4 cts, Very unusual Orange violet faceted spinel
By True Gems
Located in บางรัก, TH
Very unusual Orange violet faceted spinel sku842 Weight: 4 cts Size: 9.2x9x6.2 mm Due to inclusions looks like bi-color Very interesting stone Perfect cut
Spinel
23.95 Cts, Collectible Russian alexandrite specimen
By True Gems
Located in บางรัก, TH
Collectible Russian alexandrite specimen sku812 Size: 23.0 x 17.7 x 8.4 mm Weight: 23.95 ct Can use for jewelry and put this stone into the ring or pendant Mined at Malyshevskoye dep...
Alexandrite, Chrysoberyl, Crystal
1.22 carat, Faceted oval blue sapphire
By True Gems
Located in บางรัก, TH
Faceted oval blue sapphire sku778 Weight: 1.22 cts Size: 6.8x5.09x3.7 mm Color: blue Origin: Sri Lanka
Blue Sapphire
303 ct, Natural black qurtz morion crystal on feldspar matrix
By True Gems
Located in บางรัก, TH
Natural black qurtz morion crystal on feldspar matrix sku802 Size: 67.5 x 37.6 x 31.0 mm Weight: 303 ct
Crystal, Quartz
1.15 cts, Certified royal blue sapphire
By True Gems
Located in บางรัก, TH
Certified royal blue sapphire sku774 Weight: 1.15 cts Size: 6.86x5.67x3.05 mm Color: royal blue
Sapphire, Blue Sapphire
2.49 carats, Untreated faceted Tanzanite
By True Gems
Located in บางรัก, TH
Untreated faceted Tanzanite A beautiful option – a completely untreated Tanzanite with a striking color shift. Weight: 2.49 carats
Tanzanite
4.30 Carat Natural Loose Peach Pink Tourmaline Cushion Cut Gemstone
Located in Peshawar, PK
Faceted Peach Pink Tourmaline Weight: 4.30 Carat Dimension: 11.4 x 7.7 x 6.2 Mm Colour: Peach Pink Origin: Afghanistan Treatment: Non Certificate: On Customer Demand Tourmali...
Tourmaline, Other
GIA certified, 5.16 Carats, Natural Violet Sapphire, Oval Cut, Sri Lankan Gemsto
By True Gems
Located in บางรัก, TH
Natural Violet Sapphire Oval Cut Weight: 5.16 Carats Size: 11.00x8.9x6.6 mm Color: blue Origin: Sri Lanka GIA certified
Sapphire
3.82 cts, Rough alexandrite specimen
By True Gems
Located in บางรัก, TH
Rough alexandrite specimen sku735 Size: 12x7x4 mm Weight: 3.82 cts Can use for jewelry and put this stone into the ring or pendant Mined at Malyshevskoye deposit, Ural Mountains, Rus...
Alexandrite, Chrysoberyl, Crystal
0.92 ct, Faceted vivid yellow sphene
By True Gems
Located in บางรัก, TH
Faceted vivid yellow sphene sku833 100% natural Weight: 0.92 cts Size: 6x6x3 mm Color: yellow Origin: Madagascar
Other
2.20ct Grey Spinel Gemstone, Emerald Cut, Tanzania by Gilt Gemstone
Located in Peshawar, PK
Faceted Spinel Weight : 2.20 Carat Dimension: 8.6 x 6.5 x 4 Mm Origin: Tanzania Treatment: Non Certificate: On Customer Demand Spinels is a captivating gemstone prized for its b...
Spinel, Other
1.34 cts, Faceted pink tourmaline pair
By True Gems
Located in บางรัก, TH
Faceted pink tourmaline pair sku666 Weight: 1.34 cts Diameter 5.5 mm Origin: Afghanistan
Tourmaline
3.61, Faceted Sleepy Blue Sapphire
By True Gems
Located in บางรัก, TH
Heated faceted blue sapphire sku54 Size: 11.10 х 8.50 х 4.13 mm Mining location: Sri Lanka Nice incusions - very obvious color zoning Weight: 3.61 ct Shape: Oval Treatment: normal he...
Sapphire, Blue Sapphire
13.7 ct, Faceted kunzite
By True Gems
Located in บางรัก, TH
Faceted kunzite sku792 Weight: 13.7 ct Origin: Afghanistan
Kunzite
1.36 carat, Faceted oval blue sapphire
By True Gems
Located in บางรัก, TH
Faceted oval blue sapphire sku777 Weight: 1.36 cts Size: 6.5x5.8x4.2 mm Color: blue Origin: Sri Lanka
Blue Sapphire
3.85 Carat Natural Loose Bi Colour Tourmaline Emerald Shape Gemstone
Located in Peshawar, PK
Faceted Bi Colour Tourmaline Weight: 3.85 Carat Dimension: 9.6 x 7.3 x 5.8 Mm Colour: Black And Pink Origin: Afghanistan Treatment: Non Certificate: On Customer Demand Tourm...
Tourmaline, Other
Certified Faceted emerald, 0.24 cts
By True Gems
Located in บางรัก, TH
Certified Faceted emerald sku214 Weight: 0.24 cts Size: 3.83 x 3.62 x 2.76 mm Color: green 100% natural Origin: Colombia GFCO laboratory certificate.
Emerald
2.53 cts, Untreated bluish violet sapphire with a GIA certificate
By True Gems
Located in บางรัก, TH
Untreated bluish violet sapphire with a GIA certificate sku04 Weight: 2.53 carats Size: 8.72x6.82x4.98 mm Origin: Sri Lanka
Sapphire, Blue Sapphire
3.12 cts, Untreated purple sapphire with a GIA certificate
By True Gems
Located in บางรัก, TH
Untreated purple sapphire with a GIA certificate sku05 Weight: 3.12 carats Size: 8.23x6.34x5.97 mm Origin: Sri Lanka
Sapphire, Purple Sapphire
4.8 ct, Faceted orange garnet, spessatite garnet
By True Gems
Located in บางรัก, TH
Faceted spessartite orange garnet sku69 From Nigeria Size: 9.7x8.8x5.5 mm Weight: 4.8 ct
Garnet
17.5 cts, Russian alexandrite rough crystal, chrysoberyl raw crystal
By True Gems
Located in บางรัก, TH
Russian alexandrite rough crystal, chrysoberyl raw crystal sku675 Size: 16x13x10 mm Weight: 17.5 cts Perfect for collection or jewelry Mined at Malyshevskoye deposit, Ural Mountai...
Alexandrite, Chrysoberyl, Crystal
GIA Certified Colombian Emerald 1.26ct Octagonal Cut, Unisex, 1990
Located in Brooklyn, NY
Stone: Colombian Emerald Total Weight: 1.26 carat Shape: Octagonal Cut Clarity: Transparent Luster: Very Good Color: Medium Bluish Green Measurements: 6.99 mm x 6.48 mm x 3.83 mm . G...
Emerald
Faceted blue sapphire, 1.56 ct
By True Gems
Located in บางรัก, TH
Faceted blue sapphire sku449 Weight: 1.56 ct Size: 5.8x4 mm Color: blue Origin: Sri Lanka Treatment heated, excellent cutting
Sapphire, Blue Sapphire
21.75 Cts, Collectible Russian alexandrite specimen
By True Gems
Located in บางรัก, TH
Collectible Russian alexandrite specimen sku811 Size: 21.3 x 17.6 x 11.2 mm Weight: 21.75 ct Can use for jewelry and put this stone into the ring or pendant Mined at Malyshevskoye de...
Alexandrite, Chrysoberyl, Crystal
1 carat, Faceted oval blue sapphire
By True Gems
Located in บางรัก, TH
Faceted oval blue sapphire sku776 Weight: 1 cts Size: 6.5x5.5x2.9 mm Color: blue Origin: Sri Lanka
Blue Sapphire
2.05 cts, Faceted Mahenge pinkish red spinel
By True Gems
Located in บางรัก, TH
Faceted Mahenge pinkish red spinel sku826 Weight: 2.05 cts Color: pinkish red Size: 6.65x56.47x5.21 mm
Spinel
Faceted aquamarine octagon, 1.45 cts
By True Gems
Located in บางรัก, TH
Faceted aquamarine octagon sku253 Weight: 1.45 cts Size: 9.5x5.6x3.4 mm
Aquamarine
1.24 cts, Drop Shape Tourmaline Rubellite Pair
By True Gems
Located in บางรัก, TH
Drop shape tourmaline rubellite pair sku186 Weight: 1.24 ct Size: 6.3x4.4x3.1 mm Color: Pink Cut shape: Drop Place of extraction: Nigeria. Certificate from any lab is available, Pl...
Tourmaline
5.12 Carat Old Mine Cut Diamond – J Color, SI1 Clarity, GIA Certified
Located in Dubai, Dubai
A remarkable 5.12 carat Old Mine Cut diamond of exceptional presence and antique character, this GIA-certified diamond showcases the timeless beauty of historic diamond cutting. Grad...
Diamond
2.34 cts, Certified faceted unheated tanzanite
By True Gems
Located in บางรัก, TH
Certified faceted unheated tanzanite sku772 Weight: 2.34 cts Size: 10x6.8x5.6 mm Color: blue Origin: Tanzania. Beautiful stones with colores of madagascar sapphire and afghan tourmal...
Tanzanite
2.58 cts, Opalescent effect natural pink sapphire
By True Gems
Located in บางรัก, TH
Opalescent effect natural pink sapphire Origin: Sri Lanka Size: 9.1 x 7.0 x 4.7 mm Weight: 2.58 ct Shape: octagon
Sapphire, Pink Sapphire
63.5 cts, Round labradorite cabochon
Located in บางรัก, TH
Round labradorite cabochon sku397 Weight: 63.5 cts Diameter: 34 mm Heigh: 4 mm Origin: Madagascar
Labradorite
3.77 cts, Faceted untreated blue sapphire with a GIA certificate
By True Gems
Located in บางรัก, TH
Faceted untreated blue sapphire with a GIA certificate sku09 Weight: 3.77 carats Size: 8.89×6.92×5.86 mm Origin: Sri Lanka
Blue Sapphire
Colombian Emerald Loose Gemstone, 0.44ct Octagonal Cut, 1990s
Located in Brooklyn, NY
Stone: Colombian Emerald Total Weight: 0.44 carat Shape: Octagonal Cut Clarity: Transparent Luster: Very Good Color: Medium Bluish Green Measurements: 4.72 mm x 4.33 mm x 3.03 mm Geo...
Emerald
41.60 Cts, Collectible Russian alexandrite specimen
By True Gems
Located in บางรัก, TH
Collectible Russian alexandrite specimen sku807 Size: 24.1 x 19.2 x 17.0 mm Weight: 41.60 ct Can use for jewelry and put this stone into the ring or pendant Mined at Malyshevskoye de...
Alexandrite, Chrysoberyl, Crystal
2.57 ct, Rare Certified Russian faceted vivid green demantoid garnet
By True Gems
Located in บางรัก, TH
Rare Certified Russian faceted vivid green demantoid garnet sku840 !!️Tagil, Bobrovka deposit = no treatments (no heating) Weight: 2.57 ct Size: 8.44x8.36x5.26 mm Everyone from gems...
Garnet
1.07 ct, Faceted yellow sapphire
By True Gems
Located in บางรัก, TH
Faceted yellow sapphire sku786 Weight: 1.07 cts Size: 5.9x5.9x4.5 mm Origin: Sri Lanka
Sapphire, Yellow Sapphire
7.55 Carat Natural Loose Parti Tourmaline Emerald Shape Gemstone
Located in Peshawar, PK
Faceted Parti Colour Tourmaline Weight: 7.55 Carat Dimension: 14.5 x 8.6 x 6.8 Mm Colour: Black, Green, Blue Seafoam And Light Seafoam Origin: Afghanistan Treatment: Non Certifi...
Tourmaline, Other
Faceted rainbow sheen moonstone, 3.35 cts
By True Gems
Located in บางรัก, TH
Faceted rainbow sheen moonstone sku121 Weight: 3.35 ct Size: 10.5x7.5x6mm Octagon cut Mining location: Madagascar Gem trend of the last few years
Moonstone
WEEK LONG CLEARANCE, 2.30 Carat Round Shape Natural Diamond No treatments
Located in Great Neck Plaza, NY
2.30 Carat Round Shape Natural Diamond Average Color H , Clarity i3 Measurement 8.3 mm stone Nice cut Excellent shine and face-up
Diamond, 14k Gold, Yellow Gold
$650Sale Price|59% Off
Certified 1.30ct Oval Paraiba Tourmaline, 7.02x5.79x4.39 mm
Located in เกาะสมุย, TH
A vibrant 1.30‑carat Mozambique Paraiba tourmaline displaying a glowing bluish‑green hue and exceptional VS1 clarity—rare for copper‑bearing material. The oval cut (7.02 × 5.79 × 4.3...
Tourmaline, Paraiba
GIA Certified 1.39ct Colombian Emerald, Octagonal Cut, Unisex, 1990
Located in Brooklyn, NY
Stone: Colombian Emerald Total Weight: 1.39 carat Shape: Octagonal Cut Clarity: Transparent Luster: Very Good Color: Medium Bluish Green Measurements: 6.93 mm x 6.47 mm x 4.55 mm G...
Emerald
GIA Certified 2.33ct Colombian Emerald, Emerald Cut, Unisex, 1990
Located in Brooklyn, NY
Stone: Colombian Emerald Total Weight: 2.33 carat Shape: Octagonal Cut Clarity: Transparent Luster: Very Good Color: Medium Bluish Green Measurements: 7.82 mm x 7.60 mm x 6.35 mm Ge...
Emerald
1.04 ct, Faceted yellow sapphire
By True Gems
Located in บางรัก, TH
Faceted yellow sapphire sku790 Weight: 1.04 cts Size: 5.4x5.6x3.2 mm Origin: Sri Lanka
Sapphire, Yellow Sapphire
1.08, Certified Unheated Natural yellow sapphire
By True Gems
Located in บางรัก, TH
Certified Unheated Natural yellow sapphire sku785 Weight: 1.08 cts Size: 6.75x5.16x3.27 mm Color: yellow
Sapphire, Yellow Sapphire
Faceted vivid green Rusisan demantoid garnet, 0.6cts
By True Gems
Located in บางรัก, TH
Faceted vivid green Rusisan demantoid garnet sku481 Weight: 0.6 ct Diameter: 5.09x5.08x3.13 mm Demantoid is the rarest and most valuable variety of the garnet group. Stones t...
Garnet
GIA Certified 53.64ct Oval Carved Double Cabochon Emerald, Green
Located in New York, NY
An oval carved double-sided cabochon emerald weighing 53.64 carats, certified by GIA (Gemological Institute of America), can be considered rare and valuable Comments: Due to their gr...
Emerald
3.15 cts, Untreated purple sapphire with a GIA certificate
By True Gems
Located in บางรัก, TH
Untreated purple sapphire with a GIA certificate sku02 Weight: 3.15 carats Size: 9.34×6.89×5.66 mm Origin: Sri Lanka
Sapphire, Purple Sapphire
WHOLESALE VALUE, 2.22 Carat Round Shape Natural Diamond No treatments
Located in Great Neck Plaza, NY
2.22 Carat Round Shape Natural Diamond Average Color I , Clarity i3 Measurement 8.3 mm stone Nice cut Excellent shine and face-up
Diamond, 14k Gold, Yellow Gold
Untreated pink sapphire with opalescence, 4.14 cts
By True Gems
Located in บางรัก, TH
Untreated pink sapphire with opalescence Weight: 4.14 ct Size: 9.91 × 8.36 × 6.24 mm GIT certificate.
Pink Sapphire
1.17 cts, Certified faceted Paraiba tourmaline
By True Gems
Located in บางรัก, TH
Certified faceted Paraiba tourmaline sku694 Weight: 1.17 cts Size: 8.66x5.18x3.29 mm Origin: Mozambique Beautiful color, good cutting, affordable price Certified GFCO
Tourmaline, Paraiba
Cushion Cut 2.47ct Grey Spinel, Unheated, Burma Jars, Art Deco Style
Located in Singapore, SG
Grey Spinel: A New Trend in Colored Stones Grey spinel radiates contemporary elegance, combining bold character with cool sophistication, a gemstone that captures both refined chic ...
Spinel
$384Sale Price / set|20% Off
3.90 Carat Natural Loose Sapphire Lot For Jewellery Making
Located in Peshawar, PK
Loose Sapphire Lot Weight: 3.90 Carats Sizes: 0.80 To 1.10 Carats Origin: Madagascar Certificate: On Customer Demand Sapphire, a gemstone of legendary beauty and enduring allure, c...
Sapphire, Other
Faceted parti sapphire, 1.55 cts
By True Gems
Located in บางรัก, TH
Faceted parti sapphire sku451 Weight: 1.55 cts Size: 6.5x5.4x4 mm Color: blue Origin: Sri Lanka Treatment Heated
Sapphire, Blue Sapphire
$2,625Sale Price|30% Off
ICA Certified Blue Green Paraiba Tourmaline 5.26 Ct Cushion Cut Loose Gemstone
Located in Peshawar, PK
Blue Green Natural Paraiba Tourmaline Cushion Cut Loose Gemstone from Mozambique – AIG Certified Blue Green Paraiba Tourmaline Stone for Pendant, Ring, Necklace, Custom Fine & De...
Tourmaline, Paraiba
5.05 cts, Rough alexandrite specimen
By True Gems
Located in บางรัก, TH
Rough alexandrite specimen sku738 Size: 14x4x4 mm Weight: 5.05 cts Can use for jewelry and put this stone into the ring or pendant Mined at Malyshevskoye deposit, Ural Mountains, Rus...
Alexandrite, Chrysoberyl, Crystal
5.40 Carat Natural Loose Bicolor Tourmaline Pair Emerald Cut Afghan Gemstone
Located in Bangkok, TH
Weight 5.40 carat Dimensions 8.6x7.0x4.9 mm Treatment None Origin Afghan Clarity SI Shape Cut Emerald Discover the beauty of this 5.40 Carat Natural Loose Bicolor Tourmaline...
Tourmaline
Faceted blue sapphire, 1.62cts
By True Gems
Located in บางรัก, TH
Faceted blue sapphire sku450 Weight: 1.62 cts Size: 7.6x5.5x3.8 mm Color: blue Origin: Sri Lanka Treatment heated, excellent cutting
Sapphire, Blue Sapphire
4.78 cts, Russian alexandrite rough crystal, chrysoberyl raw crystal
By True Gems
Located in บางรัก, TH
Russian alexandrite rough crystal, chrysoberyl raw crystal sku681 Size: 13x9.3x6 mm Weight: 4.78 cts Perfect for collection or jewelry Mined at Malyshevskoye deposit, Ural Mountains...
Alexandrite, Chrysoberyl, Crystal
0.30 ct, Faceted Russian demantoid garnet with bissolite inclusions
By True Gems
Located in บางรัก, TH
Faceted Russian demantoid garnet with bissolite inclusions sku730 !!️Tagil, Bobrovka deposit = no treatments (no heating) Weight: 0.30 ct Diameter: 3.8 mm Everyone from gemsotne w...
Garnet
Are you shopping for diamonds and other loose gemstones to create your own custom jewelry?
Why might you purchase a diamond or gemstone “loose” — that is, on its own, not mounted in a piece of jewelry? Perhaps you’re a connoisseur looking to acquire a unique investment. The scarcity of high-quality colored diamonds, for instance, especially pink diamonds, means that their value increases over time; the same is true of rare Kashmir sapphires and Burmese rubies. Far rarer than diamonds, Paraiba tourmaline, discovered only in the 1980s, is treasured as much for its extraordinary color as its scarcity, both of which contribute to its high value.
A more common scenario would be that you’re hoping to create a very special piece of custom jewelry, such as an engagement ring or a milestone-birthday present, and want to personally select the most beautiful, unusual, or ultra-rare stone you can find and afford. Doing so adds to the romance and substance of the gift and can be a part of the story told as the jewel is passed from generation to generation.
If this sounds like you, read on for tips on becoming one of the world’s savviest gem hunters.
Educate yourself: When buying any piece of gem-set fine jewelry, you should familiarize yourself with the factors that determine a stone’s price. This will enable you to streamline your search for the perfect gem and have intelligent, productive conversations with sellers.
There is a wealth of information online, such as our diamond-buying guide and this overview of colored gemstones for engagement rings. The buying guides of the Gemological Institute of America (GIA), searchable by stone type, are also a widely trusted source for consumers venturing into the world of diamonds and gems for the first time.
Vet your vendor: If you peruse 1stDibs with any regularity, you know there is no shortage of vendors who deal in top-quality loose gemstones. (Read about our vetted sellers.) Finding a trustworthy, established dealer may be as easy as getting a recommendation from friends or family. And, although it may sound obvious, it pays to Google your candidates — and consult customer reviews — before making contact.
Harakh Mehta, designer and founder of the Mumbai, India–based fine-jewelry brand Harakh, has an innate understanding of proper client relations, especially when the customer is in unfamiliar territory. “Start chatting with the dealer, get to know them better," he says. "It’s very important to establish a comfort level. We never push a sale, as we want it to be a carefully considered purchase. So, if the client is not in a rush, we do it over a few virtual meetings or phone calls.”
Request documentation: The best dealers go to great lengths to furnish clients with documents verifying the quality rating, natural origin and provenance of a stone — showing, for example, that loose emerald hails from the famous Muzo mine in Colombia — and disclosing any treatments applied to enhance its appearance. (And who doesn't love emerald jewelry? The most valuable emeralds are the ones that have a deep bluish-green to true green color and no visible inclusions.)
If no grading report is available for a stone you are interested in, the dealer should be able to provide an authenticity document, such as an appraisal or info sheet, that has been signed by an in-house gemologist or professional appraiser. Google those names, too, for extra peace of mind.
Ask for videos and visuals: When transacting with a gem dealer online, you should always request real-time videos and photographs, since professional photos of a stone, usually on a white background, have likely been retouched for optimal presentation.
Read more about how to buy loose gemstones and find your dream gems today on 1stDibs.
