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Emerald Cut Loose Tourmaline

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Pink Tourmaline 18mm Loose emerald cut certified
Located in Jupiter, FL
authenticity. NATURAL GEMSTONE(S): Tourmaline Clarity/Color: Slightly Included/Pink Cut: Rectangular Treatment
Category

21st Century and Contemporary Loose Gemstones

Materials

Tourmaline

4.20 Carat Long Emerald Cut Natural Green Loose Tourmaline Emerald Cut
Located in Peshawar, PK
Clarity : Eye Clean Shape: Emerald Color: Green Certificate: On Demand Basically, mint tourmalines are
Category

21st Century and Contemporary Malagasy Arts and Crafts Loose Gemstones

Materials

Tourmaline

4.20 Carat Long Emerald Cut Natural Green Loose Tourmaline Emerald Cut
4.20 Carat Long Emerald Cut Natural Green Loose Tourmaline Emerald Cut
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H 0.56 in W 0.25 in D 0.21 in L 0.56 in
Deep Green Tourmaline 2.12ct Octagon Emerald Cut Loose Gem
Located in Birmingham, GB
Deep Green Tourmaline 2.12ct Octagon Emerald Cut Loose Gem 7.6 x 7mm Natural Deep Green Tourmaline
Category

21st Century and Contemporary Loose Gemstones

Materials

Tourmaline

3.05 Carat Emerald Cut Natural Loose Open Green Loose Tourmaline Ring Gemstone
Located in Peshawar, PK
Loose Tourmaline Weight: 3.05 Carats Dimension: 10.3x6.3x5.4 Mm Origin: Kunar Afghanistan Shape
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Tourmaline

Glowing Indicolite Tourmaline 1.80 Carats Emerald Cut Loose Pakistani Gemstone
Located in Bangkok, TH
our 1.80 carat Indicolite Tourmaline. Meticulously cut in an elegant emerald cut, this loose gemstone
Category

21st Century and Contemporary Afghan Modern Loose Gemstones

Materials

Tourmaline, Indicolite

Bicolor Tourmaline Ring Gem 17.68 Carat Emerald Cut Loose Gemstone
By Merkaba
Located in Beverly Hills, CA
Exceptional 17.68 carat, "loupe clean", Bicolor Tourmaline emerald-cut gem, offered loose to a fine
Category

21st Century and Contemporary Mozambican Modern Loose Gemstones

Materials

Tourmaline, Other

2.02ct Vivid Olive Green Tourmaline Fancy Octagon Emerald Loose Cut Gem
By Gems and Jewels UK
Located in Birmingham, GB
2.02ct Vivid Olive Green Tourmaline Fancy Octagon Emerald Loose Cut Gem 8.2x6mm Natural Olive
Category

20th Century Loose Gemstones

Materials

Emerald, Tourmaline

Blue Green Tourmaline Ring Gem 11.35 Carat Emerald Cut Loose Gemstone
By Merkaba
Located in Beverly Hills, CA
Magnificent 11.35 carat Bluish Green Tourmaline emerald cut gem, offered loose to an avid gemstone
Category

21st Century and Contemporary Afghan Modern Loose Gemstones

Materials

Tourmaline

Rare Green Natural Tourmaline Loose Gemstones, 7.20 Ct-Emerald Cut Afghanistan
Located in Peshawar, PK
Remarkable Green Emerald Cut Natural Tourmaline Loose Gemstones from Afghanistan! These Emerald Cut
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

1.90 Carat Emerald Cut Octagonal Loose Unset Unmounted Green Tourmaline Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This bright, emerald-cut green tourmaline is so lively and pretty! It weighs 1.90 carats and
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Tourmaline

1.82 carats Green Chrome Loose Tourmaline Emerald Cut Natural Tanzanian Gemstone
Located in Bangkok, TH
Shape octagon Cut emerald Behold the exquisite allure of a 1.82-carat Green Chrome Tourmaline
Category

21st Century and Contemporary Tanzanian Modern Loose Gemstones

Materials

Tourmaline

5.35 carats Bicolor Loose Tourmaline Pair Emerald cut Natural Afghan Gemstone
Located in Bangkok, TH
Octagon Cut Emerald cut Experience the captivating beauty of our Bicolor Tourmaline Pair 5.35 carats
Category

21st Century and Contemporary Afghan Modern Loose Gemstones

Materials

Tourmaline

Lagoon Blue Loose Tourmaline 1.60 Carats Emerald Cut Natural Afghan Gemstone
Located in Bangkok, TH
Included) Origin Afghanistan Shape Octagon Cut Emerald The Lagoon Blue Tourmaline is a true masterpiece
Category

21st Century and Contemporary Afghan Modern Loose Gemstones

Materials

Tourmaline

Natural Mint Green Loose Tourmaline 2.60 carats Emerald Cut Afghan Gemstone
Located in Bangkok, TH
(Very, Very Slightly Included) Shape octagon Cut emerald The Natural Mint Green Tourmaline
Category

21st Century and Contemporary Afghan Modern Loose Gemstones

Materials

Tourmaline

Mint Green Tourmaline 6.10 Carats Emerald Cut Natural Afghani Loose Gemstone
Located in Bangkok, TH
(Very, Very Slightly Included) Shape Octagon Cut Emerald Discover the allure of our Mint Green
Category

21st Century and Contemporary Afghan Modern Loose Gemstones

Materials

Tourmaline

Mint Green Loose Tourmaline 1.80 carat Emerald Cut Natural Afghanistani Gemstone
Located in Bangkok, TH
clean Shape octagon Cut emerald The Mint Green Tourmaline is a true marvel of nature, a gemstone
Category

21st Century and Contemporary Afghan Modern Loose Gemstones

Materials

Tourmaline

Bluish Green Tourmaline 3.75 carats Emerald Cut Natural Loose African Gemstone
Located in Bangkok, TH
Shape Octagon Cut Emerald The bluish green Tourmaline is a stunning 3.75 carat gemstone with an
Category

21st Century and Contemporary African Modern Loose Gemstones

Materials

Tourmaline

Greenish Blue Tourmaline 2.70 carats Emerald Cut Natural Afghani Loose Gemstone
Located in Bangkok, TH
(Very, Very Slightly Included) Shape Octagon Cut Emerald Indulge in the captivating allure of our
Category

21st Century and Contemporary Afghan Modern Loose Gemstones

Materials

Tourmaline

Blue Green Tourmaline Gem 9.64 Carat Unset Emerald Cut Loose Gemstone
By Merkaba
Located in Beverly Hills, CA
Exclusive 9.64 carat elongated emerald-cut Bluish Green Tourmaline gem offered loose to a very
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Other, Tourmaline

Rare Green Emerald Cut Natural Tourmaline Loose Gemstone, 5.35 Carat-Afghani
Located in Peshawar, PK
Magnificent yellowish green Natural Tourmaline Loose Gemstone, that has been finely cut and
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

1.15 Carats Loose Green Tourmaline Stone Emerald Cut Natural Afghan Gemstone
Located in Bangkok, TH
Shape octagon Cut emerald The exquisite Green Tourmaline stone, boasting a weight of 1.15 carats
Category

21st Century and Contemporary Afghan Modern Loose Gemstones

Materials

Tourmaline

Rare Bicolor Natural Tourmaline Loose Gemstone, 5.80 Carat-Emerald/Octagon Cut
Located in Peshawar, PK
Introducing our stunning 5.80 Carat Bicolor Natural Tourmaline Loose Gemstone, sourced from Africa
Category

21st Century and Contemporary Congolese Contemporary Loose Gemstones

Materials

Tourmaline

Genuine 1.90 Carat Natural Loose Indicolite Tourmaline Emerald Cut Gemstone
Located in Peshawar, PK
Blue Indicolite Tourmaline Weight : 1.90 Carats Dimensions : 9.1x5.8x4.2 Mm Origin : Kunar
Category

Antique 15th Century and Earlier Afghan Arts and Crafts Loose Gemstones

Materials

Tourmaline, Indicolite

Seafoam Blue Loose Tourmaline 1.90 Carats Emerald Cut Natural Afghan Gemstone
Located in Bangkok, TH
Cut Step Emerald The 1.90 carat weight adds substance to its visual appeal, making it a statement
Category

21st Century and Contemporary Afghan Modern Loose Gemstones

Materials

Tourmaline

Bluish Green Natural Tourmaline Loose Gemstone, 7.00 Carat Emerald Cut Afghani
Located in Peshawar, PK
indulge in the beauty of this premium loose gemstone. Gemstone Type: Tourmaline Weight: 7.00 Carat
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

3.80 Carat Natural Loose Emerald Cut Mint Tourmaline Gem For Ring
Located in Peshawar, PK
Loose Mint Tourmaline Weight: 3.80 Carats Dimension: 14.1 x 6.1 x 5 Mm Colour : Mint Green
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Tourmaline

2.95 Carats Natural Loose Blueish Green Tourmaline Emerald Cut Ring Gemstone
Located in Peshawar, PK
Loose Tourmaline Weight: 2.95 Carats Dimension: 7.5x7.3x6.4 Mm Origin: Afghanistan Color: Blue
Category

21st Century and Contemporary Afghan Aesthetic Movement Loose Gemstones

Materials

Tourmaline

3.05 Cts Natural Loose Blueish Green Tourmaline Emerald Cut Ring Gemstone
Located in Peshawar, PK
Shape: Emerald Certificate: On Customer Demand . Blueish green tourmaline, also known as blue-green
Category

21st Century and Contemporary Malagasy Baroque Revival Loose Gemstones

Materials

Tourmaline

Blue Indicolite Tourmaline Ring Gem 8.20 Carat Emerald Cut Loose Gemstone
By Merkaba
Located in Beverly Hills, CA
Exceptional 8.20 carat exotic Indicolite Tourmaline gem, offered loose to a fine gemstone collector
Category

21st Century and Contemporary Namibian Modern Loose Gemstones

Materials

Tourmaline, Indicolite

Rare Green Natural Tourmaline Loose Gemstone, 7.75 Ct-Emerald Cut Top Quality
Located in Peshawar, PK
Elevate your jewelry creations with our stunning 7.75-Carats natural Tourmaline loose gemstone
Category

21st Century and Contemporary Afghan Loose Gemstones

Materials

Tourmaline

2.75 Carat Included Natural Loose Indicolite Tourmaline Emerald Cut Ring Gem
Located in Peshawar, PK
Gorgeous Loose Indicolite Tourmaline Weight: 2.75 Carats Dimension: 8.1x6.9x5.9 Mm Origin; Kunar
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Tourmaline, Indicolite

Set of 2 Loose Tourmalines - Emerald Cut 1.57ctw Blue Green Matched Pair
Located in Greensboro, NC
Treatment: No Treatment Total Carats: 1.57ctw Cut: Emerald Color: Blue Green Origin: Nigeria Size
Category

21st Century and Contemporary Loose Gemstones

Materials

Tourmaline

Pink Tourmaline Ring Gem 5.83 Carat Unmounted Square Emerald Cut Loose Gemstone
By Merkaba
Located in Beverly Hills, CA
5.83 carat Pink Tourmaline square emerald-cut loose gemstone, offered unmounted to a very special
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

2.60 carats Bi-Color Loose Tourmaline Stone Emerald Cut Natural African Gemstone
Located in Bangkok, TH
octagon Cut emerald The exquisite Bi-Color Tourmaline stone, boasting a weight of 2.60 carats
Category

21st Century and Contemporary African Modern Loose Gemstones

Materials

Tourmaline

4.70 Carats Sea Blue Loose Tourmaline Pair Emerald Cut Natural Afghan Gemstone
Located in Bangkok, TH
, Very Slightly Included) Shape octagon Cut emerald Behold the exquisite allure of this stunning
Category

21st Century and Contemporary Afghan Modern Loose Gemstones

Materials

Tourmaline

Bi-Color Loose Tourmaline 1.75 carats Step Emerald Cut Natural Afghan Gemstone
Located in Bangkok, TH
rectangular Cut Emerald Step Cut The Bi-Color Tourmaline, a captivating gemstone weighing 1.75 carats, is
Category

21st Century and Contemporary Afghan Modern Loose Gemstones

Materials

Tourmaline

Rare Green Emerald/Octagon Cut Natural Tourmaline Loose Gemstone, 6.25 Ct-Afghan
Located in Peshawar, PK
Fantastic Yellowish Green Emerald/Octagon Cut Natural Tourmaline Loose Gemstones from Afghanistan
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Rare Silver Grey Natural Tourmaline Loose Gemstone, 4.45 Ct-Emerald Cut Afghani
Located in Peshawar, PK
A very impressive Silver Grey Emerald Cut Natural Tourmaline Loose Gemstones from Afghanistan! This
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Greenish Yellow Tourmaline Ring Gem 17.54 Carat Unset Emerald Cut Loose Gemstone
By Merkaba
Located in Beverly Hills, CA
Exclusive 17.54 carat, "loupe clean", greenish yellow Tourmaline, emerald-cut gem, offered loose to
Category

21st Century and Contemporary Namibian Contemporary Loose Gemstones

Materials

Tourmaline, Other

Rare Tricolor/Parti Natural Tourmaline Loose Gemstone, 4.85 Ct-Long Emerald Cut
Located in Peshawar, PK
Experience the allure of our stunning 4.85-Carat elongated Emerald Cut Tricolor/Parti-color natural
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Rare Pink Natural Tourmaline Loose Gemstones, 3.80 Ct Octagon Emerald Cut Afghan
Located in Peshawar, PK
GEMSTONE TYPE: Tourmaline PIECE(S): 2 WEIGHT: 3.80 Carat SHAPE: Octagon Emerald Cut SIZE (MM
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Rare Green Elongated Emerald Cut Natural Tourmaline Loose Gemstone, 5.15 Ct-Afg
Located in Peshawar, PK
Discover the allure of our rare green elongated emerald cut natural Tourmaline. With exceptional luster and
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Rare Bluish Green Natural Tourmaline Loose Gemstone, 6.50 Ct-Emerald Cut Afghani
Located in Peshawar, PK
rich Afghani landscapes, this 6.50 Ct Emerald Cut gem boasts a magnificent luster that captivates with
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Emerald Cut Rare Neon Bluish Green Natural Tourmaline Loose Gemstone, 14.75 Ct
Located in Peshawar, PK
Behold the allure of our remarkable Neon Bluish Green Natural Loose Gemstone, a substantial 14.75
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Rare Pink Bicolor Natural Tourmaline Loose Gemstone, 1.75 Ct-Emerald/Octagon Cut
Located in Peshawar, PK
enchantment of our rare Pink Bicolor emerald/Octagon cut natural Tourmaline Loose Gemstone. Revel in its
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Genuine 8.15 Carats Natural Loose Bicolor Loose Tourmaline Scissor Emerald Shape
Located in Peshawar, PK
: Scissor Emerald Color: Pink & White Treatment: Non Loose tourmaline gemstones come in a dazzling array of
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Tourmaline

Gorgeous 3.70 Carats SI Clarity Natural Loose Lagoon Tourmaline Emerald Cut Gem
Located in Peshawar, PK
: Emerald Color: Greenish Blue Treatment: Natural Certificate: On Customer Demand Lagoon tourmaline, a
Category

21st Century and Contemporary Afghan Early Victorian Loose Gemstones

Materials

Tourmaline

Gorgeous 12.80 Carat Natural Loose Neon Blue Tourmaline Emerald Cut Afghan Mine
Located in Peshawar, PK
make up a huge family of gemstones. Like most cut specimens, mint tourmalines belong to the elbaite
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Tourmaline

Gorgeous Natural Loose Mint Green Tourmaline Emerald Cut Ring Gemstone 2.0 Carat
Located in Peshawar, PK
make up a huge family of gemstones. Like most cut specimens, mint tourmalines belong to the elbaite
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Tourmaline

Elegant 38.65 Carat Natural Loose Bi Color Tourmaline Emerald Cut Necklace Gem
Located in Peshawar, PK
& Orange Shape: Emerald Quality: AAA . Bicolor tourmaline is connected to the heart chakra, which makes it
Category

21st Century and Contemporary Malagasy Arts and Crafts Loose Gemstones

Materials

Tourmaline

1.43 Carat Emerald cut Tourmaline
Located in London, GB
1.43 Carat Emerald cut Tourmaline. This gorgeous Emerald cut Tourmaline weighs 1.43 Carats and
Category

21st Century and Contemporary Contemporary Loose Gemstones

Materials

Tourmaline

1.43 Carat Emerald cut Tourmaline
1.43 Carat Emerald cut Tourmaline
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W 0.22 in D 0.16 in L 0.26 in
2.38 Carat Emerald cut Tourmaline
Located in London, GB
2.38 Carat Emerald cut Tourmaline. This gorgeous Emerald cut Tourmaline weighs 2.38 Carats and
Category

21st Century and Contemporary Contemporary Loose Gemstones

Materials

Tourmaline

2.38 Carat Emerald cut Tourmaline
2.38 Carat Emerald cut Tourmaline
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W 0.22 in D 0.13 in L 0.49 in
4.38 Carat Emerald cut Tourmaline
Located in London, GB
4.38 Carat Emerald cut Tourmaline. This unique Emerald cut Tourmaline weighs 4.38 Carats and
Category

21st Century and Contemporary Contemporary Loose Gemstones

Materials

Tourmaline

4.38 Carat Emerald cut Tourmaline
4.38 Carat Emerald cut Tourmaline
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W 0.29 in D 0.17 in L 0.57 in
3.07 Carat Emerald cut Tourmaline
Located in London, GB
3.07 Carat Emerald cut Tourmaline. This rich, deep green Emerald cut Tourmaline weighs 3.07 carats
Category

21st Century and Contemporary Contemporary Loose Gemstones

Materials

Tourmaline

3.07 Carat Emerald cut Tourmaline
3.07 Carat Emerald cut Tourmaline
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W 0.3 in D 0.21 in L 0.35 in
3.47 Carat Emerald Cut Tourmaline
Located in London, GB
3.47 Carat Emerald Cut Tourmaline. This stunning Emerald cut Tourmaline has remarkable depth and
Category

21st Century and Contemporary Contemporary Loose Gemstones

Materials

Tourmaline

3.47 Carat Emerald Cut Tourmaline
3.47 Carat Emerald Cut Tourmaline
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W 0.3 in D 0.22 in L 0.44 in
Rare Pink Natural Tourmaline Loose Gemstone 2.45 Ct Emerald Cut for Ring/Pendant
Located in Peshawar, PK
demand Captivate hearts with this mesmerizing 2.45-carat emerald-cut pink tourmaline, a radiant treasure
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

4.80 Carats Natural Mint Green Bicolor Tourmaline Loose Ring Gem Emerald Cut
Located in Peshawar, PK
Faceted Tourmaline Weight: 4.80 Carats Dimension: 18.2x5.6x5 Mm Origin: Kunar Afghanistan Shape
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Multi-gemstone, Tourmaline

6.75 Carats Natural Loose Bicolour Tourmaline Emerald Shape
Located in Peshawar, PK
Loose Tourmaline Weight: 6.75 Carats Dimension; 14.9x8x6.2 Mm Origin: Kunar Afghanistan Shape
Category

21st Century and Contemporary Afghan Art Nouveau Loose Gemstones

Materials

Tourmaline

6.75 Carats Natural Loose Bicolour Tourmaline Emerald Shape
6.75 Carats Natural Loose Bicolour Tourmaline Emerald Shape
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W 0.32 in D 0.25 in L 0.59 in
Deep Green Natural Tourmaline Loose Gemstone, 5.05 Ct-Emerald Cut Top Quality Af
Located in Peshawar, PK
Elevate your jewelry collection with this exquisite deep green emerald-cut natural Tourmaline
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Pink Bicolor Rare Natural Tourmaline Loose Gemstones Lot, 3.70 Ct Emerald Cut Af
Located in Peshawar, PK
Natural Tourmaline Loose Gemstones Lot, sourced directly from Afghanistan. Each gemstone boasts a unique
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Pink Bicolor Rare Natural Tourmaline Loose Gemstones Lot, 3.70 Ct Emerald Cut Af
Pink Bicolor Rare Natural Tourmaline Loose Gemstones Lot, 3.70 Ct Emerald Cut Af
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H 0.28 in W 0.18 in D 0.12 in Dm 0.26 in L 0.29 in
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Emerald Cut Loose Tourmaline For Sale on 1stDibs

Surely you’ll find the exact emerald cut loose tourmaline you’re seeking on 1stDibs — we’ve got a vast assortment for sale. Find an antique version now, or shop for 1 vintage or 20 modern creation for a more contemporary example of these cherished accessories. You’re likely to find the perfect emerald cut loose tourmaline among the distinctive items we have available, which includes versions made as long ago as the 20th Century as well as those produced as recently as the 21st Century. There have been many well-made iterations of the classic emerald cut loose tourmaline over the years, but those made by Merkaba, Tamir and Sarosi By Timeless Gems are often thought to be among the most beautiful. Today, if you’re looking for an emerald cut version of this piece and are unable to find the perfect match, our selection also includes alternatives. Most of our emerald cut loose tourmaline for sale are for women, but there are 17 pieces available to browse for men.

How Much is a Emerald Cut Loose Tourmaline?

Prices for an emerald cut loose tourmaline can differ depending upon size, time period and other attributes — at 1stDibs, these accessories begin at $1,500 and can go as high as $40,000, while this accessory, on average, fetches $7,368.

Finding the Right loose-gemstones for You

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.