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
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
13.7 ct, Faceted kunzite
By True Gems
Located in บางรัก, TH
Faceted kunzite sku792 Weight: 13.7 ct Origin: Afghanistan
Kunzite
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
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
1.28 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
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
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
2.20 Carat Natural Loose Grey Spinel Emerald Shape 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
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
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
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
4.28 cts, Certified faceted Paraiba tourmaline
By True Gems
Located in บางรัก, TH
Certified faceted Paraiba tourmaline sku693 Weight: 4.28 cts Size: 10.93x8.74x6.63 mm Origin: Mozambique Beautiful color, good cutting, affordable price Certified GFCO
Tourmaline, Paraiba
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
2.42 cts, Faceted pink tourmaline
By True Gems
Located in บางรัก, TH
Faceted pink tourmaline sku753 Weight: 2.42 cts Size: 7.65x6x5.9 mm Cushion cut Origin: Afghanistan
Tourmaline
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
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 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
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
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
3.60 Carat Natural Loose Seafoam Tourmaline Gemstone
Located in Peshawar, PK
Faceted Seafoam Tourmaline Weight: 3.60 Carat Dimension: 9 x 8.4 x 6.3 Mm Colour: Seafoam Blue Origin: Afghanistan Treatment: Non Certificate: On Customer Demand Tourmaline i...
Tourmaline, Other
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
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
2.49 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
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 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
79 cts, Large larimar cabochon
Located in บางรัก, TH
Large larimar cabochon sku403 Weight: 79 cts Size: 38x32x4 mm Origin: Dominic republic
Larimar
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
0.58 ct, Faceted Russian demantoid garnet
By True Gems
Located in บางรัก, TH
Faceted Russian demantoid garnet sku801 !!️Tagil, Bobrovka deposit = no treatments (no heating) Weight: 0.58 ct Diameter: 5.28 x 3.03 mm Everyone from gemsotne world knows, that bes...
Garnet
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
$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
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
$46,850,173 / item
3.01 ct Oval Natural Diamond, D, VS1, Excellent Cut
Located in Dubai, AE
This 3.01-carat oval natural loose diamond is ideal for engagement rings and fine jewelry, featuring a brilliant D color grade, VS1 clarity, and GIA certification that you can verify...
Diamond, White Diamond
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 j , Clarity i3 Measurement 8.3 mm stone Nice cut Excellent shine and face-up
Diamond, 14k Gold, Yellow Gold
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 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
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
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
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
7.10 Carat Natural Loose Fire Effect Sphene Cushion Cut Madagascar's Gemstone
Located in Bangkok, TH
Weight 7.10 carat Dimensions 13.1x9.6x6.9mm Treatment None Origin Madagascar Clarity VVS Shape Cut Cushion AG102 Elevate your fine jewelry collection or investment portfolio with this breathtaking 7.10-carat natural loose cushion-cut sphene from Madagascar. Famed for an intense optical display...
Other
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
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
3.95 Carat Natural Loose Pink Tourmaline Emerald Shape Gemstone
Located in Peshawar, PK
Faceted Pink Tourmaline Weight: 3.95 Carat Dimension: 11.9 x 7 x 5.7 Mm Colour: Pink Origin: Afghanistan Treatment: Non Certificate: On Customer Demand Tourmaline is a capti...
Tourmaline, Other
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
Faceted pink sapphire, 0.73 cts
By True Gems
Located in บางรัก, TH
Faceted pink sapphire sku207 Weight: 0.73 cts Size: 5.40 x 5.39 x 3.69 mm Color: pink Deposit: Sri Lanka This stone has gone through a full cycle with us from extraction of raw mat...
Sapphire, Pink Sapphire
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
Lilac untreated sapphire with a GIA certificate
By True Gems
Located in บางรัก, TH
Lilac untreated sapphire with a GIA certificate Weight: 5.04 cts Size: 9.5х8.72х6.49 mm Origin: Sri Lanka
Sapphire
$300Sale Price|50% Off
Certified 1.25ct Marquise Burma Pink Spinel, 5.08x9.79x3.25 mm
Located in เกาะสมุย, TH
A vivid 1.25ct natural Burma pink spinel, certified by GLC, showcasing a clean VS1 clarity and an elegant marquise mixed cut. The stone displays a bright, saturated pink with excelle...
Spinel
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
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
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
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
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
Natural Madagascar Sphene (Titanite) 23.45 Carat – Cushion Cut Rainbow Fire
Located in Peshawar, PK
Bring extraordinary brilliance to your gemstone collection with this Natural Madagascar Sphene (Titanite) weighing 23.45 carats. Expertly precision cut into a striking rectangular fa...
Other
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
1 ct, Faceted Russian demantoid garnet set
By True Gems
Located in บางรัก, TH
Faceted Russian demantoid garnet set sku734 ‼️Tagil, Bobrovka deposit = no treatments (no heating) Weight: 1 ct Everyone from gemsotne world knows, that best demantoids are mining...
Garnet
Fine Natural Aquamarine Beryl 3.17 Carat – Madagascar – Collector Quality Gem
Located in Peshawar, PK
Experience the elegance of this natural Aquamarine gemstone, weighing an impressive 3.17 carats and sourced from the renowned gemstone regions of Madagascar. Known for its rich, deep...
Aquamarine
$3,589,976 / item
Rare Gemstone for Collectible Jewelry Making: 32.92 ct Alexandrite
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
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.
