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
0.51 ct, Faceted bi color tourmaline
By True Gems
Located in บางรัก, TH
Faceted bi color tourmaline sku768 Weight: 0.51 cts Size: 5.1x4.3x3.1 mm Origin: Africe 100% natural.
Tourmaline
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
2.23 cts, Certified Faceted blue pink Sapphires Pair
By True Gems
Located in บางรัก, TH
Certified Faceted sapphires opposite pair sku144 Origin: Sri Lanka Sizes: 8.98x5.55x3.22 mm, 8.76x5.48x3.13 mm Weight: 2.23 ct This pair doenst have any treatments, even normal heat...
Sapphire, Blue Sapphire, Pink Sapphire
0.52 cts, Russian demantoid garnet with obvious horsetail inclusion
By True Gems
Located in บางรัก, TH
Russian demantoid garnet with obvious horsetail inclusion sku687 !!️Tagil, Bobrovka deposit = no treatments (no heating) Weight: 0.52 cts Diameter: 4.9 mm Demantoid is the rarest ...
Garnet
114.83 cts, Rough alexandrite specimen
By True Gems
Located in บางรัก, TH
Rough alexandrite specimen sku706 Size: 40x35x20 mm Weight: 114.83 cts Can use for jewelry and put this stone into the ring or pendant Mined at Malyshevskoye deposit, Ural Mountains,...
Alexandrite, Chrysoberyl, Crystal
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
78.94 cts, Rough alexandrite specimen
By True Gems
Located in บางรัก, TH
Rough alexandrite specimen sku707 Size: 40x21x11 mm Weight: 78.94 cts Can use for jewelry and put this stone into the ring or pendant Mined at Malyshevskoye deposit, Ural Mountains, ...
Crystal, Chrysoberyl, Alexandrite
0.51 ct, Faceted bi-color tourmaline
By True Gems
Located in บางรัก, TH
Faceted bi color tourmaline sku769 Weight: 0.51 cts Size: 5.9x4.1x3.1 mm Origin: Africe 100% natural.
Tourmaline
Collectible Russian demantoid set
By True Gems
Located in บางรัก, TH
Collectible Russian demantoid set sku316 Rough demantoid 13.5 cts Faceted demantoid 0.21 ct Everyone from gemsotne world knows, that best demantoids are mining in the Urals Mountain...
Garnet
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
4.64 cts, Rare Bi-Color Cat’s Eye Green Tourmaline
By True Gems
Located in บางรัก, TH
Rare Bi-Color Cat’s Eye Green Tourmaline sku722 Weight: 4.64 cts Origin: Afghanistan One part displays an opaque tourmaline with a distinct cat’s eye phenomenon, while the other rema...
Tourmaline, Cat’s Eye
4.64 ct, Faceted Blue Tourmaline Indicolite Gemstone
By True Gems
Located in บางรัก, TH
Faceted blue tourmaline indicolite gemstone sku3 Weight: 4.64 ct Size: 9,97х7,99х6.49 mm Origin: Afghanistan, Kunar mine GFCO certified Perfect size and shape for the men ring
Tourmaline, Indicolite
2.95 Carat Natural Loose Spinel Lot For Jewellery Making
Located in Peshawar, PK
Faceted Spinel Lot Weight : 2.95 Carat Sizes: 0.60 To 0.80 Carat Origin: Tanzania Treatment: Non Certificate: On Customer Demand Spinels is a captivating gemstone prized for its...
Spinel, Other
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
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
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
1.08, 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
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
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 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
Dioptase cabochon
Located in บางรัก, TH
Dioptase cabochon sku14 From Kazahstan Size: 31х18х9 mm
Other
Set of faceted aquamarines, 4.45 cts
By True Gems
Located in บางรัก, TH
Set of faceted aquamarines sku14 Mining location: Africa Perfect for earrings and a ring Visually clean, inclusions are visible in the magnifying glass, which in itself is an excelle...
Aquamarine
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
$720Sale Price|55% 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
LIQUIDATION, 4.47 Carats Round Shape Natural Diamonds Pair No treatments
Located in Great Neck Plaza, NY
4.47 Carats Round Shape Natural Diamonds Pair No treatments Average Color I-j Clarity i3 Measurement 8.3mm stone
Diamond, 14k Gold, Yellow Gold
4.26 cts, Rough alexandrite specimen
By True Gems
Located in บางรัก, TH
Rough alexandrite specimen sku736 Size: 10x8x6 mm Weight: 4.26 cts Can use for jewelry and put this stone into the ring or pendant Mined at Malyshevskoye deposit, Ural Mountains, Rus...
Alexandrite, Chrysoberyl, Crystal
3.10 Carat Natural Loose Spinel Lot Gemstone For Jewellery
Located in Peshawar, PK
Faceted Spinel Lot Weight : 3.10 Carat Sizes: 0.55 To 0.70 Carat Origin: Tanzania Treatment: Non Certificate: On Customer Demand Spinels is a captivating gemstone prized for its...
Spinel, Other
0.52 ct, Faceted pink round tourmaline
By True Gems
Located in บางรัก, TH
Faceted pink round tourmaline sku667 Weight: 0.52 ct Diameter: 5.3 mm Color: pink Origin: Afghanistan
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
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
37.34 cts, Rough alexandrite specimen
By True Gems
Located in บางรัก, TH
Rough alexandrite specimen sku744 Size: 18x14x12 mm Weight: 37.34 cts Can use for jewelry and put this stone into the ring or pendant Mined at Malyshevskoye deposit, Ural Mountains, ...
Alexandrite, Chrysoberyl, Crystal
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
16.3 cts, Oval coral fossil cabochon
Located in บางรัก, TH
Oval coral fossil cabochon sku401 Weight: 16.3 cts Size: 26x20x3 mm Origin: Indonesia
Coral
5.45 ct, Vivid green high quality Faceted peridote
By True Gems
Located in บางรัก, TH
Vivid green high quality Faceted peridote sku90 Weight: 5.45 carats Size: 9.3x8.2x7.1 mm Mining location: Pakistan Octagon cut
Peridot
WEEK LONG CLEARANCE, 2.22 Carat Round Shape Natural Diamond No treatments
Located in Great Neck Plaza, NY
2.22 Carat Round Shape Natural Diamond Average Color j , Clarity i3 Measurement 8.3 mm stone Nice cut Excellent shine and face-up
Diamond, 14k Gold, Yellow Gold
$1,000Sale Price|20% Off
39.85 Carat Natural Loose Swiss Blue Topaz Stone Cushion Cut African Gemstone
Located in Bangkok, TH
Weight 39.85 carat Dimensions 21.0x15.4x12.7 mm Treatment None Origin African Clarity Loup Clean Shape Cut Cushion This 39.85 Carat Natural Loose Swiss Blue Topaz is an ex...
Topaz, Blue Topaz
17.4 ct, Rough shungite specimen
By True Gems
Located in บางรัก, TH
Rough shungite specimen sku684 Size: 24x20x4 mm Weight: 17.4 ct Origin: Kola Peninsula, Russia
Crystal
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
5.15 Carat Natural Loose Spinel Lot Gemstone For Jewellery Making
Located in Peshawar, PK
Faceted Spinel Lot Weight : 5.15 Carat Sizes: 0.60 To 0.85 Carat Origin: Tanzania Treatment: Non Certificate: On Customer Demand Spinels is a captivating gemstone prized for i...
Spinel, Other
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
2.8 cts, Vivid pink Mahenge oval spinel
By True Gems
Located in บางรัก, TH
Vivid pink Mahenge oval spinel sku647 Weight: 2.8 cts Color: vivid pink Size: 9.68x7.23x5.16 mm Purity: Sl Gemologists call such gemstones ‘master stones’ because of their size an...
Spinel
Certified 4.08 Ct. Natural Rhodolite Garnet loose gemstone, Cushion cut
By GRALJEWELRY
Located in Dublin, D
Natural Rhodolite Garnet loose gemstone Laboratory certified GFCO Gemstone Color: VIVID PINK-PURPLE Gemstone Type: Garnet Rhodolite Gemstone size: 9.38x8.04x6.05 mm Cut Grade: Excel...
Garnet
Rare burmese zircon set, 5.5 cts
By True Gems
Located in บางรัก, TH
Rare burmese zircon set sku598 1.93 heart 6.3x7x4 mm 3.56 cts cushion 7.5x7.5x6.5 mm
Zircon
GIA Certified .67 Carat Alexandrite Oval Loose Gemstone for Ring or Pendant
Located in Los Angeles, CA
Alexandrites are referred to as "phenomenal" stones because they exhibit the "phenomena" of changing color depending on the light they are seen in. In daylight or fluorescent light, ...
Alexandrite, Chrysoberyl
5.50 Carat Natural Loose Tri Colour Tourmaline Pair Emerald Shape Gemstone
Located in Peshawar, PK
Faceted Tri Colour Tourmaline Pair Weight: 5.50 Carat Sizes: 2.60 And 2.80 Carat Colour: Black, Light Pink And Baby Pink Origin: Afghanistan Treatment: Non Certificate: On Cust...
Tourmaline, Other
Watermelon tourmaline slice, 9.8 cts
Located in บางรัก, TH
Watermelon tourmaline slice sku196 Weight: 9.8 cts
Tourmaline
$2,760Sale Price|25% Off
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...
Sapphire, Blue Sapphire
25.93 ct, Rough shungite specimen
By True Gems
Located in บางรัก, TH
Rough shungite specimen sku683 Size: 27x20x4 mm Weight: 25.93 ct Origin: Kola Peninsula, Russia
Crystal
102.6 cts, Rough alexandrite specimen
By True Gems
Located in บางรัก, TH
Rough alexandrite specimen sku705 Size: 40x25x20 mm Weight: 102.6 cts Can use for jewelry and put this stone into the ring or pendant Mined at Malyshevskoye deposit, Ural Mountains, ...
Crystal, Chrysoberyl, Alexandrite
Faceted white sapphire octagon pair, 0.29 cts
By True Gems
Located in บางรัก, TH
Faceted white sapphire octagon pair sku308 Color: white Size: 4x2 mm Weight: 0.29 cts Sri Lanka Perfect for use as side stones — see the last photo for an example.
Sapphire
Natural 1.01 carat Unheated Peach color Spinel, cushion Cut Gemstone
Located in Brooklyn, NY
This pretty rare Peach color spinel Cushion cut , weighs 1.01 carats and would make a beautiful 3-stone ring, though its shape lends itself to a variety of possibilities! It measures...
Spinel
3.80 Carat Natural Loose Blue Tourmaline Cushion Shape Gemstone
Located in Peshawar, PK
Faceted Blue Tourmaline Weight: 3.80 Carat Dimension: 10.5 x 8.3 x 6.0 Mm Colour: Blue Origin: Afghanistan Treatment: Non Certificate: On Customer Demand Tourmaline is a capt...
Tourmaline, Other
6.10 Carat Natural Loose Seafoam Tourmaline Cushion Shape Gemstone
Located in Peshawar, PK
Faceted Seafoam Tourmaline Weight: 6.10 Carat Dimension : 10.4 x 10 x 7.8 Mm Origin: Afghanistan Colour: Seafoam Treatment: Non Certificate: On Customer Demand Tourmaline is a...
Tourmaline, Other
0.075 ct, Tiny vivid green faceted Russian demantoid garnet
By True Gems
Located in บางรัก, TH
Tiny vivid green faceted Russian demantoid garnet sku723 !!️Tagil, Bobrovka deposit = no treatments (no heating) Weight: 0.075 ct Diameter: 2.3 mm Everyone from gemsotne world kno...
Garnet
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
Fine 7MM Square Cushion Cut Tanzanite - Loose Gemstone
Located in New York, NY
A captivating 1.65 carat cushion-cut Tanzanite, measuring 7 mm with beautifully balanced proportions. Its soft pillow silhouette frames a rich violet-blue interior that shifts betwee...
Tanzanite
4.90 Carat Natural Loose Burmese Red Spinel Gemstone For Jewellery Making
Located in Peshawar, PK
Faceted Spinel Lot Weight: 4.90 Carat Sizes: 0.90 To 1.40 Carat Colour: Red Shape: Cushion Origin: Myanmar (Burma) Treatment: None Certificate: On Customer Demand Spinel is a cap...
Spinel, Other
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
GIA Certified #5231058390 No Heat Ceylon Cabochon Sapphire Weighing 17.16 carat
By OGI Ltd
Located in New York, NY
Introducing a Magnificent GIA Certified No Heat Ceylon Cabochon Sapphire Dazzle and amaze with this exquisite GIA Certified #5231058390 No Heat Ceylon Cabochon Sapphire, a true gem o...
Sapphire, Blue Sapphire
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.
