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
4.32 cts, Rough alexandrite specimen
By True Gems
Located in บางรัก, TH
Rough alexandrite specimen sku737 Size: 15x7x4 mm Weight: 4.32 cts Can use for jewelry and put this stone into the ring or pendant Mined at Malyshevskoye deposit, Ural Mountains, Rus...
Alexandrite, Chrysoberyl, Crystal
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
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
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
1.08, 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
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
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
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
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
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
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
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 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
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
71.10 Cts, Collectible Russian alexandrite specimen
By True Gems
Located in บางรัก, TH
Collectible Russian alexandrite specimen sku806 Size: 30.7 x 28.4 x 14.7 mm Weight: 71.10 ct Can use for jewelry and put this stone into the ring or pendant Mined at Malyshevskoye de...
Alexandrite, Chrysoberyl, Crystal
4.56 cts, Rough alexandrite specimen
By True Gems
Located in บางรัก, TH
Rough alexandrite specimen sku739 Size: 10x5x4 mm Weight: 4.56 cts Can use for jewelry and put this stone into the ring or pendant Mined at Malyshevskoye deposit, Ural Mountains, Rus...
Alexandrite, Chrysoberyl, Crystal
6.99 cts, Rough alexandrite specimen
By True Gems
Located in บางรัก, TH
Rough alexandrite specimen sku741 Size: 16x11x5 mm Weight: 6.99 cts Can use for jewelry and put this stone into the ring or pendant Mined at Malyshevskoye deposit, Ural Mountains, Ru...
Alexandrite, Chrysoberyl, Crystal
13.7 ct, Faceted kunzite
By True Gems
Located in บางรัก, TH
Faceted kunzite sku792 Weight: 13.7 ct Origin: Afghanistan
Kunzite
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
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
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
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
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
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
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
1.36 cts, Certified Unheated Natural yellow sapphire
By True Gems
Located in บางรัก, TH
Certified Unheated Natural yellow sapphire sku783 Weight: 1.36 cts Size: 8.64x7.29x4.07 mm Color: yellow
Sapphire, Yellow Sapphire
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
34.05 Cts, Collectible Russian alexandrite specimen
By True Gems
Located in บางรัก, TH
Collectible Russian alexandrite specimen sku810 Size: 18.9 x 18.6 x 14.5 mm Weight: 34.05 ct Can use for jewelry and put this stone into the ring or pendant Mined at Malyshevskoye de...
Alexandrite, Chrysoberyl, Crystal
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
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
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
1.71 ct, Certified faceted Paraiba tourmaline
By True Gems
Located in บางรัก, TH
Certified faceted Paraiba tourmaline sku771 Size: 7.9x7.4x4 mm Weight: 1.71 ct Origin: Mozambique
Tourmaline, Paraiba
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
1.28 cts, Faceted oval blue sapphire
By True Gems
Located in บางรัก, TH
Faceted oval blue sapphire sku775 Weight: 1.28 cts Size: 6.5x5.5x3.4 mm Color: blue Origin: Sri Lanka
Blue Sapphire
2Ct SSEF Certificate Burma Ruby Pigeon Unheated Gemstone
Located in bangkok, TH
GG81: 2ct SSEF certified Burma ruby Pigeon blood unheated Mogok Gemstone GEM DESCRIPTION Species: Natural Corumdum Variety: Natural Unheated Burma Mogok Ruby Weight: 2ct Color...
Ruby
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
Dioptase cabochon
Located in บางรัก, TH
Dioptase cabochon sku14 From Kazahstan Size: 31х18х9 mm
Other
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
43.30 Cts, Collectible Russian alexandrite specimen
By True Gems
Located in บางรัก, TH
Collectible Russian alexandrite specimen sku808 Size: 29.6 x 16.5 x 11.7 mm Weight: 43.30 ct Can use for jewelry and put this stone into the ring or pendant Mined at Malyshevskoye de...
Alexandrite, Chrysoberyl, Crystal
$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
$3,567,400 / item
32.92 ct color-change natural chrysoberyl Alexandrite loose stone
Located in Dubai, AE
This 32.92-carat natural chrysoberyl alexandrite is a rare loose gemstone suitable for custom jewelry making and serious gem collecting. It has a documented color-change effect from ...
Alexandrite, Chrysoberyl
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
Natural Lagoon Tourmaline 2.50 Carat Emerald Cut Loose Gemstone for Ring
Located in Peshawar, PK
Lagoon Natural Afghan Tourmaline Loose Gemstone – Emerald Cut Earth Mined Greenish Lagoon Blue Tourmaline from Kunar, Afghanistan, Premium Faceted Gem for Engagement Ring, Pendant, E...
Tourmaline
8.57 cts, Rough alexandrite specimen
By True Gems
Located in บางรัก, TH
Rough alexandrite specimen sku742 Size: 17x14x3 mm Weight: 8.57 cts Can use for jewelry and put this stone into the ring or pendant Mined at Malyshevskoye deposit, Ural Mountains, R...
Alexandrite, Chrysoberyl, Crystal
18.47 cts, Rough alexandrite specimen
By True Gems
Located in บางรัก, TH
Rough alexandrite specimen sku743 Size: 22x11x6 mm Weight: 18.47 cts Can use for jewelry and put this stone into the ring or pendant Mined at Malyshevskoye deposit, Ural Mountains, R...
Alexandrite, Chrysoberyl, Crystal
1.14ct Vietnam Blue Spinel Heart Shape (7x6.3x3.5mm)
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
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
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 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
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
1.60 Carat Natural Loose Teal Color Sapphire Stone Cushion Cut Madagascar's Gem
Located in Bangkok, TH
Weight 1.60 carat Dimensions 7x6.5x3.9mm Treatment None Origin Madagascar Clarity VVS Shape Cut Cushion This beautiful 1.60-carat natural Teal Sapphire from Madagascar showc...
Sapphire
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
Faceted cushion Spessartite Orange Garnet
By True Gems
Located in บางรัก, TH
Faceted Fanta color spessartite garnet sku4 Very nice bright color and cutting, was recut from a bigger oval piece, last picture how it looked before . Now it is cushion cut Weight: ...
Garnet
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
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
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
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.
