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Tanzanite Loose Gemstone

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111.55 Carat Tanzanite Loose Gemstone
Located in New York, NY
Introducing the breathtaking 111.55 carat loose Tanzanite, a rare and extraordinary gemstone of the
Category

2010s Tanzanian Loose Gemstones

Materials

Tanzanite

SDLX Grade Natural Tanzanite 8x6m Cushion Shape Tanzanite Loose Gemstone Jewelry
Located in New York, NY
of all the types of Natural Gemstones Tanzanite. and Morganite , Aquamarine, Blue Topaz, Opal Loose
Category

21st Century and Contemporary Tanzanian Loose Gemstones

Materials

Tanzanite

Loose Tanzanite Gemstone 3.3 ct
Located in Laguna Beach, CA
Loose 3.30-carat tanzanite gemstone. No grading lab certificate. The stone is a rectangle cushion
Category

21st Century and Contemporary Loose Gemstones

Materials

Tanzanite

7.20 Carat Oval Tanzanite, Unset Loose Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
Top quality tanzanites like this 7.20 carat oval make it easy to see why this gorgeous gemstone is
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Tanzanite

9.91 Carat Tanzanite Emerald Cut, Loose Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
If there was ever a gemstone that could make you fall in love with emerald-cuts, this would be it
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Tanzanite

1.50 Carat Oval Loose Unset Tanzanite Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This 1.50 carat oval tanzanite has beautiful, medium violet-blue color and is such a pretty gem! It
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Tanzanite

Tanzanite Gem 3.77 Carat Round Cut Loose Gemstone Tanzanite Jewelry
Located in New York, NY
- 3.77 Cts Length * Width - (9.7)*6 Price - 1350 AAA Tanzanite is one of the rarest gemstones in the
Category

21st Century and Contemporary Tanzanian Loose Gemstones

Materials

Tanzanite

12.7 Carat Natural Tanzanite Emerald Cut Loose Gemstone Tanzanite Jewelry
Located in New York, NY
- 12.7 cts Length * Weight * Height - 13.9*11.8*8.6 AAA Tanzanite is one of the rarest gemstones in the
Category

21st Century and Contemporary Tanzanian Art Deco Loose Gemstones

Materials

Tanzanite

14.56 Carat Natural Tanzanite Emerald Cut Loose Gemstone Tanzanite Jewelry
Located in New York, NY
you may love! We Deal in a huge variety of all the types of Natural Gemstones Tanzanite. and
Category

21st Century and Contemporary Tanzanian Art Deco Loose Gemstones

Materials

Tanzanite

Tanzanite Ring Stone 56 Carat Cushion Loose Gemstone
By Merkaba
Located in Beverly Hills, CA
Exceptional and coveted 56.77 carat Tanzanite square cushion loose gemstone, offered unmounted to a
Category

21st Century and Contemporary Tanzanian Contemporary Loose Gemstones

Materials

Tanzanite

Tanzanite Ring Stone 56 Carat Cushion Loose Gemstone
Tanzanite Ring Stone 56 Carat Cushion Loose Gemstone
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W 0.9 in D 0.58 in L 0.9 in
Tanzanite Ring Gem 8.07 Carat Cushion Loose Gemstone
By Merkaba
Located in Beverly Hills, CA
Marvelous 8.07 carat Tanzanite cushion cut gem offered loose to a lady or gentleman. Dimensions
Category

21st Century and Contemporary Unknown Contemporary Loose Gemstones

Materials

Tanzanite

Tanzanite Ring Gem 8.07 Carat Cushion Loose Gemstone
Tanzanite Ring Gem 8.07 Carat Cushion Loose Gemstone
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W 0.47 in D 0.33 in L 0.47 in
Tanzanite Ring Gem 5.46 Carat Trillion Loose Gemstone
Located in New York, NY
gemstones in the world. Get this beautiful gem to grace your collection with charm and shine. Tanzanite
Category

21st Century and Contemporary Tanzanian Loose Gemstones

Materials

Tanzanite

Tanzanite Ring Gem 5.46 Carat Trillion Loose Gemstone
Tanzanite Ring Gem 5.46 Carat Trillion Loose Gemstone
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H 0.26 in W 0.47 in L 0.47 in
5.61 Carat Pear Shaped Tanzanite, Unset Loose Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
Have you been dreaming of a tanzanite? It may be time to treat yourself to this vivid pear shaped
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Tanzanite

5.61 Carat Pear Shaped Tanzanite, Unset Loose Gemstone
5.61 Carat Pear Shaped Tanzanite, Unset Loose Gemstone
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W 0.35 in D 0.26 in L 0.56 in
Tanzanite Earrings Loose Gemstones 3.34 Carat Square Octagons
By Merkaba
Located in Beverly Hills, CA
Special 3.34 carat Tanzanite pair of square octagon loose gemstones, offered unmounted to a very
Category

21st Century and Contemporary Tanzanian Contemporary Loose Gemstones

Materials

Tanzanite

Tanzanite Earrings Loose Gemstones 4.04 Carats Unmounted Cushion
By Tamir
Located in Beverly Hills, CA
Lively Tanzanite cushion pair totaling 4.04 carats, offered unmounted for a spectacular custom pair
Category

21st Century and Contemporary Tanzanian Contemporary Loose Gemstones

Materials

Tanzanite

1.32 Carat Pear-Shaped Loose Unset Tanzanite Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This 1.32 carat pear-shaped tanzanite is a real beauty! It has classic bluish violet color and a
Category

21st Century and Contemporary Zambian Artisan Loose Gemstones

Materials

Tanzanite

3.66 Carat Tanzanite Gemstone, Oval Cut Loose Solitaire
Located in Greensboro, NC
; diamonds and gemstones are graded and identified by GIA graduates. If there is a specific piece you are
Category

20th Century Unknown Loose Gemstones

Materials

Tanzanite

5.33 Carat Natural Tanzanite Oval Faceted Cut AAA Color Loose Tanzanite Gemstone
Located in New York, NY
* Breadth * Height - 12.1*10.0*6.4 Price - $ 1890 AAA Tanzanite is one of the rarest gemstones in the
Category

21st Century and Contemporary Tanzanian Loose Gemstones

Materials

Tanzanite

Tanzanite Earrings Gemstone Pair 6.70 Carats Oval Loose Gems
By Merkaba
Located in Beverly Hills, CA
"Loupe clean" purplish blue Tanzanite oval pair, weighing a total of 6.70 carats, offered loose for
Category

21st Century and Contemporary Unknown Contemporary Loose Gemstones

Materials

Tanzanite

Tanzanite Earrings Gemstone Pair 6.70 Carats Oval Loose Gems
Tanzanite Earrings Gemstone Pair 6.70 Carats Oval Loose Gems
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W 0.32 in D 0.24 in L 0.4 in
3.84 Carat AAA Natural Tanzanite Oval Cut Shape Loose Tanzanite Gemstone Jewelry
Located in New York, NY
Cts Length * Width * Height - 11*9*5.5 Price - $ 1370 AAA Tanzanite is one of the rarest gemstones
Category

21st Century and Contemporary Tanzanian Loose Gemstones

Materials

Tanzanite

Natural Tanzanite DLX Color Cushion Shape Loose Gemstone Jewelry
Located in New York, NY
DLX Tanzanite is one of the rarest gemstones in the world. Get this beautiful gem to grace your
Category

21st Century and Contemporary Tanzanian Loose Gemstones

Materials

Tanzanite

1.17 Carat Unset Loose Unmounted Cushion Shaped Tanzanite Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This petite tanzanite gemstone is both gorgeous and budget-friendly! With its characteristic
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Tanzanite

Tanzanite Necklace Ring Gem 8.78 Carat Shield Loose Gemstone
By Merkaba
Located in Beverly Hills, CA
Graceful 8.78 carat "loupe clean" Tanzanite Shield gem, offered loose to a sophisticated gemstone
Category

21st Century and Contemporary Tanzanian Contemporary Loose Gemstones

Materials

Tanzanite

Tanzanite Necklace Ring Gem 8.78 Carat Shield Loose Gemstone
Tanzanite Necklace Ring Gem 8.78 Carat Shield Loose Gemstone
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W 0.57 in D 0.28 in L 0.77 in
3.66 Carat Unset Loose Pear Shaped Unmounted Tanzanite Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This gorgeous 3.66 carat pear-shaped tanzanite has rich, deep color, which is seldom seen. It will
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Tanzanite

Tanzanite Earrings Gemstone Pair 3.90 Carats Oval Loose Gems
By Tamir
Located in Beverly Hills, CA
"Loupe clean" purplish blue Tanzanite oval pair, weighing a total of 3.90 carats, offered loose for
Category

21st Century and Contemporary Unknown Contemporary Loose Gemstones

Materials

Tanzanite

Tanzanite Earrings Gemstone Pair 3.90 Carats Oval Loose Gems
Tanzanite Earrings Gemstone Pair 3.90 Carats Oval Loose Gems
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W 0.29 in D 0.2 in L 0.33 in
AAAA+ 11.10 Carat Natural Tanzanite Pear Shape Loose Gemstone Jewelry
Located in New York, NY
Stone Dimensions-----------------------------------❤️ * Gemstone :- Natural Tanzanite * Size
Category

21st Century and Contemporary Tanzanian Art Deco Loose Gemstones

Materials

Tanzanite

Gorgeous 1.50 Carat Oval Shape Natural Loose Blue Tanzanite Gemstone
Located in Peshawar, PK
Tanzanite. This gemstone can be worn by anyone. Some people do associate it the stone with Saturn, and some
Category

2010s Tanzanian Arts and Crafts Loose Gemstones

Materials

Tanzanite

3.77 Cts Natural Blue Tanzanite, Octagon Shape, Asher Cut, Loose Gemstone
Located in New York, NY
gemstones in the world. Get this beautiful gem to grace your collection with charm and shine. Tanzanite
Category

21st Century and Contemporary Tanzanian Loose Gemstones

Materials

Tanzanite

9.81 Carat Natural Tanzanite Oval Cut AAA Excellent Quality Loose Gemstone
Located in New York, NY
* Breadth * Height - 14.7*11.6*7.8 AAA Tanzanite is one of the rarest gemstones in the world. Get this
Category

21st Century and Contemporary Tanzanian Art Deco Loose Gemstones

Materials

Tanzanite

Emerald Cut Natural Blue Tanzanite AAA Grade 12.63 Carat Loose Gemstone Jewelry
Located in New York, NY
gemstones in the world. Get this beautiful gem to grace your collection with charm and shine. tanzanite
Category

21st Century and Contemporary Loose Gemstones

Materials

Tanzanite

AAA Natural Tanzanite Cushion Shape 1.52 Cts Faceted Cut 8x6mm Loose Gemstone
Located in New York, NY
of all the types of Natural Gemstones Tanzanite. and Morganite , Aquamarine, Blue Topaz, Opal Loose
Category

21st Century and Contemporary Tanzanian Loose Gemstones

Materials

Tanzanite

4.63 Cts Natural Tanzanite Trillion Cut Eye Clean Clarity AAA Loose Gemstone
Located in New York, NY
gemstones in the world. Get this beautiful gem to grace your collection with charm and shine. tanzanite
Category

21st Century and Contemporary Tanzanian Loose Gemstones

Materials

Tanzanite

9.77 Ct Natural Tanzanite, Emerald Cut, AAA Color Top Quality, Loose Gemstone
Located in New York, NY
* Breadth * Height -14.2*9.8*7.3 Price - $3480 AAA Tanzanite is one of the rarest gemstones in the world
Category

21st Century and Contemporary Tanzanian Loose Gemstones

Materials

Emerald, Tanzanite

2.50 Carat Natural Loose Tanzanite Tear/Pear Shape Gemstone for Jewelry Making
Located in Peshawar, PK
Faceted Tanzanite Weight: 2.50 Carats Dimension: 12.9x6.8x4.7 Mm Origin: Tanzania Color: Purplish
Category

2010s Tanzanian Arts and Crafts Loose Gemstones

Materials

Tanzanite

3.12 Cts Natural Tanzanite SDLX Grade Cushion Shape Loose Tanzanite Stone
Located in New York, NY
of all the types of Natural Gemstones Tanzanite. and Morganite , Aquamarine, Blue Topaz, Opal Loose
Category

21st Century and Contemporary Tanzanian Loose Gemstones

Materials

Tanzanite

5.19 CTW IF AA Loose Trillion Tanzanite Stone
Located in Stuart, FL
5.19 CTW IF AA loose trillion tanzanite stone, measures 9.7 x 12.3 mm
Category

21st Century and Contemporary Loose Gemstones

Materials

Tanzanite

5.19 CTW IF AA Loose Trillion Tanzanite Stone
5.19 CTW IF AA Loose Trillion Tanzanite Stone
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W 0.39 in L 0.49 in
4.25 Carat Tanzanite Pear-Shaped - Single Loose Stone
Located in Endwell, NY
Select this gorgeous ocean tanzanite for your next addition for any gemstone collection or jewelry
Category

20th Century Loose Gemstones

Materials

Tanzanite

4.25 Carat Tanzanite Pear-Shaped - Single Loose Stone
4.25 Carat Tanzanite Pear-Shaped - Single Loose Stone
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W 0.38 in D 0.25 in L 0.5 in
Exceptional Vivid Tanzanite Loose Stone 11.01 Carats GIA Certified
Located in Media, PA
GIA REPORT NUMBER: 6234199403 This exceptional loose tanzanite stone, weighing 11.01 carats, has
Category

21st Century and Contemporary Tanzanian Loose Gemstones

Materials

Tanzanite

Fabulous Loose Sugarloaf Cabochon Tanzanite of 26.20 Ct
Located in Lucerne, CH
Beautiful large sugarloaf Tanzanite of 26.20 ct. Nice and rich purplish-blue colour evenly
Category

21st Century and Contemporary Tanzanian Modern Loose Gemstones

Materials

Tanzanite

Natural Gemstones Tanzanites 5.99 carats total weight
Located in Los Angeles, CA
A deep purplish blue beams from this pair of natural Tanzanites. The perfect pair of hearts, their
Category

21st Century and Contemporary Unknown Loose Gemstones

Materials

Tanzanite

Natural Gemstones Tanzanites  5.99 carats total weight
Natural Gemstones Tanzanites  5.99 carats total weight
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W 0.36 in D 0.24 in L 0.36 in
Purplish Blue Tanzanite Heart Shaped 1.30 Cts Tanzanite Gemstone from Tanzania
Located in Bangkok, TH
: GEMSTONE TYPE: Purplish Blue Tanzanite Heart Shaped WEIGHT: 1.30 carats DIMENSIONS: 6.8 x 6.7 x 4.7mm
Category

21st Century and Contemporary Tanzanian Modern Loose Gemstones

Materials

Tanzanite

5 Carat Tanzanite 10mm Round Faceted Cut - Single Loose Stone
Located in Endwell, NY
This loose tanzanite measures 10mm in diameter by 7.20mm in depth with a round faceted cut, giving
Category

20th Century Loose Gemstones

Materials

Tanzanite

4 Carat Tanzanite 9mm Round Faceted Cut - Single Loose Stone
Located in Endwell, NY
Add this stunning round faceted cut tanzanite to your gemstone and jewelry collection, or make it
Category

20th Century Loose Gemstones

Materials

Tanzanite

Rare gemstone pink tanzanite Unheated zoisite 3.17ct ICA certificate
Located in bangkok, TH
Name: pink tanzanite unheated / zoisite Weight: 3.17 carat Color: pink Origin: Tanzania Size
Category

2010s Loose Gemstones

Materials

Tanzanite

collection tanzanite 41.81ct royal blue cabochon 100% clean gemstone
Located in bangkok, TH
Name: tanzanite weight: 41.81ct size: 17.5*17.3mm origin: Tanzania color: Royal blue clarity
Category

2010s Loose Gemstones

Materials

Tanzanite

11.38 Carat, Natural Blue Tanzanite, Square Cushion, AAA Color, Loose Stone
Located in New York, NY
Length * Breadth * Height - 12.7*12.7*9 Price - $ 4064 AAA Tanzanite is one of the rarest gemstones in
Category

21st Century and Contemporary Tanzanian Loose Gemstones

Materials

Tanzanite

Precision master cut tanzanite 1.88ct fantastic gemstone unique piece
Located in bangkok, TH
Name: master cut tanzanite weight: 1.88ct size: 6.9mm origin: Tanzania color: blue clarity: loop
Category

2010s African Loose Gemstones

Materials

Tanzanite

Heart Shaped Loose Tanzanite Set No Reviews 4.80 Carats '1.20 Carat Each'
Located in Bangkok, TH
Clarity 4.80 carats (1.20 carat each) loose tanzanite gemstone from Tanzania. Product Information
Category

21st Century and Contemporary Unknown Modern Loose Gemstones

Materials

Tanzanite

Opal Stone 51.39 Carat Natural Ethiopian loose Gemstone
By Merkaba
Located in Beverly Hills, CA
Natural 51.39 carat free-form Ethiopian Opal loose gemstone, offered unmounted to an exclusive gem
Category

21st Century and Contemporary Ethiopian Contemporary Loose Gemstones

Materials

Opal

Opalescent Blue Tanzanite Stone Pair 4.25 carats Oval Shaped Tanzanian Gemstone
Located in Bangkok, TH
Shape Oval Cut Fancy Oval Discover a captivating pair of natural Tanzanian gemstones with this
Category

21st Century and Contemporary Tanzanian Modern Loose Gemstones

Materials

Tanzanite

Exquisite Natural Blue Tanzanite Gemstone 2.80 Carats Fine Jewelry Faceted Stone
Located in Bangkok, TH
Exquisite Natural Blue Tanzanite Gemstone, Available For Sale At Wholesale Price Natural High
Category

21st Century and Contemporary Tanzanian Modern Loose Gemstones

Materials

Tanzanite

Heart Shaped Blue Tanzanite Stone Pair 2.35 carats Natural Tanzanian Gemstone
Located in Bangkok, TH
gemstones are an embodiment of elegance and grace. tanzanite tanzanite stone tanzanite rings tanzanite
Category

21st Century and Contemporary Tanzanian Modern Loose Gemstones

Materials

Tanzanite

Pink Tourmaline Ring Gem 3.18 Carat Unmounted Loose Gemstone
By Tamir
Located in Beverly Hills, CA
Pristine 3.18 carat Pink Tourmaline emerald cut loose gemstone, offered unmounted to a fine
Category

21st Century and Contemporary Congolese Contemporary Loose Gemstones

Materials

Tourmaline

Aquamarine Ring Loose Gemstone 4.26 Carat Oval Unmounted Gem
By Tamir
Located in Beverly Hills, CA
Bright 4.26 carat Aquamarine oval loose gemstone, offered unmounted to a very special person
Category

21st Century and Contemporary Malagasy Contemporary Loose Gemstones

Materials

Aquamarine, Beryl

Aquamarine Ring Loose Gemstone 4.26 Carat Oval Unmounted Gem
Aquamarine Ring Loose Gemstone 4.26 Carat Oval Unmounted Gem
Free Shipping
W 0.39 in D 0.12 in L 0.49 in
Opal Stone 25.67 Carat Oval Natural Ethiopian Loose Gemstone
By Merkaba
Located in Beverly Hills, CA
Natural 25.67 Carat oval Ethiopian Opal loose gemstone, offered unmounted to a fine gem collector
Category

21st Century and Contemporary Ethiopian Contemporary Loose Gemstones

Materials

Opal

Imperial Topaz Earrings Loose Gemstones 3.36 Carat Unmounted Cushions
By Merkaba
Located in Beverly Hills, CA
Bright 3.36 carat Brazilian Imperial Topaz pair of cushion loose gemstones, offered unmounted to
Category

21st Century and Contemporary Brazilian Contemporary Loose Gemstones

Materials

Topaz, Imperial Topaz

Opal Stone 27.42 Carat Natural Ethiopian Oval loose Gemstone
By Merkaba
Located in Beverly Hills, CA
Natural 27.42 carat oval Ethiopian Opal loose gemstone, offered unmounted to an avid gem collector
Category

21st Century and Contemporary Ethiopian Contemporary Loose Gemstones

Materials

Opal

Opal Stone 13.88 Carat Natural Ethiopian Marquise loose Gemstone
By Merkaba
Located in Beverly Hills, CA
Natural 13.88 carat Marquise Ethiopian Opal loose gemstone, offered unmounted to a fine gem lover
Category

21st Century and Contemporary Ethiopian Contemporary Loose Gemstones

Materials

Opal

Opal Stone 22.20 Carat Natural Ethiopian Oval loose Gemstone
By Merkaba
Located in Beverly Hills, CA
Natural 22.20 carat oval Ethiopian Opal loose gemstone, offered unmounted to someone special
Category

21st Century and Contemporary Ethiopian Contemporary Loose Gemstones

Materials

Opal

Opal Stone 38.92 Carat Natural Ethiopian Marquise loose Gemstone
By Merkaba
Located in Beverly Hills, CA
Natural 38.92 carat Marquise Ethiopian Opal loose gemstone, offered unmounted to an avid gem
Category

21st Century and Contemporary Ethiopian Contemporary Loose Gemstones

Materials

Opal

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Tanzanite Loose Gemstone For Sale on 1stDibs

On 1stDibs, you can find the most appropriate tanzanite loose gemstone for your needs in our varied inventory. Finding an appealing tanzanite loose gemstone — no matter the origin — is easy, but Merkaba, Sarosi By Timeless Gems and Tamir each produced a popular version that is worth a look. See these pages for a cushion cut iteration of this accessory, while there are also oval cut cut and emerald cut cut versions available here, too. There aren’t many items for men if you’re seeking a tanzanite loose gemstone, as most of the options available are for women and unisex.

How Much is a Tanzanite Loose Gemstone?

The price for a tanzanite loose gemstone starts at $2,500 and tops out at $48,500 with these rings, on average, selling for $7,200.

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.