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Loose Gemstones

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Loose Gemstones For Sale
5.95 Carat Natural Loose Bi Colour Citrine Emerald Shape Gemstone
Located in Peshawar, PK
Loose Bi Colour Citrine Weight: 5.95 Carats Dimension: 12.8 x 9.5 x 7.1 Mm Origin: Brazil Treatment: Non Certficate: On Demand Shape: Emerald Citrine, a radiant and versatile gem...
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Citrine

Hand Carved 50.14 Carats Natural Arizona Turquoise Siamese Fish Loose Gemstone
Located in Jaipur, Rajasthan
Our one-of-a-kind hand-carved Siamese fish on natural Arizona Turquoise is an extraordinary work of art created by our expert lapidary artist in Jaipur. With unparalleled skill and m...
Category

21st Century and Contemporary Indian Contemporary Loose Gemstones

Materials

Turquoise

No Heat Pear Burma Ruby Carats 5.73
Located in Hong Kong, HK
(Our code R 803) A deep red stone of Burmese origin and well shaped and a large face. It is natural with no treatment and not heated. It is accompanied by a certificate from the ...
Category

21st Century and Contemporary Hong Kong Contemporary Loose Gemstones

Materials

Ruby

34.25 Carat Aquamarine Emerald-Cut Unset Loose 3-Stone Ring Gemstone
Located in Jaipur, IN
34.25 Carat Aquamarine Emerald-Cut Unset Loose 3-Stone Ring Gemstone Length: 13.39 mm Width: 27.57 mm Height: 11 mm Note: We can make any custom jewelry...
Category

2010s Unknown Artisan Loose Gemstones

Materials

Aquamarine

Pinkish Hue Red Natural Ruby Ring Loose Gemstone 5.90 Ct Cabochon for Jewelry
Located in Peshawar, PK
Pinkish Hue Red Natural Ruby Cabochon Loose Gemstone for Ring, Necklace Pendant, Bracelet or any other Jewelry Setting!! 💎 GEMSTONE TYPE: Ruby ⚖️ WEIGHT: 5.90 Carats 🪚 SHAPE & CUT...
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Ruby

Hakimoto by Jewel of Ocean Pair of 17.5mm White Round Australian South Sea Pearl
Located in Hicksville, NY
Hakimoto By Jewel Of Ocean Round South Sea Pearl Pair of 17.5 mm White 16.7 Grams Australian South Sea Pearl Aproximate
Category

1990s American Modern Loose Gemstones

Materials

Cultured Pearl, South Sea Pearl

3.25 Carat Natural Loose Pink Tourmaline Round Shape Gem For Jewellery
Located in Peshawar, PK
Loose Pink Tourmaline Weight: 3.25 Carats Dimension: 9.3 x 9.3 x 6.6 Mm Colour: Pink Origin: Afghanistan Certificate: On Demand Treatment: Non ...
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Tourmaline

Mint Green Tourmaline Cushion Loose Gemstone For Custom Luxury Jewelry - Merkaba
Located in Beverly Hills, CA
Vibrant 3.46-Carat Mint Green Tourmaline Cushion Loose Gemstone – Merkaba Jewelry Beverly Hills. Introducing the exquisite 3.46-Carat Mint Green Tourmaline Cushion Loose Gemstone, a...
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

1.48 Carat Cushion Shaped Loose Unset Unmounted Red Spinel Gemstone
Located in Los Angeles, CA
This lovely red spinel is the color of the finest ruby at a fraction of the price! Spinel is a prized gemstone in its own right, and for good reason. It comes in a rainbow of strikin...
Category

15th Century and Earlier Antique Loose Gemstones

Materials

Spinel

Natural Mexican Fire Opal 5.45 Carat Emerald Cut Loose Gemstone Play-of-Color
Located in Aliso Viejo, CA
Ignite your collection with the captivating brilliance of this 5.45 carat Natural Mexican Fire Opal, expertly cut into a emerald cut to maximize its radiance. Sourced from Mexico, th...
Category

21st Century and Contemporary Contemporary Loose Gemstones

Materials

Emerald, Opal, Fire Opal

Natural Unheated Red Mozambique Ruby Gemstone 1.32 carats with GIA Report
Located in Los Angeles, CA
Indulge in the timeless elegance of a 1.32 carats Mozambique Ruby, meticulously certified by GIA. Its cushion shape and brilliant/step cut epitomize sophistication, accentuating its ...
Category

21st Century and Contemporary Mozambican Loose Gemstones

Materials

Ruby

Exquisite 1.72ct Ideal Cut Pear-Shaped Diamond - GIA Certified
Located in רמת גן, IL
Exquisite 1.72ct Ideal Cut Pear-Shaped Diamond - GIA Certified This exquisite 1.72ct pear-shaped diamond is the perfect choice for any jewelry setting, combining timeless elegance w...
Category

2010s Israeli Loose Gemstones

Materials

Diamond

6.95 Carat Natural Loose Amethyst Emerald Shape Gem For Necklace
Located in Peshawar, PK
Loose Amethyst Weight: 6.95 Carats Dimension: 13.2 x 8.7 x 8.2 Mm Colour: Purple Origin: Brazil Treatment: Non Certificate: On Demand Shape: Emerald Amethyst, a stunning variety of...
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

Huge Loose 125.40 Carat Natural Clear Crystal Quartz for Necklace Jewelry
Located in Peshawar, PK
Loose Crystal Quartz Weight : 125.40 Carats Dimensions : 32x32x23 Mm Origin : Brazil Clarity : AAA Eye Clean Shape: Round Shape Facet: Flower Cut Certificate: On Demand Treatment: Non Color: Colorless Quartz crystal is a power stone that's prized as a healing stone...
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Crystal, Quartz, Rock Crystal

Rare Neon Bluish Green Bicolor Natural Tourmaline Gemstone, 2.25 Ct Emerald Cut
Located in Peshawar, PK
GEMSTONE TYPE: Tourmaline PIECE(S): 1 WEIGHT: 2.25 Carats SHAPE: Step Emerald SIZE (MM): 9.84 x 5.37 x 5.02 COLOR: Neon Bluish Green Bicolor CLARITY: Approx 95% Eye Clean TREATMENT:...
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Natural Loose Diamond 0.50 Carat J SI2 Marquise Engagement Closeouts
Located in New York, NY
ITEM DESCRIPTION ID #: 54109 Stone Shape: Marquise Diamond Weight: 0.50CT Clarity: SI2 Color: J-K Measurements 8.18x4.20x2.46mm Our Price: $550 These genuine diamonds are graded ap...
Category

15th Century and Earlier Antique Loose Gemstones

Materials

White Diamond

8x6mm Emerald Faceted Cut Natural Pink Morganite Loose Gemstone AA+ Morganite
Located in New York, NY
Discover the alluring beauty of pink morganite gemstones at Blue Star Gemstones. Our collection features a variety of shapes, colors, and price points to suit every taste and budget....
Category

21st Century and Contemporary Mozambican Loose Gemstones

Materials

Morganite

0.72ct Oval Cabochon Gray Opal from Australia
Located in Toronto, Ontario
Description: Gem Type: Opal Number of Stones: 1 Weight: 0.72 cts Measurements: 8.07 x 6.20 x 2.15 mm Shape: Oval Cutting Style: Cabochon Cutting Style Crown: Cutting Style Pavilio...
Category

2010s Australian Loose Gemstones

Materials

Opal

6.84 Carats Green Tourmaline Oval Faceted Cut stone For Jewelry Natural Gemstone
Located in Jaipur, RJ
6.84 Carats Green Tourmaline Oval Faceted Cut stone For Jewelry Natural Gemstone Gemstone - Tourmaline Weight- 6.84 Carats Shape - Oval Size - 13.5x12x6 MM Pieces - 1
Category

21st Century and Contemporary Nigerian Art Deco Loose Gemstones

Materials

Tourmaline

Sapphire Blue Emerald cut Gemstone 3.29 cts.
Located in New York, NY
Sapphire Blue Emerald cut Gemstone 3.29 cts. • Carat Weight: 3.29 cts. • Measurement: 8.98 x 7.01 x 5.17 • Color: Blue • Shape: Rectangle • Cutting Style: Emerald cut • Origin: Burm...
Category

2010s Burmese Loose Gemstones

Materials

Emerald

2.55 Ct Oval Vivid Fanta Orange Spessartite / Spessartine Garnet
Located in Toronto, Ontario
Description: Gem Type: Spessartite Garnet Number of Stones: 1 Weight: 2.55 cts Measurements: 8.28x6.71x4.44 mm Shape: Oval Cutting Style Crown: Modified Brilliant Cut Cutting Style ...
Category

2010s Nigerian Loose Gemstones

Materials

Garnet

Rare Huge Blue Topaz Pear Faceted Stone Natural Loose Gemstone
Located in Jaipur, RJ
1 piece 133.80Ct Weight 30x43 mm Size
Category

2010s Brazilian Art Deco Loose Gemstones

Materials

Topaz, Blue Topaz

6.56ct Pink Unheated Natural Sapphire Cushion Cut GIA Certified
Located in New York, NY
6.56ct Pink Unheated Natural Sapphire Cushion Cut. Incredibly beautiful gemstone, intense pink color, excellent cut Design with us a unique, ...
Category

2010s Unknown Loose Gemstones

Materials

Sapphire

5.35 Carats Natural Apple Green Loose Peridot Gem From Suppart Valley Mine
Located in Peshawar, PK
Loose Peridot Weight: 5.35 Carats Dimension: 12.4x10.5x5.6 Mm Origin: Suppat Valley Mansehra Pakistan Color: Green Shape: Oval Treatment: Non Certificate: On Customer Demand Peri...
Category

21st Century and Contemporary Pakistani Arts and Crafts Loose Gemstones

Materials

Peridot

Natural 3.33 Ct Crystal Australian Opal Carved Opal mined by Sue Cooper
Located in BELCONNEN, ACT
This beautiful 3.33 Ct Australian wood replacement opal was mined by Sue Cooper at her Russells opal mine in western Queensland, Australia in 2021. Sue...
Category

2010s Australian Loose Gemstones

Materials

Crystal, Opal

1.24 Carat Oval Loose Unset Ruby Gemstone
Located in Los Angeles, CA
This pretty ruby has a rich red color and is the perfect size for a classic 3-stone ring! Weighing 1.24 carat, it measures 6.81 x 4.85 millimeters and has beautiful proportions. The ...
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Ruby

3.35 Carat Natural Loose Amethyst Emerald Shape Gem For Jewellery Making
Located in Peshawar, PK
Loose Amethyst Weight: 3.35 Carats Dimension: 10.2 x 8.6 x 6.1 Mm Colour: Purple Origin: Brazil Treatment: Non Certificate: On Demand Shape: Emerald Amethyst, a stunning variety of...
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

1.51 Carat Loose Padparadscha Sapphire, Cushion Cut GIA Graded Solitaire
Located in Greensboro, NC
Shape/Cut: Cushion Color: Orangy Pink Treatment: Heating Dimensions (mm): 6.76 x 5.73 x 4.13 Weight: 1.51ct GIA Report Number: 2195828370 Please check out the enlarged pictur...
Category

20th Century Unknown Loose Gemstones

Materials

Sapphire

Natural Unheated Violet Sapphire Stone 2.06 carats with GIA Report / JupiterGem
Located in Los Angeles, CA
Discover the enchanting beauty of this natural unheated violet sapphire, weighing 2.06 carats. With its vivid violet hue and classic round shape, this gemstone is perfect for creatin...
Category

21st Century and Contemporary Unknown Loose Gemstones

Materials

Sapphire

2.45 Carats Natural Loose Citrine Emerald Shape Gem From Earth Mine
Located in Peshawar, PK
Loose Citrine Weight: 2.45 Carats Dimension: 8.9 x 7.7 x 5.7 Mm Origin: Brazil Colour: Honey Brown Treatment: Non Certficate: On Demand Shape: Emerald Citrine, a radiant and versa...
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Citrine

Exquisite 11.10 Carat Natural Loose Blue Green Tourmaline Cushion Shape Gemstone
Located in Peshawar, PK
Loose Bluish Green Tourmaline Weight: 11.10 Carats Dimension: 16 x 11.6 x 7.5 Mm Colour: Bluish Green Origin: Afghanistan Certificate: On Demand Treatment: Non Shape: Cushion Tou...
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Tourmaline

6.95 Carat Star Ruby Loose Gemstone Oval 11.5 x 9.4 mm
Located in Columbus, OH
NNJ Designs presents a 6.95 carat oval Star Ruby loose gemstone! A Star Ruby is a type of gemstone that displays a six-rayed star when light is shone onto it. Star rubies are unique ...
Category

2010s American Art Deco Loose Gemstones

Materials

Ruby, Star Ruby

4.22 Ct Ruby Oval Loose Gemstone
Located in Fort Lee, NJ
An exquisite red color birthstone for July, believed to convey a status of power & wealth. Explore vibrant collection of Emerald, Ruby & Sapphires in our store available as a loose ...
Category

2010s Malagasy Loose Gemstones

Materials

Ruby

3.72 Ct Ruby Oval Loose Gemstone
Located in Fort Lee, NJ
An exquisite red color birthstone for July, believed to convey a status of power & wealth. Explore vibrant collection of Emerald, Ruby & Sapphires in our store available as a loose ...
Category

2010s Malagasy Loose Gemstones

Materials

Ruby

3.50 Ct Ruby Oval Loose Gemstone
Located in Fort Lee, NJ
An exquisite red color birthstone for July, believed to convey a status of power & wealth. Explore vibrant collection of Emerald, Ruby & Sapphires in our store available as a loose ...
Category

2010s Malagasy Loose Gemstones

Materials

Ruby

3.06 Ct Ruby Oval Loose Gemstone
Located in Fort Lee, NJ
An exquisite red color birthstone for July, believed to convey a status of power & wealth. Explore vibrant collection of Emerald, Ruby & Sapphires in our store available as a loose ...
Category

2010s Malagasy Loose Gemstones

Materials

Ruby

2.15 Carat Natural Loose Green Tourmaline Cushion Shape Gem For Jewellery Making
Located in Peshawar, PK
Loose Green Tourmaline Weight: 2.15 Carats Dimension: 6.9 x 7.2 x 5.5 Mm Colour: Green Origin: Afghanistan Certificate: On Demand Treatment: Non Tourmaline is a captivating gemstone...
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Tourmaline

23.60 Carats Natural Loose Purple Amethyst Emerald Cut Gemstone
Located in Brisbane, AU
Faceted Amethyst Weight: 23.60 Carats Dimension: 22x12.6x11.4 Mm Origin: Brazil Color: Purple Treatment: Non Certificate: On Customer Demand Every OHLIGUER jewel is custom made to ...
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

2.31 Ct Emerald Octagon Loose Gemstone
Located in Fort Lee, NJ
With a vibrant green color hue, the birthstone for May is a symbol of renewed spring growth. Explore vibrant collection of Emerald, Ruby & Sapphires in our store available as a loo...
Category

2010s Zambian Loose Gemstones

Materials

Emerald

2.23 Ct Emerald Octagon Loose Gemstone
Located in Fort Lee, NJ
With a vibrant green color hue, the birthstone for May is a symbol of renewed spring growth. Explore vibrant collection of Emerald, Ruby & Sapphires in our store available as a loo...
Category

2010s Zambian Loose Gemstones

Materials

Emerald

1.93 Ct Emerald Octagon Loose Gemstone
Located in Fort Lee, NJ
With a vibrant green color hue, the birthstone for May is a symbol of renewed spring growth. Explore vibrant collection of Emerald, Ruby & Sapphires in our store available as a loo...
Category

2010s Zambian Loose Gemstones

Materials

Emerald

1.86 Ct Emerald Octagon Loose Gemstone
Located in Fort Lee, NJ
With a vibrant green color hue, the birthstone for May is a symbol of renewed spring growth. Explore vibrant collection of Emerald, Ruby & Sapphires in our store available as a loo...
Category

2010s Zambian Loose Gemstones

Materials

Emerald

4.59tcw Light Bluish Green Colombian Emeralds - Matching Cushion Cut Pair
Located in Jupiter, FL
Stone: Emerald Total Weight: 4.59-tcw Shape: Cushion Cut Clarity: Transparent Luster: Excellent-Very Good Color: Light Bluish Green Measurements: 9.46mm x 7.09mm x 4.60mm // 9.44mm x...
Category

2010s Colombian Modern Loose Gemstones

Materials

Emerald

1.79 Ct Emerald Octagon Loose Gemstone
Located in Fort Lee, NJ
With a vibrant green color hue, the birthstone for May is a symbol of renewed spring growth. Explore vibrant collection of Emerald, Ruby & Sapphires in our store available as a loo...
Category

2010s Zambian Loose Gemstones

Materials

Emerald

2.35 Carat Natural Loose Pink Tourmaline Emerald Shape Gemstone
Located in Peshawar, PK
Loose Pink Tourmaline Weight: 2.35 Carats Dimension: 8.9 x 6.1 x 4.8 Mm Origin: Afghanistan Certificate: On Demand Treatment: Non Tourmaline is a captivating gemstone known for i...
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Tourmaline

1.73 Ct Emerald Octagon Loose Gemstone
Located in Fort Lee, NJ
With a vibrant green color hue, the birthstone for May is a symbol of renewed spring growth. Explore vibrant collection of Emerald, Ruby & Sapphires in our store available as a loo...
Category

2010s Zambian Loose Gemstones

Materials

Emerald

Pair Of Japanese Cloisonne Enamel Ojime Beads
Located in New York, NY
A pair of Japanese enamel Ojime beads. The circular shaped beads are adorned with polychrome floral, foliage and geometrical patterns made in the Cloisonne technique. Antique and Vin...
Category

19th Century Japanese Antique Loose Gemstones

Materials

Sterling Silver

4.95 Carat Natural Loose Tourmaline Lot Gemstone For Jewellery
Located in Peshawar, PK
Loose Tourmaline Lot Weight: 4.95 Carats Sizes: 0.62 To 1.80 Carat Colour: Mint Green And Seafoam Origin: Afghanistan Certificate: On Demand Treatment: Non Tourmaline is a capt...
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Tourmaline

FLASH SALE GIA 0.50 Carat Light Yellow Brilliant Marquise Shape Natural Diamond
Located in Great Neck Plaza, NY
GIA 0.50 Carat Light Yellow Brilliant Marquise Shape Natural Diamond Diamond Color: Light yellow
Category

2010s American Loose Gemstones

Materials

Diamond, Yellow Diamond, White Gold, 14k Gold

1.56 Carat Pear-Shaped Natural Sky Blue Zircon
Located in Hua Hin, TH
Sparkling Pear-cut Sky Blue Zircon This 1.56 carat Blue Zircon has an impressive fire and a pure light blue color. Giving it the "Sky Blue" Distinction. Stone Weight: 1.56 carats D...
Category

2010s Cambodian Loose Gemstones

Materials

Zircon, Blue Zircon

4.35 Carat 11.5x10 Seafoam Green Oval Colombian Emerald Loose Gemstone
Located in Jupiter, FL
Stone: Emerald Weight: 4.35-carats Shape: Oval Cut Clarity: Transparent Luster: Excellent-Very Good Color: Light Green Measurements: 11.44mm x 10.03mm x 7.46mm Geographic Origin: Col...
Category

2010s Colombian Modern Loose Gemstones

Materials

Emerald

2.70 Carat Natural Loose Smoky Hessonite Garnet Gemstone for Sell
Located in Peshawar, PK
Gemstone Type : Hessonite Garnet Weight : 2.70 Carats Dimensions : 8.3x6.8x5.1 Mm Origin : Africa Clarity : Eye Clean Shape: Shape Color: Brownish Orange Certificate: On Demand Birthstone: January Month According to Vedic astrologists, wearing a two-carat or higher hessonite garnet is said to bring wealth and success as well as promote longevity. Interestingly enough, garnet in general is well-known for being a gemstone associated with success, especially in business. Hessonites can make beautiful, inexpensive jewelry stones...
Category

21st Century and Contemporary Malagasy Artist Loose Gemstones

Materials

Garnet, Hessonite

color change Spinel 4.30 cts. from Srilanka.
Located in Brooklyn, NY
This pretty Purplish Pink spinel Cushion cut , weighs 4.30 carats and would make a beautiful 3-stone ring, though its shape lends itself to a variety of possibilities! It measures ...
Category

2010s Sri Lankan Loose Gemstones

Materials

Spinel

Light Bluish Green Natural Tourmaline Ring Gemstone 2Ct Cushion Cut for Jewelry
Located in Peshawar, PK
Light Bluish Green Natural Tourmaline Loose Gemstone for Ring, Necklace Pendant in Square Cushion Cut from Kunar Afghanistan!! 💎 GEMSTONE TYPE: Tourmaline ⚖️ WEIGHT: 2 Carat 🪚 SH...
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

1.24 Ct Blue Sapphire Cushion Loose Gemstone
Located in Fort Lee, NJ
A highly precious September birthstone with a delighting blue color. They are believed to bring good luck & fortune to life. Explore vibrant collection of Emerald, Ruby & Sapphires ...
Category

2010s Sri Lankan Loose Gemstones

Materials

Blue Sapphire

Fancy Cut Rubelite Tourmaline 2.20 Carats Tourmaline Stone for Jewellery
Located in Bangkok, TH
Fancy Cut Rubelite Tourmaline of 2.20 carats from Nigeria has a wonderful cut in a Oval shape, incredible Red color. Great brilliance. This gem is Vvs Clarity. Product Information G...
Category

21st Century and Contemporary Nigerian Modern Loose Gemstones

Materials

Rubelite, Tourmaline

13.20 Carat Natural Loose Amethyst February Birthstone Gem For Necklace
Located in Peshawar, PK
Loose Amethyst Weight: 13.20 Carats Dimension: 16.6 x 13.4 x 9.8 Mm Colour: Purple Origin: Brazil Treatment: Non Certificate: On Demand Shape: Octagon Amethyst, a stunning variety ...
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

Natural Green Sapphire Gemstone 5.54 carats / JupiterGem
Located in Los Angeles, CA
Embrace the natural beauty of this stunning green sapphire, weighing an impressive 5.54 carats. With its vivid green hue and expert craftsmanship, this Sri Lankan sapphire is an exce...
Category

21st Century and Contemporary Sri Lankan Loose Gemstones

Materials

Green Sapphire

1.58 Carat Citrine Quartz
Located in Hua Hin, TH
A fiery 1.58 carat Citrine Quartz imbued with a strong orange color. 1.58 carat Oval Orange Citrine Quartz Shape: Oval Crown: Modified Brilliant Pavili...
Category

2010s Unknown Loose Gemstones

Materials

Citrine, Quartz

1.58 Carat Citrine Quartz
1.58 Carat Citrine Quartz
$127 Sale Price
50% Off
GIA Certified 2.03 Carat Fancy Pinkish Brown VS2 Clarity Diamond
Located in บางรัก, TH
Certificate: GIA Report Number: 7468147904 Shape And Cut: Cushion Carat Weight: 2.03 carat Measurements: 6.76 x 6.82 x 4.69 mm Color Grade: Fancy Pinkish Brown FEATURES OF THE DIAM...
Category

2010s Asian Loose Gemstones

Materials

Diamond

Loose Gemstones for Sale on 1stDibs

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.

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