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Mid-20th Century Loose Gemstones

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Period: Mid-20th Century
GIA No Heat Natural Cabochon Burma Sapphire Weighing 8.06 Carat Loose Stone
GIA No Heat Natural Cabochon Burma Sapphire Weighing 8.06 Carat Loose Stone

GIA No Heat Natural Cabochon Burma Sapphire Weighing 8.06 Carat Loose Stone

By OGI Ltd

Located in New York, NY

Introducing an Exquisite 8.06 Carat GIA Certified Natural Cabochon Burma Sapphire - A Rare Gem of Unparalleled Beauty Discover the allure of this mesmerizing 8.06 carat GIA-certified...

Category

Burmese Contemporary Vintage Mid-20th Century Loose Gemstones

Materials

Sapphire, Blue Sapphire

AGL Certified Gemstone Natural Corundum Pink Sapphire Weighing 2.92 Carats
AGL Certified Gemstone Natural Corundum Pink Sapphire Weighing 2.92 Carats

AGL Certified Gemstone Natural Corundum Pink Sapphire Weighing 2.92 Carats

By OGI Ltd

Located in New York, NY

AGL certificate Natural Pink Sapphire weighing 2.92 carats Purplish Pink Color Oval Shaped, mix cut Heated Color Stability Excellent Measuring 8.63x7.11x5.10 mm Natural corundum pi...

Category

Sri Lankan Contemporary Mid-20th Century Loose Gemstones

Materials

Pink Sapphire

Vintage heart cut amethyst gemstones, loose stones
Vintage heart cut amethyst gemstones, loose stones

Vintage heart cut amethyst gemstones, loose stones

Located in NEWARK, GB

A beautiful set of three vintage heart cut amethyst gemstones. Great quality, rich and deep purple amethysts, genuine vintage from the 60s era, mid century when bold and colourful p...

Category

British Retro Mid-20th Century Loose Gemstones

Materials

Amethyst

GIA Certified Oval Brilliant Loose Diamond 1.48ct
GIA Certified Oval Brilliant Loose Diamond 1.48ct

GIA Certified Oval Brilliant Loose Diamond 1.48ct

Located in Laguna Beach, CA

1.48-carat oval brilliant cut diamond. GIA graded H color, Vs1 clarity. Measures 7.89 x 6.31 x 4.51mm The grading report number is 1226958994. Comes with the original grading certifi...

Category

Mid-20th Century Loose Gemstones

Materials

Diamond

GIA CERTIFIED Natural Coral Huge Round Cabochon Cut 46.95 Carats GIA-2215188171
GIA CERTIFIED Natural Coral Huge Round Cabochon Cut 46.95 Carats GIA-2215188171

GIA CERTIFIED Natural Coral Huge Round Cabochon Cut 46.95 Carats GIA-2215188171

Located in Miami, FL

GIA certified round cabochon cut Italian coral. An exceptionally rare and impressive natural Italian coral weighing 46.95 carats, this remarkable gemstone exhibits outstanding quali...

Category

Italian Modernist Vintage Mid-20th Century Loose Gemstones

Materials

Coral

Natural 7.60 Carat Loose Dark Purple Amethyst Trilliant Shape from Brazil
Natural 7.60 Carat Loose Dark Purple Amethyst Trilliant Shape from Brazil

Natural 7.60 Carat Loose Dark Purple Amethyst Trilliant Shape from Brazil

Located in Peshawar, PK

Gemstone Type : Amethyst Weight : 7.60 Carats Dimensions : 14x13.4x8.9 mm Clarity : Eye Clean Origin : Brazil Color: Purple Shape:Trillion Certificate: On Demand Month: February Purp...

Category

Brazilian Arts and Crafts Mid-20th Century Loose Gemstones

Materials

Amethyst

90 Carat Colombia Emerald Massive Piece Loose Gemstone Head Turner
90 Carat Colombia Emerald Massive Piece Loose Gemstone Head Turner

90 Carat Colombia Emerald Massive Piece Loose Gemstone Head Turner

By Malpani Jewels

Located in Hung Hom, HK

Elevate your collection with this remarkable 90 carat Colombian emerald, a gemstone that radiates sophistication and luxury. Known as the world’s premier source of emeralds, Colombia...

Category

Japanese Art Nouveau Vintage Mid-20th Century Loose Gemstones

Materials

Emerald

GIA Certified 1.19ct Princess Cut Diamond, H Color, VS2 Clarity
GIA Certified 1.19ct Princess Cut Diamond, H Color, VS2 Clarity

GIA Certified 1.19ct Princess Cut Diamond, H Color, VS2 Clarity

Located in Laguna Beach, CA

Beautiful diamond. 1.19 carat princess cut diamond. H color, VS2 clarity, very good symmetry, no fluorescence. GIA grading report number is 6214450263.

Category

Mid-20th Century Loose Gemstones

Materials

Diamond

GIA Certified Round Brilliant Cut Loose Diamond 1.01 ct
GIA Certified Round Brilliant Cut Loose Diamond 1.01 ct

GIA Certified Round Brilliant Cut Loose Diamond 1.01 ct

Located in Laguna Beach, CA

Loose 1.01 carat round brilliant cut diamond. GIA graded G color, Si2 clarity, Very Good cut grade. Measures 6.55-6.63 x 3.90mm The GIA grading report number is 5221756497. Faces up ...

Category

Mid-20th Century Loose Gemstones

Materials

Diamond

Art Deco 31.55ct Colombian Green Pear Shape Emerald, Loose Gemstone
Art Deco 31.55ct Colombian Green Pear Shape Emerald, Loose Gemstone

Art Deco 31.55ct Colombian Green Pear Shape Emerald, Loose Gemstone

Located in Palm Desert, CA

Offered here is a remarkable 31.55-carat natural emerald, certified by the Gemological Institute of America (Report #2235423324, dated October 29, 2024). This impressive gemstone is ...

Category

South American Art Deco Vintage Mid-20th Century Loose Gemstones

Materials

Emerald

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6.35 Carat Natural Loose Greenish Amethyst Stone Emerald Cut African Gemstone
6.35 Carat Natural Loose Greenish Amethyst Stone Emerald Cut African Gemstone

6.35 Carat Natural Loose Greenish Amethyst Stone Emerald Cut African Gemstone

Located in Bangkok, TH

Weight 6.35 carat Dimensions 17.5x7.8x6.4mm Treatment None Origin African Clarity Eye Clean Shape Cut Emerald This 6.35 carat Natural Greenish Amethyst is a beautifully rare...

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Modern Mid-20th Century Loose Gemstones

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GIA Certified 0.58CT S-T I2 Round Brilliant Loose Diamond
GIA Certified 0.58CT S-T I2 Round Brilliant Loose Diamond

GIA Certified 0.58CT S-T I2 Round Brilliant Loose Diamond

Located in New York, NY

ITEM DESCRIPTIO ID #: 56566 Stone Shape: Round Brilliant Diamond Weight: 0.58CT Clarity: I2 Color: S-T light brown Cut: Fair Measurements: 5.14-5.21*3.38mm Depth %: 65.4% Table %:...

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Antique Mid-20th Century Loose Gemstones

Materials

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5.70 Carat Natural Loose Greenish Amethyst Stone Cushion Cut African Gemstone
5.70 Carat Natural Loose Greenish Amethyst Stone Cushion Cut African Gemstone

5.70 Carat Natural Loose Greenish Amethyst Stone Cushion Cut African Gemstone

Located in Bangkok, TH

Weight 5.70 carat Dimensions 12.0x10.2x7.5mm Treatment None Origin Africa Clarity Loup Clean Shape Cut Cushion This beautiful 5.70 carat Natural Greenish Amethyst is an eleg...

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Modern Mid-20th Century Loose Gemstones

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Certified 1.4 Carat Natural Vivid Pink Cushion Mixed Eye Clean Pink Sapphire
Certified 1.4 Carat Natural Vivid Pink Cushion Mixed Eye Clean Pink Sapphire

Certified 1.4 Carat Natural Vivid Pink Cushion Mixed Eye Clean Pink Sapphire

Located in Kowloon, HK

Introducing a stunning natural vivid pink sapphire, weighing 1.4 carats, that is sure to capture your heart. This gemstone boasts a vibrant and lively color that is simply breathtaki...

Category

Tanzanian Modern Mid-20th Century Loose Gemstones

Materials

Pink Sapphire

Majestic 52 Carat Intense Purple Brazilian Amethyst & Diamond 18K Gold Necklace
Majestic 52 Carat Intense Purple Brazilian Amethyst & Diamond 18K Gold Necklace

Majestic 52 Carat Intense Purple Brazilian Amethyst & Diamond 18K Gold Necklace

Located in Tustin, CA

Magnificent, very majestic and opulent in real life, huge natural intense purple Brazilian Amethyst and diamond necklace is prong set in 18 karat white gold and has a combined total ...

Category

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Materials

Diamond, Amethyst, 18k Gold, White Gold

3.05 Carat Natural Loose Greenish Amethyst Stone Emerald Cut African Gemstone
3.05 Carat Natural Loose Greenish Amethyst Stone Emerald Cut African Gemstone

3.05 Carat Natural Loose Greenish Amethyst Stone Emerald Cut African Gemstone

Located in Bangkok, TH

Weight 3.05 carat Dimensions 11.4x7.0x5.5mm Treatment None Origin African Clarity Eye Clean Shape Cut Emerald This 3.05 carat Natural Greenish Amethyst is a unique and eleg...

Category

Modern Mid-20th Century Loose Gemstones

Materials

Amethyst

5.90 Carat Natural Loose Amethyst Stone Cushion Cut Brazilian Gemstone
5.90 Carat Natural Loose Amethyst Stone Cushion Cut Brazilian Gemstone

5.90 Carat Natural Loose Amethyst Stone Cushion Cut Brazilian Gemstone

$136Sale Price|20% Off

W 0.4 in D 0.28 in L 0.51 in

5.90 Carat Natural Loose Amethyst Stone Cushion Cut Brazilian Gemstone

Located in Bangkok, TH

WEIGHT 5.90 carats DIMENSIONS 12.9 x 10.0 x 7.1 mm CLARITY Eye Clean SHAPE Cushion CUT Custom Cushion ORIGIN Brazil TREATMENT None This 5.90 Carat Natural Loose Amethyst...

Category

Brazilian Modern Mid-20th Century Loose Gemstones

Materials

Amethyst

Gia Certified 1.46 Carat Pear Brilliant I I2 Natural Diamond
Gia Certified 1.46 Carat Pear Brilliant I I2 Natural Diamond

Gia Certified 1.46 Carat Pear Brilliant I I2 Natural Diamond

$3,680Sale Price|20% Off

W 0.39 in D 0.16 in L 0.26 in

Gia Certified 1.46 Carat Pear Brilliant I I2 Natural Diamond

Located in New York, NY

ITEM DESCRIPTION ID #: NY56228 Stone Shape: PEAR BRILLIANT Diamond Weight: 1.46ct Clarity: I2 Color: I Cut: Excellent Measurements: 9.69 x 6.42 x 3.98 mm Depth %: 62.1% Table %: 61%...

Category

Mid-20th Century Loose Gemstones

Materials

Diamond, White Diamond

16.41 Carats Burmese Blue Sapphire No Heat Round cabochon Natural sapphire gem
16.41 Carats Burmese Blue Sapphire No Heat Round cabochon Natural sapphire gem

16.41 Carats Burmese Blue Sapphire No Heat Round cabochon Natural sapphire gem

Located in Jaipur, RJ

Burmese Blue Sapphire Round for Fine Jewellery Gemstone: Blue Sapphire No Heat Type : Burmese Shape: cabochon Carat weight: 16.41 Size - 10 To 12

Category

Burmese Mid-20th Century Loose Gemstones

Materials

Blue Sapphire

No Heat Loose Burmese Round Sapphire Cts 8.76
No Heat Loose Burmese Round Sapphire Cts 8.76

No Heat Loose Burmese Round Sapphire Cts 8.76

Located in Hong Kong, HK

Its pristine beauty remains untouched by heat treatment. This exquisite 8.76 ct gem is sourced from the rich mines of Burma. It shimmers like a disco ball and dazzles on all fronts...

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Hong Kong Contemporary Mid-20th Century Loose Gemstones

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Sapphire

257.55 Carat Natural Brazilian Amethyst with Tanzanite Pendant Necklace
257.55 Carat Natural Brazilian Amethyst with Tanzanite Pendant Necklace

257.55 Carat Natural Brazilian Amethyst with Tanzanite Pendant Necklace

By Sabrina Balsky Jewelry

Located in New York, NY

One of a Kind Handmade Pendant Necklace Sabrina Balsky Jewelry 257.55 carats Natural Amethyst very clean stone set with Tanzanite set prong detail with signature design on bail and around stone. Rhodium plated Sterling size of Pendant is 2-9/16" height and 1-1/14" wide. Very unusual piece of jewelry. Can be sold with Necklace of Angelite, Iolite, Tanzanite, Brazilian Amethyst, and Zambian Amethyst...

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American Modern Mid-20th Century Loose Gemstones

Materials

Amethyst, Tanzanite, Rhodium, Sterling Silver

Previously Available Items
GIA Certified Round Brilliant Cut Diamond 1.83ct
GIA Certified Round Brilliant Cut Diamond 1.83ct

GIA Certified Round Brilliant Cut Diamond 1.83ct

Located in Laguna Beach, CA

1.83-carat round brilliant cut diamond. GIA grade J color, i1 clarity. The two inclusions are located toward the edge and are hard to see without 10-power magnification. Measures 7.7...

Category

Mid-20th Century Loose Gemstones

Materials

Diamond

GIA Certification Natural Star Sapphire Oval Cabochon 6.89 Carats No Heat
GIA Certification Natural Star Sapphire Oval Cabochon 6.89 Carats No Heat

GIA Certification Natural Star Sapphire Oval Cabochon 6.89 Carats No Heat

By OGI Ltd

Located in New York, NY

Product Description: Discover the allure of this exquisite natural star sapphire, a gem that captivates with its mesmerizing beauty and rarity. This stunning gemstone is perfect for ...

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Sri Lankan Contemporary Mid-20th Century Loose Gemstones

Materials

Star Sapphire

GIA Certified No Heat Octagonal Natural Ruby Weighing 1.34 Carats
GIA Certified No Heat Octagonal Natural Ruby Weighing 1.34 Carats

GIA Certified No Heat Octagonal Natural Ruby Weighing 1.34 Carats

By OGI Ltd

Located in New York, NY

GIA Certified No Heat Octagonal Natural Ruby - 1.34 Carats Elevate your jewelry collection with this exquisite GIA Certified No Heat Octagonal Natural Ruby, a rare and coveted gemsto...

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American Contemporary Mid-20th Century Loose Gemstones

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Ruby

GIA No Heat Natural Cabochon Burma Sapphire Weighing 8.35 Carat Loose Stone
GIA No Heat Natural Cabochon Burma Sapphire Weighing 8.35 Carat Loose Stone

GIA No Heat Natural Cabochon Burma Sapphire Weighing 8.35 Carat Loose Stone

By OGI Ltd

Located in New York, NY

Introducing an Exquisite 8.35 Carat GIA Certified Natural Cabochon Burma Sapphire - A Rare Gem of Unparalleled Beauty Discover the allure of this mesmerizing 8.35 carat GIA-certified...

Category

Burmese Contemporary Vintage Mid-20th Century Loose Gemstones

Materials

Sapphire, Blue Sapphire

11.50 Carat Enchanting Elegance Stunning Asscher Cut Green Amethyst Ring Gem
11.50 Carat Enchanting Elegance Stunning Asscher Cut Green Amethyst Ring Gem

11.50 Carat Enchanting Elegance Stunning Asscher Cut Green Amethyst Ring Gem

Located in Peshawar, PK

Faceted Green Amethyst Weight: 11.50 Carats Dimension: 14.5x11.7x9.9 Mm Origin: Brazil Shape: Emerald Cut/Facet: Asscher Color: Green Certificate: On Demand Green amethyst, als...

Category

Brazilian Arts and Crafts Mid-20th Century Loose Gemstones

Materials

Amethyst

GIA Certified No Heat Natural Sapphire Origin Sri Lanka Weighing 2.80 Carat
GIA Certified No Heat Natural Sapphire Origin Sri Lanka Weighing 2.80 Carat

GIA Certified No Heat Natural Sapphire Origin Sri Lanka Weighing 2.80 Carat

By OGI Ltd

Located in New York, NY

GIA certified no indication of heat, oval Sri Lanka sapphire weighing 2.80 carats GIA REPORT 2225687488 Cutting Style: Crown Modified Brilliant Cut Cutting Style: Pavilion Step Cut Transparency Transparent Color Blue Species Natural Corundum Variety Natural Sapphire Geographic Origin Sri Lanka TREATMENT No Indications of Heating Item Description: One loose stone Weight: 2.80 carats Measurements: 9.06 x 5.22 x 6.08 mm A GIA Natural Sapphire report is a gemological report issued...

Category

Sri Lankan Contemporary Vintage Mid-20th Century Loose Gemstones

Materials

Sapphire

GIA Certified Oval Ruby Natural Corundum Loose Stone Weighing 2.09 Carat Heated
GIA Certified Oval Ruby Natural Corundum Loose Stone Weighing 2.09 Carat Heated

GIA Certified Oval Ruby Natural Corundum Loose Stone Weighing 2.09 Carat Heated

By OGI Ltd

Located in New York, NY

Rubies are highly prized gemstones known for their vibrant red color and durability. G I A Gemological Report 2225734049 Ruby shaped Oval Cutting Style: Crown Brilliant Cut Cutting Style: Pavilion Step Cut Transparency Transparent Color Red Species Natural Corundum Heated Weight: 2.09 carats Measurements: 8.48 x 6.68 x 4.02 m A GIA Ruby Report is a gemological report issued...

Category

Burmese Contemporary Vintage Mid-20th Century Loose Gemstones

Materials

Ruby