop Pendant 16" Necklace

By Tiffany & Co.

Located in Chicago, IL

Circlet collection from Tiffany Platinum necklace weighs 3.9g 20 round diamonds, total carat weight 0.36ct Diamond F color VS1 clarity Pendant measures 25.3mm x 6.6mm wide Necklace ...

Category

21st Century and Contemporary American Modern Pendant Necklaces

Materials

Diamond, Platinum

Tiffany & Co. Elsa Peretti Cross Pendant Necklace with Diamonds in Platinum
Tiffany & Co. Elsa Peretti Cross Pendant Necklace with Diamonds in Platinum

Tiffany & Co. Elsa Peretti Cross Pendant Necklace with Diamonds in Platinum

By Elsa Peretti for Tiffany & Co.

Located in Scottsdale, AZ

This keepsake is truly a classic that will never go out of style. Metal: Platinum Natural Diamonds: .20 carat total weight Diamond cut: Round Brilliant Diamond color: G-H Diamond...

Category

21st Century and Contemporary Unknown Contemporary Pendant Necklaces

Materials

Diamond, Platinum

20 Round Brilliant Cut Diamond Wedding Band Eternity Ring in 18K White Gold
20 Round Brilliant Cut Diamond Wedding Band Eternity Ring in 18K White Gold

20 Round Brilliant Cut Diamond Wedding Band Eternity Ring in 18K White Gold

Located in Wan Chai District, HK

Timeless elegance meets infinite sparkle in this breathtaking eternity band featuring a continuous circle of round brilliant-cut diamonds. The classic four-prong setting showcases ea...

Category

21st Century and Contemporary Hong Kong Contemporary Wedding Rings

Materials

Diamond, White Diamond, Gold, 14k Gold, 18k Gold, Rose Gold, White Gold,...

Art Deco Era 20 Carat Oval-Cut Ceylon Sapphire and Old-Euro Cut Diamond Bracelet
Art Deco Era 20 Carat Oval-Cut Ceylon Sapphire and Old-Euro Cut Diamond Bracelet

Art Deco Era 20 Carat Oval-Cut Ceylon Sapphire and Old-Euro Cut Diamond Bracelet

By Bucherer

Located in Miami, FL

Centering an over 20 Carat Ceylon (Sri Lanka) Cornflower Blue Sapphire, accented by 14 Princess-Cut Blue Sapphires and 166 Old-European Cut Diamonds, and set in a 18K Gold/Platinum b...

Category

Early 20th Century Art Deco More Bracelets

Materials

Diamond, White Diamond, Sapphire, Gold, 18k Gold, White Gold, Platinum

9 Ct Cushion Colombian Emerald & Diamond 2.5 Ct Ring Platinum Ring, Estate
9 Ct Cushion Colombian Emerald & Diamond 2.5 Ct Ring Platinum Ring, Estate

9 Ct Cushion Colombian Emerald & Diamond 2.5 Ct Ring Platinum Ring, Estate

Located in New York, NY

Platinum 20 gm Diamonds: 2.48 Carat , Brilliant cut Round Stamped PT 900 Ring Size 6 Emerald: 9 Carat Origin : Colombia Color: Deep Green, Transparent extreme Fine Color Quali...

Category

Vintage 1980s Cocktail Rings

Materials

Diamond, Emerald, 18k Gold, Platinum

Natural 8 Carat Emerald Cut Zambian Emerald & Diamond Ring in Platinum, Estate
Natural 8 Carat Emerald Cut Zambian Emerald & Diamond Ring in Platinum, Estate

Natural 8 Carat Emerald Cut Zambian Emerald & Diamond Ring in Platinum, Estate

Located in New York, NY

Origin Zambia Platinum 20 gm with stone Diamonds: Baguettes & Brilliant cut round diamonds Diamonds approximately 5ct Emerald: Approximately 8 ct Stamped 900 for platinum All ...

Category

2010s Solitaire Rings

Materials

Diamond, Emerald, Platinum

Ring with a 12.20-carat blue sapphire (UNHEATED), IGI-certified, and diamonds
Ring with a 12.20-carat blue sapphire (UNHEATED), IGI-certified, and diamonds

Ring with a 12.20-carat blue sapphire (UNHEATED), IGI-certified, and diamonds

Located in Bergamo, BG

Ring made of platinum with a blue-violet sapphire pillow fabric by the yard 12.20 from Sri Lanka, NOT HEATED and 26 natural white brilliant-cut diamonds totaling 1.30 carats, set ...

Category

21st Century and Contemporary Italian Art Deco Fashion Rings

Materials

White Diamond, Blue Sapphire, Platinum

AGL Cert. 20 Carat No Heat Ceylon Yellow Sapphire Art Deco PT Filigree Pendant
AGL Cert. 20 Carat No Heat Ceylon Yellow Sapphire Art Deco PT Filigree Pendant

AGL Cert. 20 Carat No Heat Ceylon Yellow Sapphire Art Deco PT Filigree Pendant

By Unbranded

Located in Miami, FL

Antique Art Deco Era Platinum, Yellow Sapphire, and Diamond Pendant. This antique art deco pendant features a, non-heated Ceylon yellow sapphire.

Category

Vintage 1930s Sri Lankan Art Deco Pendant Necklaces

Materials

Diamond, Sapphire, Yellow Sapphire, Platinum

Vivid Diamonds 6.43 Carat Emerald Cut Diamond Eternity Band
Vivid Diamonds 6.43 Carat Emerald Cut Diamond Eternity Band

Vivid Diamonds 6.43 Carat Emerald Cut Diamond Eternity Band

Located in Miami, FL

Exquisite Vivid Diamonds eternity band crafted in Platinum, showcasing 20 stunning emerald cut diamonds weighing 6.43 carats total, D- F color, VVS clarity.

Category

21st Century and Contemporary American Modern Band Rings

Materials

Diamond, White Diamond, Platinum

Tiffany & Co. 1.17ct Diamond Full Eternity Ring
Tiffany & Co. 1.17ct Diamond Full Eternity Ring

Tiffany & Co. 1.17ct Diamond Full Eternity Ring

By Tiffany & Co.

Located in London, GB

Set around the ring an unbroken line of round brilliant diamonds are channel set within platinum. a total of 20 diamonds have been delicately set for a total of 1.17 carat.

Category

21st Century and Contemporary British Wedding Rings

Materials

Diamond, Platinum

7.00 Carat Emerald Cut Diamond Eternity Band
7.00 Carat Emerald Cut Diamond Eternity Band

7.00 Carat Emerald Cut Diamond Eternity Band

Located in New York, NY

Finely crafted in platinum with 20 Emerald cut Diamonds weighing a total of approximately 7.00 carats, H-I color, VS1-VS2 clarity. 6mm wide Size 6

Category

21st Century and Contemporary Wedding Rings

Materials

Diamond, Platinum

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Recent Sales

Edwardian .20 Carats Diamonds Platinum Ring
Edwardian .20 Carats Diamonds Platinum Ring

Edwardian .20 Carats Diamonds Platinum Ring

Located in Tampa, FL

A delicately filigreed Edwardian antique fashion ring crafted in platinum that features 3 European cut diamonds that weight .20ct. apx. T.W. The head and gallery are artistically pie...

Category

Vintage 1910s Unknown Edwardian Engagement Rings

Materials

Diamond, Platinum

20 Carat Baguette Diamond Ballerina Necklace 'Platinum'
20 Carat Baguette Diamond Ballerina Necklace 'Platinum'

20 Carat Baguette Diamond Ballerina Necklace 'Platinum'

By Shreve, Crump & Low

Located in Chestnut Hill, MA

Custom Platinum Diamond wavy Ballerina necklace consisting of baguette cut diamonds with a total weight of 20 carats with a color and clarity of F VS1-VS2 respectively.

Category

21st Century and Contemporary Unknown Modern Choker Necklaces

Materials

Diamond, Platinum

Antique .20 Carat Diamond Engagement Ring Platinum
Antique .20 Carat Diamond Engagement Ring Platinum

Antique .20 Carat Diamond Engagement Ring Platinum

Located in Tampa, FL

A crisply die-struck Art Deco diamond Antique engagement ring that features a .20ct. apx. transitional cut diamond with VS1 clarity and G color. It is accented by .06ct. apx. T.W. of...

Category

Vintage 1920s Unknown Art Deco Engagement Rings

Materials

Diamond, Platinum

Diamond by the Yard Style Platinum Necklace 20 Carat of Diamonds
Diamond by the Yard Style Platinum Necklace 20 Carat of Diamonds

Diamond by the Yard Style Platinum Necklace 20 Carat of Diamonds

Located in New York, NY

49 inch. platinum necklace consisting of 66 old mine brilliant cut diamonds.

Category

21st Century and Contemporary American Modern Link Necklaces

Materials

Diamond, Platinum

Exceptional Platinum and 20 Carat Diamond Bracelet, G/H, Vvs1
Exceptional Platinum and 20 Carat Diamond Bracelet, G/H, Vvs1

Exceptional Platinum and 20 Carat Diamond Bracelet, G/H, Vvs1

Located in London, London

Exceptional platinum mounted diamond bracelet, designed as a line set with 50 emerald cut diamonds, approx 20cts combined. The quality is simply outstanding, colour G / H, stones are...

Category

21st Century and Contemporary Unknown More Bracelets

Materials

Diamond, Platinum

64Facets Rose Cut Diamond and Platinum Chain Necklace, 20 Carat
64Facets Rose Cut Diamond and Platinum Chain Necklace, 20 Carat

64Facets Rose Cut Diamond and Platinum Chain Necklace, 20 Carat

By 64 Facets

Located in Los Angeles, CA

This necklace is 64 inches, has 5 thin platinum links between each diamond and has 20 carat diamond weight.

Category

2010s American Contemporary Chain Necklaces

Materials

Diamond, White Diamond, Platinum

Rare 456g Platinum Necklace With 5CTS VS Diamonds Cuban Necklace 20"
Rare 456g Platinum Necklace With 5CTS VS Diamonds Cuban Necklace 20"

Rare 456g Platinum Necklace With 5CTS VS Diamonds Cuban Necklace 20"

Located in Miami, FL

Crafted from high-quality platinum, the necklace boasts a beautiful 5CTS VS diamond pendant in a prong setting.

Category

2010s American Chain Necklaces

Materials

Diamond, Platinum

Platinum Ring Set with 20 Diamonds and 1 Synthetic Sapphire, France, 1925
Platinum Ring Set with 20 Diamonds and 1 Synthetic Sapphire, France, 1925

Platinum Ring Set with 20 Diamonds and 1 Synthetic Sapphire, France, 1925

Located in Heerlen, NL

- One (1) 950 / - Platinum ring, model oval entourage - Set with 20 8 side cut diamonds weighing: 0.66 ct - 1 oval cut synthetic sapphire of 3.30 ct. - France / England ca 1930 - Wei...

Category

Early 20th Century French Art Deco Cocktail Rings

Materials

Diamond, Sapphire, Platinum

Platinum 950 20 Carat Morganite Cocktail Ring by Jochen Leën
Platinum 950 20 Carat Morganite Cocktail Ring by Jochen Leën

Platinum 950 20 Carat Morganite Cocktail Ring by Jochen Leën

By Jochen Leën

Located in Antwerp, BE

Platinum 950 Cocktail Ring featuring a 20 Carat soft Pink Morganite stone.

Category

2010s Belgian Contemporary Cocktail Rings

Materials

Diamond, Morganite, Platinum

20 Carat Aquamarine  Diamond Shoulders Ring

20 Carat Aquamarine Diamond Shoulders Ring

Located in Stratford upon Avon, GB

Large aquamarine ring approximately 20cts with triangular diamond shoulders in yellow and white gold

Category

Mid-20th Century Retro Cocktail Rings

Materials

Aquamarine, Diamond, 18k Gold, Platinum

Tiffany & Co. Elsa Peretti Diamonds By The Yard 20 Stone Necklace Platinum
Tiffany & Co. Elsa Peretti Diamonds By The Yard 20 Stone Necklace Platinum

Tiffany & Co. Elsa Peretti Diamonds By The Yard 20 Stone Necklace Platinum

By Tiffany & Co.

Located in New York, NY

Model: Elsa Peretti Diamonds By The Yard 20 Stone Necklace Platinum and Diamonds Exterior Color: Silver Item Number: 222314/33

Category

21st Century and Contemporary Chain Necklaces

Platinum Diamond Circle Hoop Earrings
Platinum Diamond Circle Hoop Earrings

Platinum Diamond Circle Hoop Earrings

By Peter Atman

Located in New York, NY

A perfect circle hoop earrings, made in platinum,set with 20 round diamonds 0.20 carats. Earring diameter: 1.2 cm ( 1/2") We manufacture all of our jewelry, in our workshop located...

Category

2010s American Contemporary Hoop Earrings

Materials

Diamond, Platinum

Boulder Opal with 10.4 Ctw Blue Zircon and .20 Ctw Diamonds set in 18K, Platinum
Boulder Opal with 10.4 Ctw Blue Zircon and .20 Ctw Diamonds set in 18K, Platinum

Boulder Opal with 10.4 Ctw Blue Zircon and .20 Ctw Diamonds set in 18K, Platinum

By Diana Kim England

Located in Red Hook, NY

Boulder Opal with 10.37 ctw Blue Zircon and .20 ctw Diamonds set in 18k Gold and Platinum. One inch.

Category

21st Century and Contemporary American Artisan Stud Earrings

Materials

Opal, Zircon, 18k Gold, Platinum

Platinum Pair of Art Deco Brooch Double Click Closure, Pt 46.00 Dm 22, 30, 20's
Platinum Pair of Art Deco Brooch Double Click Closure, Pt 46.00 Dm 22, 30, 20's

Platinum Pair of Art Deco Brooch Double Click Closure, Pt 46.00 Dm 22, 30, 20's

By Fratelli Piccini

Located in Firenze, FI

A stunning pair of antique brooch, art deco style from 20's. covered by a beautiful set of brilliant and diamonds.

Category

Vintage 1920s Italian Art Deco Brooches

Materials

Diamond, Platinum

Antique Edwardian Diamond Filigree Platinum 18K Gold Ring
Antique Edwardian Diamond Filigree Platinum 18K Gold Ring

Antique Edwardian Diamond Filigree Platinum 18K Gold Ring

Located in Woodland Hills, CA

There are 12 rose cut diamonds and 3 old mine cut diamonds set in platinum.

Category

Vintage 1910s Unknown Edwardian Three-Stone Rings

Materials

Diamond, 18k Gold, Platinum

4.0ct Emerald Cut Diamond eternity band in platinum
4.0ct Emerald Cut Diamond eternity band in platinum

4.0ct Emerald Cut Diamond eternity band in platinum

Located in Surfside, FL

Emerald Cut Diamond eternity band or ring in platinum with 20 diamonds (G-H color, VS clarity) of 0.20pts each totaling appx. 4.0 carats.

Category

21st Century and Contemporary Band Rings

Materials

Platinum

18 Karat Yellow Gold and Platinum, Diamond and Black Onyx Bangle Bracelet
18 Karat Yellow Gold and Platinum, Diamond and Black Onyx Bangle Bracelet

18 Karat Yellow Gold and Platinum, Diamond and Black Onyx Bangle Bracelet

By Montreaux

Located in Chicago, IL

Stunning Montreaux 18K yellow gold and platinum bangle bracelet, set in platinum with 20 full cut round diamonds DE color, VVS clarity and black onyx

Category

1990s American Contemporary Bangles

Materials

Diamond, 18k Gold, Platinum

6.0ct Emerald Cut Diamond eternity band and ring
6.0ct Emerald Cut Diamond eternity band and ring

6.0ct Emerald Cut Diamond eternity band and ring

Located in Surfside, FL

6.0ct Emerald Cut Diamond eternity band in platinum with 20 diamonds (G-H color, VS clarity) of 0.30pts each totaling approximately 6 carats.

Category

21st Century and Contemporary Band Rings

Materials

Platinum

Antique Victorian Engagement Ring with Rose Cut Diamonds and Cabochon Opals
Antique Victorian Engagement Ring with Rose Cut Diamonds and Cabochon Opals

Antique Victorian Engagement Ring with Rose Cut Diamonds and Cabochon Opals

Located in Antwerp, BE

With the glistening of 20 surrounding rose cut diamonds set in platinum, this whimsical jewel from 1890 could be your personal wishing well full of red, green and blue shimmers meant...

Category

Antique 1890s Unknown Belle Époque Engagement Rings

Materials

Diamond, White Diamond, Opal, Gold, 14k Gold, White Gold, Yellow Gold, P...

35.00 Carat Star Sapphire Deco Ring
35.00 Carat Star Sapphire Deco Ring

35.00 Carat Star Sapphire Deco Ring

Located in Aventura, FL

Magnificent 35.00 Carat Star Sapphire Platinum Deco Ring set with 20 Diamonds weighing 0.80 Carats.

Category

Mid-20th Century Art Deco More Rings

Materials

Diamond, Star Sapphire, Platinum

Tiffany & Co. Elsa Peretti Diamonds by the Yard Platinum 20 Diamond Necklace
Tiffany & Co. Elsa Peretti Diamonds by the Yard Platinum 20 Diamond Necklace

Tiffany & Co. Elsa Peretti Diamonds by the Yard Platinum 20 Diamond Necklace

By Tiffany & Co.

Located in Southampton, PA

Prestigious resplendence, aesthetic refinement and tender femininity are clearly stated in this sublime necklace designed by Elsa Peretti for Tiffany & Co. which combines charming di...

Category

21st Century and Contemporary More Necklaces

Materials

Diamond, Yellow Gold

20 Carat Diamond Platinum Braclet
20 Carat Diamond Platinum Braclet

20 Carat Diamond Platinum Braclet

Located in Beverly Hills, CA

The bracelet is well made and created with perfectly matching emerald cut diamonds. There are 45 diamonds weighing approximately 20 carats, E,F in color and VVS, VS in clarity.

Category

Vintage 1960s Unknown Tennis Bracelets

Materials

Diamond, Platinum

Baguette Diamond Platinum Necklace, 20 Carats
Baguette Diamond Platinum Necklace, 20 Carats

Baguette Diamond Platinum Necklace, 20 Carats

Located in London, GB

A diamond necklace, with channel set baguette-cut diamonds, weighing an estimated total of 20.00ct, graduated, tapered towards the back, mounted in platinum. The length measures appr...

Category

Early 2000s American Modern Choker Necklaces

Materials

Diamond, Platinum

Platinum 20 Carat Diamond Cluster Earrings
Platinum 20 Carat Diamond Cluster Earrings

Platinum 20 Carat Diamond Cluster Earrings

Located in New York, NY

This vintage Round, Marquise, Pear Cut Cluster Statement earrings are created with best quality sparkling diamonds. This is a must have earring for any of your special events. These ...

Category

20th Century American Modern Clip-on Earrings

Materials

Diamond, Platinum

Tiffany & Co. Platinum 20 Carat Diamond Necklace
Tiffany & Co. Platinum 20 Carat Diamond Necklace

Tiffany & Co. Platinum 20 Carat Diamond Necklace

By Tiffany & Co.

Located in New York, NY

Tiffany & Co. Platinum 20 Carat Diamond Collar Necklace. Set with round brilliant cut diamonds of amazing quality.

Category

20th Century American Modern Necklace Enhancers

Materials

Diamond, Platinum

Mid Century 20 carat diamond platinum tennis necklace
Mid Century 20 carat diamond platinum tennis necklace

Mid Century 20 carat diamond platinum tennis necklace

Located in Beverly Hills, CA

This vintage platinum necklace from the 1950’s is a true statement of brilliance, showcasing a central round brilliant cut diamond of approximately 1 carat, graded F-G color and VS c...

Category

Vintage 1950s Pendant Necklaces

Materials

Diamond, Platinum

Diamond Platinum Anniversary Style Ring, Band, 20 Diamonds, .2 Carat
Diamond Platinum Anniversary Style Ring, Band, 20 Diamonds, .2 Carat

Diamond Platinum Anniversary Style Ring, Band, 20 Diamonds, .2 Carat

Located in Milford, DE

An elegant ring, featuring two rows of ten 1mm diamonds each, for a total of 20 diamonds. Set in a finely crafted platinum band, which accentuates the diamonds' brilliant shine.

Category

Late 20th Century Engagement Rings

Materials

Diamond, Platinum

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Platinum 20 Diamonds For Sale on 1stDibs

There is a broad range of platinum 20 diamonds for sale on 1stDibs. Frequently made of Platinum, Gold and 18k Gold, these items were constructed with great care. Our collection of these items for sale includes 11013 vintage editions and 305 modern creations to choose from as well. Our collection is diverse and broad-ranging, and pieces in stock date back to the 18th Century while others were produced as recently as the 21st Century. Pieces in our collection of platinum 20 diamonds made by Art Deco jewelers — as well as those associated with Edwardian — are very popular. Tiffany & Co., David Webb and Cartier each produced beautiful examples of these items that are worth considering. Today, if you’re looking for round cut platinum 20 diamonds and are unable to find the perfect match, our selection also includes old european cut and emerald cut alternatives. When shopping our range of platinum 20 diamonds, you’ll find that there are less available pieces for men today than there are for women.

How Much are Platinum 20 Diamonds?

Prices for platinum 20 diamonds can differ depending upon size, time period and other attributes — at 1stDibs, these accessories begin at $1 and can go as high as $6,500,000, while platinum 20 diamonds, on average, fetch $8,461.

The Legacy of Diamond in Jewelry Design

Antique diamond rings, diamond tiaras and dazzling vintage diamond earrings are on the wish lists of every lover of fine jewelry. And diamonds and diamond jewelry are primarily associated with storybook engagements and red-carpet grand entrances — indeed, this ultra-cherished gemstone has a dramatic history on its hands.

From “A Diamond Is Forever” to “Diamonds Are a Girl’s Best Friend,” pop culture has ingrained in our minds that diamonds are the most desired, the most lasting and the most valuable gemstone. But what makes the diamond so special? Each stone — whether it’s rubies, sapphires or another stone — is unique and important in its own right. April babies might claim diamonds for themselves, but just about everyone wants this kind of sparkle in their lives!

There are several factors that set diamonds apart from other stones, and these points are important to our gem education.

Diamonds are minerals. They are made up of almost entirely of carbon (carbon comprises 99.95 percent; the remainder consists of various trace elements). Diamonds are the hardest gemstones, ranking number 10 on the Mohs Hardness Scale. Even its name, diamond, is rooted in the Greek adamas, or unconquerable. The only object that can scratch a diamond is another diamond. Diamonds are formed deep within the earth at very high temperatures (1,652–2,372 degrees Fahrenheit at depths between 90 and 120 miles beneath the earth’s surface) and are carried up by volcanic activity. Diamonds are quite rare, according to the Gemological Institute of America, and only 30 percent of all the diamonds mined in the world are gem quality.

In the 1950s, the Gemological Institute of America developed the 4Cs grading system to classify diamonds: clarity, color, cut and carat weight. Not all diamonds are created equal (there are diamonds, and then there are diamonds). The value of the diamond depends on the clarity (flawless diamonds are very rare but a diamond's value decreases if there are many blemishes or inclusions), color (the less color the higher the grade), cut (how the diamond’s facets catch the light, certain cuts of diamonds show off the stone better than others) and carat weight (the bigger, the better).

When you start shopping for a diamond engagement ring, always prioritize the cut, which plays the largest role in the diamond's beauty (taking the time to clean your diamond ring at least every six months or so plays a role in maintaining said beauty). And on 1stDibs, a range of buying guides can be found for those in the market for antique engagement ringsvintage engagement rings or Art Deco engagement rings

Shop antique and vintage diamond rings, diamond necklaces and other extraordinary diamond jewelry on 1stDibs.