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4.54 Carat Aquamarine, Pear Shape, Loose Unset Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
your spring wardrobe, or anytime of year! One of the most popular and well-known gemstones, this
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Aquamarine

1.39ct Pear Pink Tourmaline Loose unset gemstone certified
Located in Jupiter, FL
Pink tourmaline,pear shape., certified! NATURAL GEMSTONE(S): Tourmaline Clarity/Color: Slightly
Category

21st Century and Contemporary Loose Gemstones

Materials

Tourmaline

Antique Hardstone Intaglio - Unset Gemstone - Europe - Early 20th Century
Located in Chatham, CA
Antique Roman style hardstone intaglio gemstone - hand carved male warrior in profile
Category

Early 20th Century European Classical Roman Loose Gemstones

Grey Violet Spinel Ring Gem 6.18 Carat Emerald Cut Loose Gemstone
By Merkaba
Located in Beverly Hills, CA
-class, unset gemstone collection.
Category

21st Century and Contemporary Burmese Contemporary Loose Gemstones

Materials

Spinel

Unheated Light Violet Sapphire Ring Gem 3.41 Carat Oval Loose Gemstone
By Merkaba
Located in Beverly Hills, CA
gemstone collector. The CDC gem certificate is attached to the image selection for your reference. Returns
Category

21st Century and Contemporary Malagasy Contemporary Loose Gemstones

Materials

Sapphire, Blue Sapphire, Purple Sapphire

2.48 Carats Total Weight, Pear Cut Tsavorite Garnet Lot, 3 Loose Gemstones
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This set of loose gemstones, aka a "lot*" in the trade, has three unset African tsavorite garnet
Category

21st Century and Contemporary Loose Gemstones

Materials

Garnet, Tsavorite

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

65.49 Carat Amethyst Oval, Unset Loose Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
pinkish-purple and bluish-purple highlights. This gemstone measures 29.00 x 23.00 x 17.75mm and can be set
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Amethyst

74.72 Carat Rectangular Aquamarine, Unset Loose Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
medium powder blue, this gemstone possesses superior clarity and superb faceting, allowing it to exhibit
Category

21st Century and Contemporary Brazilian Artisan Loose Gemstones

Materials

Aquamarine

7.25 Carat Aquamarine Oval, Unset Loose Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
11.70 x 7.67mm and is free of internal inclusions. This gemstone is a statement by itself but would be
Category

21st Century and Contemporary Brazilian Artisan Loose Gemstones

Materials

Aquamarine

7.25 Carat Aquamarine Oval, Unset Loose Gemstone
7.25 Carat Aquamarine Oval, Unset Loose Gemstone
Free Shipping
W 0.47 in D 0.31 in L 0.6 in
7.34 Carat Oval Peridot, Unset Loose Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
is an exceptionally lively gemstone. Anyone would be proud to wear such an impressive peridot
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Peridot

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 will make a gorgeous ring or pendant with its classic tanzanite color and near per...
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Tanzanite

.92 Carat Oval Unset Loose Ruby Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This beautiful, vivid red ruby would make a spectacular ring! It weighs .92 carat and has a bright, almost electric cherry red color with gorgeous pinkish highlights. It is eye clean...
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Ruby

1.24 Carat Oval Loose Unset Ruby Gemstone
By Sarosi By Timeless Gems
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

Rhodolite Garnet Gemstone Pair of 10.39 Carat Unset Oval Loose Gemstones
By Merkaba
Located in Beverly Hills, CA
extensive world-class loose gemstone collection.
Category

21st Century and Contemporary Unknown Modern Loose Gemstones

Materials

Garnet, Rhodolite

1.02 Oval Unset Unmounted Loose Pink Tourmaline Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
purplish pink hue and pleasing shape, this sparkling gemstone would make a very pretty ring or pendant for
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Rubelite, Tourmaline

1.42 Carat Tsavorite Garnet Oval, Unset Loose Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
, no other gemstone seems to capture the perfect shade of green for all seasons the way tsavorite
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Garnet, Tsavorite

.96 Carat Oval Loose Unset Fancy Sapphire Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
brilliant gemstone! This sapphire measures 6.52 x 4.88 x 3.42 millimeters, is eye clean, and it's beautiful
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Sapphire, Pink Sapphire

10.18 Carat Round Blue Zircon, Unset Loose Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
possibilities with this lively and brilliant gemstone are endless! Custom designs available. Please send us a
Category

21st Century and Contemporary Loose Gemstones

Materials

Zircon, Blue Zircon

5.61 Carat Pear Shaped Tanzanite, Unset Loose Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
gorgeous gemstone has excellent clarity, is well-proportioned and beautifully symmetrical. It measures
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Tanzanite

3.84 Carat Spessartite Garnet Oval, Unset Loose Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
own a spectacular and unique gemstone! Custom designs available. We have a large selection of
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Garnet

7.49 Carat Rose Zircon Oval, Unset Loose Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
9.67 x 6.51 millimeters, it is a sizeable gemstone, suitable for a ring or pendant. Fine quality rose
Category

21st Century and Contemporary Loose Gemstones

Materials

Zircon

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 depth of color that is generally only seen in much larger stones. Measuring 8.56 x 5....
Category

21st Century and Contemporary Zambian Artisan Loose Gemstones

Materials

Tanzanite

1.57 Carat Oval Unset Loose Unmounted Aquamarine Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This 1.57 carat aquamarine is of the finest quality, having an unusually dark, saturated color with exceptional clarity and brilliance. It measures 8.70 x 6.17 millimeters and it wou...
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Aquamarine

4.56 Carat Peridot, Pear Shape, Unset Loose Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This 4.56 carat pear shaped peridot would make a beautiful custom-made ring or pendant! It has gorgeous apple green color, a beautiful shape and eye-catching sparkle. Measuring 13.30...
Category

21st Century and Contemporary American Artisan Loose Gemstones

Materials

Peridot

2.77 Carat Oval Mandarin Garnet, Unset Loose Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This vibrant Mandarin orange colored garnet is absolutely beautiful! The unusual checkerboard design allows for exceptional brilliance and an exquisite display of color and life. Thi...
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Garnet, Mandarin Garnet

16.93 Carat Orange Zircon Cushion, Unset Loose Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This very fine, warm cinnamon colored zircon is an exceptional size with beautiful color and superior brilliance and clarity! Faceted as a cushion shape with excellent proportions, t...
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Zircon

19.34 Carat Blue Zircon Cushion, Unset Loose Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This brilliant, cushion cut gem checks all the boxes if you're looking for an unusually large, fine blue zircon to set in a ring or pendant enhancer! With intense "Windex" blue color...
Category

21st Century and Contemporary Loose Gemstones

Materials

Zircon, Blue Zircon

1.62 Carat Tsavorite Garnet Cushion, Unset Loose Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This pretty tsavorite garnet is so bright and lively! The perfect shade of spring green, this gem measures 7.01 x 6.88 x 3.70 millimeters and weighs 1.62 carats. It would be beautifu...
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Garnet, Tsavorite

3.66 Carat Unset Loose Pear Shaped Unmounted Tanzanite Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
, leaving no doubt that this is a classic example of the highly prized gemstone from Tanzania, Africa. With
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Tanzanite

2.00 Carat Blue Sapphire Oval Loose Unset Ring Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
crisp, medium blue color, this gemstone is nicely proportioned and bright, with both royal and brilliant
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Sapphire, Blue Sapphire

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

7.40 Carat Burgundy Rhodolite Garnet Cushion, Unset Loose Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
jewelry! It measures 12.21 x 10.09 x 6.57 millimeters and has the appearance of a larger gemstone. It is
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Garnet, Rhodolite

33.40 Carat Bi-Color Tourmaline Oval, Unset Loose Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
. This is a vibrant gemstone with extraordinary clarity and brilliance. With superior facetting and
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Tourmaline

4.72 Carat Pear Shaped Blue Zircon, Unset Loose Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
pendant or ring! Zircon is one of the most brilliant, lively natural gemstone varieties. This gem has
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Zircon, Blue Zircon

7.16 Carat Precious Imperial Topaz Oval, Unset Loose Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
exhibited in this gemstone make it easy to see why this color has been termed, "Imperial," with its rich
Category

21st Century and Contemporary Loose Gemstones

Materials

Topaz, Imperial Topaz

6.40 Carat Octagon Cut Golden Zircon, Unset Loose Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
, this warm, orangish yellow gemstone has been faceted as a modified radiant, giving it superior
Category

21st Century and Contemporary Loose Gemstones

Materials

Zircon

6.25 Carat Red Orange Zircon Pear, Unset Loose Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
its range of hues, brilliance and fire, zircon is a perfect gemstone for someone who wants something
Category

21st Century and Contemporary Sri Lankan Loose Gemstones

Materials

Zircon

3.28 Carat Bi-Color Watermelon Tourmaline, Unset Loose Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This pretty bi-color tourmaline is a beautiful marriage of pink and green of equal saturation, vibrance and clarity. While we have called this a "bi-colored" tourmaline because it di...
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Tourmaline

3.70 Carat Colombian Emerald, Unset Loose Gemstone, GIA Certified
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This spectacular 3.70 carat Colombian emerald has gorgeous color and remarkable clarity! It is vibrant green and highly saturated with a just a hint of beautiful blue! Measuring 9.67...
Category

21st Century and Contemporary Colombian Artisan Loose Gemstones

Materials

Emerald

1.37 Carat Emerald Oval, Unset Loose Gemstone, GIA Certified
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This vibrant, bright green emerald is an exceptional gem with gorgeous color and clarity! It is a 1.37 carat oval and extremely brilliant, with a subtle hint of beautiful blue! It me...
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Emerald

5.47 Carat Blue Zircon Square Octagon, Unset Loose Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This brilliant blue zircon has a gorgeous, medium "Windex" blue color and is extraordinarily lively! It is very well cut, with a modified brilliant cut pavilion and excellent proport...
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Zircon, Blue Zircon

3.37 Carat Emerald Cut Octagonal Loose Unset Aquamarine Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This 3.37 carat octagonal emerald-cut aquamarine is really impressive! It has a gorgeous blue color and exceptional brilliance and life. Measuring 13.97 x 7.16, it has an elegant elo...
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Aquamarine, Emerald

5.26 Carat Round Apple Green Peridot, Unset Loose Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This bright peridot has beautiful, open color and is so lively! It is an ideal apple green color and has exceptional clarity. Measuring 11.02 x 10.97 x 6.25 millimeters, it is a well...
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Peridot

1.76 Carat Brazilian Emerald, Unset Loose Gemstone, GIA Certified
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This beautiful 1.76 carat emerald is a gorgeous, vivid green color with exceptional clarity! Highly saturated with even coloring and lovely secondary hints of blue, this superior eme...
Category

21st Century and Contemporary Brazilian Artisan Loose Gemstones

Materials

Emerald

.85 Carat Cushion Cut Unset Loose Unmounted Red Spinel Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
spinel is so highly prized, especially by fine gemstone collectors. This is a truly beautiful gemstone
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Spinel

1.48 Carat Cushion Shaped Loose Unset Unmounted Red Spinel Gemstone
Located in Los Angeles, CA
prized gemstone in its own right, and for good reason. It comes in a rainbow of striking colors and is
Category

Antique 15th Century and Earlier Loose Gemstones

Materials

Spinel

6.66 Carat Cat’s Eye Chrysoberyl, Unset Loose Gemstone, GIA Certified
By Sarosi By Timeless Gems
Located in Los Angeles, CA
excellent luster. A purrr-fectly wonderful gemstone! Custom designs available. Please send us a message to
Category

21st Century and Contemporary Loose Gemstones

Materials

Chrysoberyl, Cat’s Eye

2.00 Carat Heart Shaped Ruby, Unset Loose Gemstone, GIA Certified
By Sarosi By Timeless Gems
Located in Los Angeles, CA
lovely gemstone is a timeless symbol of love! Custom designs available. Please send us a message to
Category

21st Century and Contemporary Thai Artisan Loose Gemstones

Materials

Ruby

1.46 Carat "Berry" Color Change Garnet Oval, Unset Loose Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
the light source and time of day, this gemstone appears bluish violet (in fluorescent or daylight
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Garnet

33.95 Carat Imperial Topaz Cushion, Unset Loose Gemstone, GIA Certified
By Sarosi By Timeless Gems
Located in Los Angeles, CA
large selection of unmounted collector gemstones in our inventory. Please inquire for details.
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Topaz, Imperial Topaz

Copper Tourmaline Ring Gem 3.15 Carat Round Unset Loose Gemstone
By Tamir
Located in Beverly Hills, CA
us for more details. For your convenience we carry an extensive world-class loose gemstone collection.
Category

21st Century and Contemporary Unknown Contemporary Loose Gemstones

Materials

Tourmaline, Other

Rhodolite Garnet Ring Gem 9.27 Carat Unset Oval Loose Gemstone
By Merkaba
Located in Beverly Hills, CA
Marvelous 9.27 carats Rhodolite Garnet gem, offered loose to a gemstone lover. Returns are accepted
Category

21st Century and Contemporary Unknown Modern Loose Gemstones

Materials

Garnet, Rhodolite

15.90 Carat Orange Imperial Topaz, Unset Loose Gemstone, GIA Certified\
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This peachy orange imperial topaz has spectacular color and a wonderfully elegant shape. It weighs 15.90 carats and is extremely clean, with exceptional brilliance and life! Beautif...
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Topaz, Imperial Topaz

Privately Curated Zircon Collection, Unset Loose Gemstones, 347.05 Carats Total
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This extraordinary suite of colored zircons is the private collection of one of our company's founders and is a rare opportunity to own the best of the best! 16 breathtaking zircon...
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Zircon

2.70 Carat Elongated Pear Shape Rubellite Tourmaline, Unset Loose Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This vibrant pink rubellite tourmaline pear would be beautiful set as a sleek, ultra-sophisticated pendant or modern ring! Weighing 2.70 carats, it has a gorgeous elongated shape and...
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Rubelite, Tourmaline

Unheated .75 Carat Padparadscha Sapphire, Unset Loose Gemstone, GIA Certified
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This unheated petite padparadscha packs a punch with its intense color, and is a brilliant way to celebrate Pantone's 2024 Color of The Year, fuzzy peach! Padparadscha sapphires are ...
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Sapphire, Padparadscha Sapphire

2.11 Carat Pink Sapphire Oval, Unset Loose Gemstone, GIA Certified
Located in Los Angeles, CA
This sapphire is an eye catching, vibrant purplish pink color measuring 9.09 x 6.70 x 3.39 millimeters and weighing 2.11 carats. This oval gem would make a lovely 3-stone or engageme...
Category

21st Century and Contemporary Unknown Artisan Loose Gemstones

Materials

Sapphire, Pink Sapphire

Natural Blue Aquamarine 8.55 Carat unset Elongated Emerald Cut Gemstone
Located in Trumbull, CT
Elongated Emerald Cut Aquamarine in vivid blue color is a natural loose stone. This flawless hand cut and polished gem measures 24.42mm x 6.56mm X 4.94mm and weighs 8.55 carat. It ca...
Category

21st Century and Contemporary Brazilian Loose Gemstones

Materials

Aquamarine

13.56 Carat Aquamarine Oval-Cut Unset Loose 3-Stone Ring Gemstone
By Gems Paradise
Located in Jaipur, IN
13.56 Carat Aquamarine Emerald-Cut Unset Loose 3-Stone Ring Gemstone Length: 10.12 mm Width: 12.74
Category

2010s Unknown Artisan Loose Gemstones

Materials

Aquamarine

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Unset Gemstones For Sale on 1stDibs

There is a broad range of unset gemstones for sale on 1stDibs. These distinct designs — crafted with great care and often made from 18k Gold, Gold and Platinum — can elevate any look. There are many different pieces in our collection of unset gemstones to choose from, but Artisan and Modern unset gemstones are of considerable interest. Sarosi By Timeless Gems, Tamir and Merkaba each produced beautiful examples of these items that are worth considering. Many pieces in our collection are stylish for most occasions, but Tourmaline versions, from our inventory of 30, can add a particularly distinctive touch to your look, day or night. A selection of oval cut, cushion cut and emerald cut can be found today on these pages. When shopping our range of unset gemstones, you’ll find that there are less available pieces for men today than there are for women.

How Much are Unset Gemstones?

On average, unset gemstones at 1stDibs sell for $4,675, while they’re typically $65 on the low end and $913,000 for the highest priced versions of this item.

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.