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Loose Gemstones

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Loose Gemstones For Sale
60.23 Carats Top Colombian Emerald Carved Cabochon For Jewelry Natural Gems
Located in Jaipur, RJ
60.23 Carats Top Colombian Emerald Carved Cabochon For Jewelry Natural Gems Gemstone - Emerald Weight - 60.23 carats Shape - Carved Cabochon Quantity - 12 Pieces
Category

21st Century and Contemporary Colombian Art Deco Loose Gemstones

Materials

Emerald

Bluish Hue Green Tourmaline 7.20 Ct Cushion Cut Natural Loose Gemstones Parcel
Located in Peshawar, PK
Natural Bluish Green Tourmaline Cushion Cut Loose Gemstone Parcel – Rare Green Hue, Brilliant Cut Natural Tourmaline for Fine Jewelry, Custom Ring, Pendant Designer Creations. ...
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Peachy Pink Natural Tourmaline Ring Loose Gemstone 3.40 Ct Cushion Cut-Jewelry
Located in Peshawar, PK
Rare Peachy Pink Natural Tourmaline Loose Gemstone for Ring, or any other Jewelry Setting Cushion Cut!! 💎 GEMSTONE TYPE: Tourmaline ⚖️ WEIGHT: 3.40 Carat 🪚 SHAPE & CUT: Cushion C...
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

3.65 Carat Natural Loose Blue Green Tourmaline Emerald Shape Gemstone
Located in Peshawar, PK
Faceted Blue Green Tourmaline Weight: 3.65 Carat Dimension: 11 x 7 x 5.3 Mm Colour: Blue Green Treatment: Non Certificate: On Customer Demand Shape: Emerald Tourmaline is a capti...
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Tourmaline

2.15 Carat Natural Loose Tsavorite Garnet Lot For Jewellery Making
Located in Peshawar, PK
Faceted Tsavorite Garnet Lot Weight: 2.15 Carat Clarity : SI Treatment: Non Certificate: On Client Demand Faceted tsavorite garnet is a stunning green gemstone known for its vivid...
Category

21st Century and Contemporary Tanzanian Arts and Crafts Loose Gemstones

Materials

Garnet, Tsavorite

3.04 Carat Unheated Vivid Red Ruby Loose Gemstone, GRS Certified By Merkaba
Located in Beverly Hills, CA
Offered loose by Merkaba Jewelry Beverly Hills, this natural 3.04 carat vivid red ruby is an exceptional collector gemstone with a powerful, saturated red presence. The ruby is unhea...
Category

21st Century and Contemporary Mozambican Contemporary Loose Gemstones

Materials

Ruby, 18k Gold, Rose Gold, White Gold, Yellow Gold, Platinum

Essence of Apple Green Peridot Stone 3.35 carats Radiant Cut Pakistani Gemstone
Located in Bangkok, TH
Weight : 3.35 carats Dimensions: 9.4x8.1x5.5 mm Clarity: Eye Clean Origin: Pakistan Treatment: None Shape: Octagonal Cut: Radiant Cut The Apple Green Peridot Stone, a radiant em...
Category

21st Century and Contemporary Pakistani Modern Loose Gemstones

Materials

Peridot

Rare 7.68 Carat Mint Green Tourmaline Cushion Cut Loose Gemstone by Merkaba
Located in Beverly Hills, CA
7.68 carat mint green tourmaline cushion cut loose gemstone curated by Merkaba Jewelry Beverly Hills. This unmounted center stone is prized for its serene mint hue, bright presence, ...
Category

21st Century and Contemporary Congolese Modern Loose Gemstones

Materials

Tourmaline, 18k Gold, Rose Gold, White Gold, Yellow Gold, Platinum

2.45 Carat Natural Loose Rubellite Tourmaline Stone Pear Cut Afghan Gemstone
Located in Bangkok, TH
Weight 2.45 carat Dimensions 10.9x7.7x3.8mm Treatment None Origin Afghan Clarity Eye Clean Shape Cut Pear This 2.45 Carat Natural Loose Rubellite Tourmaline is a vibrant gem...
Category

21st Century and Contemporary Afghan Modern Loose Gemstones

Materials

Tourmaline

1.64 Carat Natural Purple Spinel from Burma No Heat
Located in Hua Hin, TH
1.64 Carat Natural Purple Spinel from Burma Dimension: 8.37 x 5.91 x 3.52 mm Weight: 1.64 Carat Shape: Octagon Cut No Heat GIL Certified Report No; STO2022102151331
Category

2010s Burmese Loose Gemstones

Materials

Spinel

Pear Natural Australian Black Opal 0.43 ct Loose Gemstone Jewelry Making Design
Located in Suwanee, GA
Pear Natural Australian Black Opal 0.43 ct Loose Gemstone Jewelry Making Design. Free Domestic USPS First Class Shipping! Free Beautiful Gift Bag with every order! Every Opal piece...
Category

2010s American Arts and Crafts Loose Gemstones

Materials

Opal, Black Opal

2 Carat GIA Certified Fancy Deep Brown-Pink VS2 Pear Shape Diamond
Located in New York, NY
2.22 Carat Fancy Deep Brown-Pink Pear Shape Diamond VS2 Clarity Very Good, Good Cutting No Fluorescence No fluorescence GIA Certified Diamond At Rare Colors, you can experience th...
Category

2010s Loose Gemstones

Materials

Pink Diamond, Diamond

Natural Tanzanite AAAA Emerald Cut 25.47 Cts December Birthstone Loose Gemstone
Located in New York, NY
♥ Welcome to Blue Star Gems: Your stop for Natural Loose Gemstones for Jewelry making and Best Quality and affordable Gemstones for the Price you Pay We are Loose Gemstones Manufactu...
Category

21st Century and Contemporary Tanzanian Art Deco Loose Gemstones

Materials

Tanzanite

GIA Certified 6.05 Carat Ceylon No Heat Colour Change Oval Cut Blue Sapphire
Located in Kowloon, HK
Discover the unparalleled beauty of this 6.05-carat color-change sapphire, a rare gemstone originating from the legendary mines of Ceylon (Sri Lanka). Certified by the Gemological In...
Category

2010s Loose Gemstones

Materials

Blue Sapphire

6.47 Carat Paraiba Tourmaline Loose Gemstone, Oval Cut, Mozambique, GIA Certifie
Located in Beverly Hills, CA
Offered loose by Merkaba Jewelry Beverly Hills, this 6.47 carat Paraiba tourmaline from Mozambique is an extraordinary collector gemstone, presented in a refined oval cut and accompa...
Category

21st Century and Contemporary Mozambican Contemporary Loose Gemstones

Materials

Tourmaline, Paraiba, 18k Gold, Rose Gold, White Gold, Yellow Gold, Platinum

1.16 Ct Pink Sapphire Oval Loose Gemstone
Located in Fort Lee, NJ
This natural pink sapphire offers elegance and sophistication. With its rich color saturation and precise cutting, it is the perfect centerpiece for an engagement ring or luxury jewe...
Category

2010s Sri Lankan Loose Gemstones

Materials

Pink Sapphire

1.92 Ct Blue Sapphire Oval Loose Gemstone
Located in Fort Lee, NJ
This natural Blue sapphire offers elegance and sophistication. With its rich color saturation and precise cutting, it is the perfect centerpiece for an engagement ring or luxury jewe...
Category

2010s Sri Lankan Loose Gemstones

Materials

Blue Sapphire

Rare Bicolor Natural Tourmaline Ring Loose Gemstones 3.70 Ct Emerald Cut-Jewelry
Located in Peshawar, PK
Light Pink and Light Bluish Green Bicolor Natural Tourmaline Loose Gemstone – Step Emerald Cut from Afghanistan! 💎 GEMSTONE TYPE: Tourmaline ⚖️ WEIGHT: 3.70 Carats 🪚 SHAPE & CUT: ...
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

1.01 Ct GIA Certified Unheated Burma Ruby Pigeon Blood Color Gemstone No heat
Located in bangkok, TH
RMA84 1.01 Ct GIA Certified Natural Unheated Burma Ruby Pigeon Blood Color Gemstone GEM DESCRIPTION Species: Corumdum Variety: Burma Ruby Pigeon Blood Weight: 1.01 ct Color: Pigeon ...
Category

2010s Loose Gemstones

Materials

Ruby

GIA Certified 1.99 Carats Natural Diamond D / IF Triple XXX
Located in New Delhi, Delhi
An exceptional rare GIA Certified Natural Diamond of 1,99 carats, in perfect round brilliant cut , triple XXX , D color IF clarity, excellent quality, so sp...
Category

21st Century and Contemporary Loose Gemstones

Materials

Diamond

1.67 Ct Blue Sapphire Oval Loose Gemstone
Located in Fort Lee, NJ
This natural Blue sapphire offers elegance and sophistication. With its rich color saturation and precise cutting, it is the perfect centerpiece for an engagement ring or luxury jewe...
Category

2010s Sri Lankan Loose Gemstones

Materials

Blue Sapphire

3.10 Ct Blue Sapphire Oval Loose Gemstone
Located in Fort Lee, NJ
This natural Blue sapphire offers elegance and sophistication. With its rich colour saturation and precise cutting, it is the perfect centrepiece for an engagement ring or luxury jew...
Category

2010s Sri Lankan Loose Gemstones

Materials

Blue Sapphire

New 2.59ct Oval Blue Sapphire Loose Gemstone, Sri Lanka, Heat Treated
Located in Fort Lee, NJ
This natural Blue sapphire offers elegance and sophistication. With its rich color saturation and precise cutting, it is the perfect centerpiece for an engagement ring or luxury jewe...
Category

2010s Sri Lankan Loose Gemstones

Materials

Blue Sapphire

1.83 Ct Blue Sapphire Round Loose Gemstone
Located in Fort Lee, NJ
This natural Blue sapphire offers elegance and sophistication. With its rich colour saturation and precise cutting, it is the perfect centrepiece for an engagement ring or luxury jew...
Category

2010s Sri Lankan Loose Gemstones

Materials

Blue Sapphire

5.89 Ct Blue Sapphire Octagon Loose Gemstone
Located in Fort Lee, NJ
This natural Pink sapphire offers elegance and sophistication. With its rich color saturation and precise cutting, it is the perfect centerpiece for an engagement ring or luxury jewe...
Category

2010s Sri Lankan Loose Gemstones

Materials

Blue Sapphire

86.22 Carat Rough Black Diamond
Located in New York, NY
This extremely lustrous and large rough black diamond mined in Canada weighs 86.22 carats. Black diamonds owe their opaque color to natural impurities in the crystal lattice and make...
Category

2010s Canadian Loose Gemstones

Materials

Black Diamond

1.44 Ct Blue Sapphire Oval Loose Gemstone
Located in Fort Lee, NJ
This natural Blue sapphire offers elegance and sophistication. With its rich color saturation and precise cutting, it is the perfect centerpiece for an engagement ring or luxury jewe...
Category

2010s Sri Lankan Loose Gemstones

Materials

Blue Sapphire

71.19 Carat Rough Black Diamond
Located in New York, NY
This lustrous rough black diamond mined in Canada weighs a hefty 71.19 carats. Black diamonds owe their opaque color to natural impurities in the crystal lattice and make beautiful c...
Category

2010s Canadian Loose Gemstones

Materials

Black Diamond

2.56 Ct Blue Sapphire Oval Loose Gemstone
Located in Fort Lee, NJ
This natural Blue sapphire offers elegance and sophistication. With its rich color saturation and precise cutting, it is the perfect centerpiece for an engagement ring or luxury jewe...
Category

2010s Sri Lankan Loose Gemstones

Materials

Blue Sapphire

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

2010s Sri Lankan Loose Gemstones

Materials

Yellow Sapphire

AGL Certified 5.75 Carat Burma No Heat Cushion Cut Blue Sapphire Loose Stone
Located in Miami, FL
Loose AGL certified 5.75 carat no heat Burma Blue Sapphire cushion cut with rich blue color and no heat or other treatment. A premium specimen of excellent material. Measuring 11.23 ...
Category

21st Century and Contemporary Burmese Contemporary Loose Gemstones

Materials

Sapphire, Blue Sapphire

1.25 Ct Blue Sapphire Marquise Loose Gemstone
Located in Fort Lee, NJ
This natural blue sapphire offers elegance and sophistication. With its rich color saturation and precise cutting, it is the perfect centerpiece for an engagement ring or luxury jewe...
Category

2010s Sri Lankan Loose Gemstones

Materials

Blue Sapphire

1.29 Ct Blue Sapphire Oval Loose Gemstone
Located in Fort Lee, NJ
This natural Blue sapphire offers elegance and sophistication. With its rich color saturation and precise cutting, it is the perfect centerpiece for an engagement ring or luxury jewe...
Category

2010s Sri Lankan Loose Gemstones

Materials

Blue Sapphire

1.04 Ct Blue Sapphire Oval Loose Gemstone
Located in Fort Lee, NJ
This natural Blue sapphire offers elegance and sophistication. With its rich color saturation and precise cutting, it is the perfect centerpiece for an engagement ring or luxury jewe...
Category

2010s Sri Lankan Loose Gemstones

Materials

Blue Sapphire

8.76 Ct Blue Sapphire Octagon Loose Gemstone
Located in Fort Lee, NJ
This natural Pink sapphire offers elegance and sophistication. With its rich color saturation and precise cutting, it is the perfect centerpiece for an engagement ring or luxury jewe...
Category

2010s Sri Lankan Loose Gemstones

Materials

Blue Sapphire

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

2010s Sri Lankan Loose Gemstones

Materials

Yellow Sapphire

HRD Certified 1.01ct Princess-Cut Natural Diamond
Located in Esch sur Alzette, Esch-sur-Alzette
The HRD Certified 1.01ct Princess-Cut Diamond is a stunning gemstone of exceptional quality and brilliance. Certified by the prestigious HRD (Hoge Raad voor Diamant) institute, this ...
Category

21st Century and Contemporary Loose Gemstones

Materials

Diamond

Lustrous Green Chrome Sphene Gemstone: Asscher Cut Titanite, 0.55 CT
Located in Peshawar, PK
Color : Green Shape : Asscher Clarity : VVS Clean Treatment : Natural Origin : Pakistan Hardness : 5-5.5 Family : Titanite This exquisite **Sphene gemstone**, also known as **Titan...
Category

2010s Pakistani Loose Gemstones

Materials

Other

1.90 Carat Natural Loose Tricolour Tourmaline Octagon Shape Gemstone
Located in Peshawar, PK
Faceted Tricolour Tourmaline Weight: 1.90 Carat Dimension: 7.1 x 6.6 x 4.5 Mm Origin: Afghanistan Treatment: Non Certificate: On Customer Demand Tourmaline is a captivating gemsto...
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Tourmaline

47.05 Carat Huge Natural Loose Indicolite Tourmaline Emerald Shape Gemstone
Located in Peshawar, PK
Faceted Indicolite Tourmaline Weight: 47.05 Carat Dimension: 36 x 14 x 10 Mm Colour: Blue Treatment: Non Certificate: On Customer Demand Shape: Emerald Tourmaline is a captivati...
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Tourmaline, Indicolite

GIA Certified 4 Carat, D Color, VS2 Clarity, Round Brilliant Cut Loose Diamond
Located in Miami, FL
GIA Certified 4.00 Carat, D Color, VS2 Clarity, Round Brilliant Cut Loose Natural Diamond. Untreated. Certificate: GIA Report #5141637401. Item Details: - Item Type: Loose Diamond ...
Category

21st Century and Contemporary Loose Gemstones

Materials

Diamond, White Diamond

3.84 Ct Emerald Octagon Cut 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

Natural Aquamarine Beryl Gemstone: 3.47 CT Fancy Round Cut
Located in Peshawar, PK
Hardness : 7.5-8 Origin : Madagascar Shape : Fancy Round Cut Color : Crystal Blue Clarity : Loupe Clean Weight : 3.47 Carats Dimensions : 10 * 10 * 6.2 MM Treatment : Heat Family : ...
Category

2010s Loose Gemstones

Materials

Aquamarine

4.80 Carat Natural Loose Tanga Garnet Pair Gemstone From Tanzania
Located in Peshawar, PK
Faceted Tanga Garnet Pair Weight: 4.80 Carat Dimension: 7.5 x 6.3 x 5.1 Mm 7.6 x 6.3 x 5 Mm Origin: Tanga, Tanzania Shape: Cushion Certificate: On Demand Tre...
Category

21st Century and Contemporary Tanzanian Arts and Crafts Loose Gemstones

Materials

Garnet

GIA Certified 6.50 Carat Unheated Ceylon Blue Sapphire Loose Gemstone - Merkaba
Located in Beverly Hills, CA
Offered loose by Merkaba Jewelry Beverly Hills, this natural 6.50 carat Ceylon sapphire from Sri Lanka is an exceptional collector gemstone, presented in a rare elongated cushion cut...
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Sapphire, Blue Sapphire, 18k Gold, Rose Gold, White Gold, Yellow Gold, P...

8.05 Carat Natural Loose Pink Kunzite Stone Emerald Cut Afghan Gemstone
Located in Bangkok, TH
Weight 8.05 carat Dimensions 15.4x8.4x7.3mm Treatment None Origin Afghan Clarity VVS Shape Cut Emerald This stunning 8.05 Carat Natural Loose Pink Kunzite is a gemstone of ...
Category

21st Century and Contemporary Afghan Modern Loose Gemstones

Materials

Kunzite

Natural Unheated Blue Sapphire Gemstone 3.92 carats with GIA Report
Located in Los Angeles, CA
This magnificent 3.92-carat natural blue sapphire radiates with a regal, velvety blue hue and exceptional clarity. Expertly cut in a cushion shape with a modified brilliant/modified ...
Category

21st Century and Contemporary Unknown Loose Gemstones

Materials

Blue Sapphire

3.82 Ct Blue Sapphire Marquise 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

1.85 Carats Loose Silky Purple Spinel Natural Gemstone
Located in Brisbane, AU
Loose Spinel Weight: 1.85 Carats Dimension: 7.7 x 5.9 x 4.5 Mm Shape: Cushion Colour: Silky Purple Origin: Tanzania Treatment: None Certificate: On Demand . In metaphysical and crys...
Category

21st Century and Contemporary Tanzanian Arts and Crafts Loose Gemstones

Materials

Spinel, Other

12.70 Carats Natural Loose Ametrine Baguette Shape
Located in Brisbane, AU
Loose Ametrine Weight: 12.70 Carats Dimension: 15.8 x 11 x 9.2 Mm Shape: Baguette Colour: Purple and Yellow Origin: Bolivia Certificate: On Demand . Ametrine, a blend of amethyst a...
Category

21st Century and Contemporary Bolivian Arts and Crafts Loose Gemstones

Materials

Amethyst, Citrine, Other

1.54 Ct Pink Sapphire Octagon Loose Gemstone
Located in Fort Lee, NJ
A highly precious September birthstone with a delighting pink 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

Pink Sapphire

Loose Silky Purple Spinel 1.90 Carats Pear Shape Natural Gemstone
Located in Brisbane, AU
Loose Spinel Weight: 1.90 Carats Dimension: 8.7 x 6.6 x 4.8 Mm Shape: Pear Colour: Silky Purple Origin: Tanzania Treatment: None Certificate: On Demand . In metaphysical and crystal...
Category

21st Century and Contemporary Tanzanian Arts and Crafts Loose Gemstones

Materials

Spinel, Other

AIG Certified 2.07 Carat Natural Loose Purple Spinel Oval Cut Gemstone
Located in Peshawar, PK
Faceted Spinel Weight: 2.07 Carat Dimension: 8.40 x 6.91 x 4.88 Mm Colour: Purple Origin: Tanzania Treatment: None Certificate: AIG Certificate Available Spinel is a captivating g...
Category

21st Century and Contemporary Tanzanian Arts and Crafts Loose Gemstones

Materials

Spinel, Other

Lotus Certified 3.72 Carat Blue Spinel
Located in Hua Hin, TH
3.72 Carat Blue Spinel Shape: Antique Cushion Faceted Dimensions: 9.63 x 7.09 x 6.51 mm Weight: 3.72 Carat No Heat or treatment Lotus report: 4093-7832
Category

2010s Loose Gemstones

Materials

Spinel

2.01 Carat Pear Brilliant Gia Certified Fancy Grayish Greenish Yellow I1 Clarity
Located in New York, NY
ITEM DESCRIPTION ID #: NYC56773 Stone Shape: PEAR MODIFIED BRILLIANT Diamond Weight: 2.01ct Clarity: I1 Color: Fancy Grayish Greenish Yellow Cut: Excellent Measurements: 9.89 x 7.97 ...
Category

15th Century and Earlier Antique Loose Gemstones

Materials

Diamond

1.75 Carat Natural Loose Green Tourmaline Emerald Shape Gemstone
Located in Peshawar, PK
Faceted Green Tourmaline Weight: 1.75 Carat Dimension: 8.6 x 5.6 x 4.2 Mm Colour: Green Treatment: Non Certificate: On Customer Demand Shape: Emerald Tourmaline is a captivating ...
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Tourmaline

GIA Certified 1.16 Carat Fancy Pink Purple VS1 Clarity Diamond
Located in บางรัก, TH
Certificate: GIA Report Number: 5146792163 Shape And Cut: Cushion Carat Weight: 1.16 carat Measurements: 5.76 x 5.49 x 3.98 mm Color Grade: Fancy Pink Purple FEATURES OF THE DIAMON...
Category

2010s Asian Loose Gemstones

Materials

Diamond

Reddish Pink Natural Rubellite Tourmaline Ring Loose Gemstone 6.70Ct Cushion Cut
Located in Peshawar, PK
Reddish Pink Natural Rubellite Tourmaline Loose Gemstone for Ring, Necklace Pendant or any other Jewelry Setting-Cushion Cut 💎 GEMSTONE TYPE: Rubellite Tourmaline ⚖️ WEIGHT: 6.70 ...
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Rubelite, Tourmaline

18.90 Carats Natural Loose Ametrine Cushion Shape Bolivianite Gem For Jewellery
Located in Peshawar, PK
Loose Ametrine Weight: 18.90 Carats Dimension: 15.8 x 14.8 x 11.8 Mm Colour: Purple and Yellow Shape: Cushion Origin: Bolivia Treatment: Non Certificate: On Demand Ametrine ...
Category

21st Century and Contemporary Bolivian Arts and Crafts Loose Gemstones

Materials

Quartz

5.65 Ct Blue Sapphire Oval 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

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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