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7.80 Carat Natural Loose Citrine Pixel Cut Gem For Necklace Jewellery
Located in Peshawar, PK
Loose Citrine Weight: 7.80 Carats Dimension: 15 x 9.9 x 7.9 Mm Origin: Brazil Cut: Pixelated
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Citrine

3.35 Carat Natural Loose Amethyst Cushion Shape Gem For Jewellery Making
Located in Peshawar, PK
Loose Amethyst Weight: 3.55 Carats Dimension: 10.6 x 8.9 x 6.4 Mm Colour: Purple Origin: Brazil
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

5.35 Carat Natural Loose Indicolite Tourmaline Emerald Shape Gem For Jewellery
Located in Peshawar, PK
Loose Indicolite Tourmaline Weight: 5.35 Carats Dimension: 11.3 x 8.7 x 6.2 Mm Colour: Blue Origin
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Tourmaline, Indicolite

1.45 Carat Natural Loose Green Tsavorite Garnet Gem Oval Cut Tanzanian Gemstone
Located in Bangkok, TH
Oval This 1.45 Carat Natural Loose Green Tsavorite Garnet is a rare and vibrant gemstone
Category

21st Century and Contemporary Tanzanian Modern Loose Gemstones

Materials

Garnet, Tsavorite

3.30 Carat Natural Loose Amethyst Cushion Shape Gem For Jewellery Making
Located in Peshawar, PK
Loose Amethyst Weight: 3.30 Carats Dimension: 10.1 x 9.2 x 5.9 Mm Colour: Purple Origin: Brazil
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

6.35 Carat Natural Loose Citrine Flower Cut Gem From Brazil Mine
Located in Peshawar, PK
Loose Citrine Weight: 6.35 Carats Dimension: 11.3 x 9.7 x 8.8 Mm Origin: Brazil Colour: Yellow
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Citrine

14.20 Carat Natural Loose Amethyst Octagon Shape Gem For Jewellery Making
Located in Peshawar, PK
Loose Amethyst Weight: 14.20 Carats Dimension: 18.5 x 11.7 x 9.6 Mm Colour: Purple Origin: Brazil
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

14.90 Carat Natural Loose Citrine Square Shape Gem For Necklace Jewellery
Located in Peshawar, PK
Loose Citrine Weight: 14.90 Carats Dimension: 14.9 x 14.9 x 11.2 Mm Origin: Brazil Colour: Yellow
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Citrine

3.55 Carats Natural Loose Aquamarine Ring Gem From Shigar Valley Mine
Located in Peshawar, PK
gem's tranquil and refreshing appearance. Aquamarine belongs to the beryl family of minerals, which
Category

21st Century and Contemporary Pakistani Aesthetic Movement Loose Gemstones

Materials

Aquamarine

3.35 Carat Natural Loose Amethyst Emerald Shape Gem For Jewellery Making
Located in Peshawar, PK
Loose Amethyst Weight: 3.35 Carats Dimension: 10.2 x 8.6 x 6.1 Mm Colour: Purple Origin: Brazil
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

2.50 Carat Natural Loose Amethyst Oval Shape Gem For Jewellery Making
Located in Peshawar, PK
Loose Amethyst Weight: 2.50 Carats Dimension: 9.5 x 8.1 x 6 Mm Colour: Purple Origin: Brazil
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

3.95 Carat Natural Loose Amethyst Oval Shape Gem For Jewellery Making
Located in Peshawar, PK
Loose Amethyst Weight: 3.95 Carats Dimension: 12.5 x 8.4 x 6.5 Mm Colour: Purple Origin: Brazil
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

18.40 Carat Natural Loose Citrine Laser Cut Gem For Necklace Jewellery
Located in Peshawar, PK
Loose Citrine Weight: 18.40 Carats Dimension: 18.7 x 14.3 x 10.9 Mm Origin: Brazil Colour: Yellow
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Citrine

13 Carat Natural Loose Amethyst Emerald Shape Gem For Jewellery Making
Located in Peshawar, PK
Loose Amethyst Weight: 13 Carats Dimension: 12.6 x 14.1 x 11.9 Mm Colour: Purple Origin: Brazil
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

10.65 Carat Natural Loose Amethyst Tear Drop Shape Gem For Necklace
Located in Peshawar, PK
Loose Amethyst Weight: 10.65 Carats Dimension: 20 x 10.9 x 9.1 Mm Colour: Purple Origin: Brazil
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

Certified Natural 1.10 Carat Loose Sapphire Cushion Shape Gem For Ring
Located in Peshawar, PK
Loose Sapphire Weight: 1.10 Carats Dimension: 5.5 x 5.3 x 3.9 Mm Colour: Greenish Blue Origin
Category

21st Century and Contemporary Central African Arts and Crafts Loose Gems...

Materials

Sapphire

9.40 Carat Natural Loose Amethyst Long Emerald Shape Gem For Necklace
Located in Peshawar, PK
Loose Amethyst Weight: 9.40 Carats Dimension: 17.2 x 9.3 x 8.2 Mm Colour: Purple Origin: Brazil
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

4.80 Carat Natural Loose Spessartine Garnet Emerald Shape Gem For Jewellery
Located in Peshawar, PK
Loose Spessartine Garnet Weight: 4.80 Carats Dimension: 11 x 8.7 x 5.8 Mm Colour: Orange Treatment
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Mandarin Garnet

1.10 Carat Natural Loose Reverse Color Tourmaline Pair Trilliant Cut Afghan Gems
Located in Bangkok, TH
brilliance, symmetry, and modern sophistication, giving each gem exceptional presence. With excellent clarity
Category

21st Century and Contemporary Afghan Modern Loose Gemstones

Materials

Tourmaline

Glamorous 5.00 Carats Cushion Shape Loose Purple Amethyst Gem For Ring
Located in Peshawar, PK
Loose Amethyst Weight: 5.00 Carat Dimension: 11.1 x 10.3 x 7.4 Mm Colour: Purple Origin: Brazil
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

3.60 Carat Natural Loose Citrine Octagon Shape Gem From Earth Mine
Located in Peshawar, PK
Loose Citrine Weight: 3.60 Carats Dimension: 9.6 x 8.8 x 6.8 Mm Origin: Brazil Colour: Yellow And
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Citrine

5.65 Carat Natural Loose Citrine Round Shape Gem For Jewellery Making
Located in Peshawar, PK
Loose Citrine Weight: 5.65 Carats Dimension: 11.7 x 11.7 x 8.1 Mm Origin: Brazil Colour: Honey
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Citrine

4.45 Carat Natural Loose Citrine Emerald Shape Gem For Jewellery Making
Located in Peshawar, PK
Loose Citrine Weight: 4.45 Carats Dimension: 12 x 8.2 x 7 Mm Origin: Brazil Colour: Orange And
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Citrine

8.65 Carat Natural Loose Citrine Cushion Shape Gem From Earth Mine
Located in Peshawar, PK
Loose Citrine Weight: 8.65 Carats Dimension: 13.9 x 10.9 x 8.4 Mm Origin: Brazil Colour: Honey
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Citrine

9.84 Carat Heart-Cut Colombian Emerald Loose Natural Heart-Shaped Gem
Located in Jupiter, FL
Stone: Emerald Weight: 9.84-carats Shape: Heart Cut Clarity: Transparent Luster: Very Good Color: Medium Yellowish Green Measurements: 13.29mm x 15.68mm x 8.10mm Geographic Origin: C...
Category

2010s Colombian Modern Loose Gemstones

Materials

Emerald

2.45 Carats Natural Loose Citrine Emerald Shape Gem From Earth Mine
Located in Peshawar, PK
Loose Citrine Weight: 2.45 Carats Dimension: 8.9 x 7.7 x 5.7 Mm Origin: Brazil Colour: Honey Brown
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Citrine

2.25 Carat Natural Loose Indicolite Tourmaline Emerald Shape Gem For Jewellery
Located in Peshawar, PK
Loose Indicolite Tourmaline Weight: 2.25 Carats Dimension: 7.5 x 6.3 x 4.8 Mm Colour: Blue Origin
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Indicolite

9.95 Carat Natural Loose Citrine Hexagon Cut Gem For Jewellery Making
Located in Peshawar, PK
Loose Citrine Weight: 9.95 Carats Dimension: 14.7 x 11.3 x 9.2 Mm Origin: Brazil Colour: Honey
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Citrine

3.10 Carat Natural Loose Indicolite Tourmaline Emerald Shape Gem For Jewellery
Located in Peshawar, PK
Loose Indicolite Tourmaline Weight: 3.10 Carats Dimension: 10.3 x 7 x 5 Mm Colour: Blue Origin
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Indicolite

3.15 Carats Natural Loose Trillion Cut Citrine Gem From Earth Mine
Located in Peshawar, PK
Loose Citrine Weight: 3.15 Carats Dimension: 10.1 x 9.8 x 6.1 Mm Origin: Brazil Colour: Honey
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Citrine

1.45 Carat Natural Loose Indicolite Tourmaline Emerald Shape Gem For Ring
Located in Peshawar, PK
Loose Indicolite Tourmaline Weight: 1.45 Carats Dimension: 7.1 x 5.6 x 3.9 Mm Colour: Blue Origin
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Indicolite, Tourmaline

7.30 Carats Natural Loose Ametrine Oval Shape Gem For Jewellery Making
Located in Peshawar, PK
Loose Ametrine Weight: 7.30 Carat Dimension: 16 x 11.5 x 8.3 Mm Origin: Brazil Treatment: Non
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Quartz

0.95 Carat Natural Loose Emerald Oval Shape Gem For Jewellery Making
Located in Peshawar, PK
Loose Emerald Weight: 0.95 Carats Dimension: 9 x 5.4 x 3 Mm Colour: Green Origin: Swat, Pakistan
Category

21st Century and Contemporary Pakistani Arts and Crafts Loose Gemstones

Materials

Emerald

7.95 Carat Natural Loose Oval Shape Ametrine Gem For Jewellery Making
Located in Peshawar, PK
Loose Ametrine Weight: 7.95 Carat Dimension: 15.1 x 11.4 x 9.4 Mm Origin: Brazil Treatment: Non
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Quartz

6.20 Carats Natural Loose Pear Shape Ametrine Gem For Jewellery Making
Located in Peshawar, PK
Loose Ametrine Weight: 6.20 Carat Dimension: 13.9 x 10.5 x 8.5 Mm Origin: Brazil Treatment: Non
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Quartz

2.55 Carats Natural Loose Emerald Shape Green Tourmaline Gem For Ring
Located in Peshawar, PK
Loose Green Tourmaline Weight: 2.55 Carats Dimension: 8.5 x 6.5 x 5.5 Mm Colour: Green Origin
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Tourmaline

1.65 Carat Natural Loose Emerald Shape African Tourmaline Gem For Ring
Located in Peshawar, PK
Loose Colourless Tourmaline Weight: 1.65 Carats Dimension: 7.1 x 5.9 x 5.5 Mm Origin: Africa
Category

21st Century and Contemporary Central African Arts and Crafts Loose Gems...

Materials

Tourmaline

1.65 Carat Natural Loose Mint Tourmaline Emerald Shape Gem For Jewellery
Located in Peshawar, PK
Loose Tourmaline Weight: 1.65 Carats Dimension: 6.7 x 5.8 x 5 Mm Origin: Kunar Afghanistan Shape
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Tourmaline

2.35 Carats Natural Loose Spessartine Garnet Emerald Shape Gem For Ring
Located in Peshawar, PK
Loose Spessartine Garnet Weight: 2.35 Carats Dimension: 8.3 x 6.5 x 5.1 Mm Colour: Orange Treatment
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Garnet

1.80 Carat Natural Loose Spessartine Garnet Emerald Gem For Jewellery Making
Located in Peshawar, PK
Loose Spessartine Garnet Weight: 1.80 Carats Dimension: 7.8 x 5.7 x 4.5 Mm Colour: Orange
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Mandarin Garnet

12.65 Carat Natural Loose Lemon Quartz Octagon Shape Gem For Necklace
Located in Peshawar, PK
Loose Lemon Quartz Weight: 12.65 Carats Dimension: 15.8 x 13.4 x 10.4 Mm Colour: Yellow Treatment
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Quartz

2.95 Carats Natural Loose Green Tourmaline Emerald Shape Gem For Ring
Located in Peshawar, PK
Loose Green Tourmaline Weight: 2.95 Carats Dimension: 9.8 x 6.1 x 5.3 Mm Colour: Green Origin
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Tourmaline

4.50 Carats Natural Loose Indicolite Tourmaline Loupe Clean Quality Ring Gem
Located in Peshawar, PK
Loose Indicolite Tourmaline Weight: 4.50 Carats Dimension: 10.4x8.8x5.7 Mm Origin: Kunar
Category

21st Century and Contemporary Afghan Art Nouveau Loose Gemstones

Materials

Tourmaline, Indicolite

6.00 Carat Natural Loose Light Blue Aquamarine Stone Emerald Cut Pakistani Gem
Located in Bangkok, TH
Emerald The 6.00 Carat Natural Loose Light Blue Aquamarine is a stunning gemstone admired for its
Category

21st Century and Contemporary Pakistani Modern Loose Gemstones

Materials

Aquamarine

23.55 Carats Gorgeous Purple Loose Amethyst Necklace Gem From Brazil Mine
Located in Peshawar, PK
make it a gem that continues to captivate and inspire. Whether adorning jewelry or used for
Category

21st Century and Contemporary Brazilian Anglo-Indian Loose Gemstones

Materials

Amethyst

6.50 Carat Natural Loose Green Amethyst Pear Shape Gem For Jewellery
Located in Peshawar, PK
Gemstone Type : Green Amethyst Weight : 6.50 Carats Dimensions : 15.7 x 10.8 x 8 mm Clarity : Eye Clean Origin : Brazil Color: Green Shape: Pear Certificate: On Demand Month: Febru...
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

Huge 73.40 Carats Natural Loose Clear Quartz Gem For Necklace Jewelry
Located in Peshawar, PK
Loose Quartz Weight: 73.40 Carats Dimension: 26x23x20 Mm Origin: Brazil Color: Light Gold Shape
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Quartz

8.05 Carat Natural Loose Green Amethyst Heart Shape Gem For Jewellery
Located in Peshawar, PK
Gemstone Type : Green Amethyst Weight : 8.05 Carats Dimensions : 12.6 x 13.2 x 9.5 mm Clarity : Eye Clean Origin : Brazil Color: Green Shape: Heart Certificate: On Demand Month: Fe...
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

Gorgeous 6.85 Carat Natural Loose Purple Amethyst Ring Gems Emerald Shape
Located in Peshawar, PK
exquisite specimens, coveted by collectors and jewelers alike. The gem's value depends on factors such as
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

2.30 Carat Loose Light Blue Aquamarine Stone Cushion Cut Natural Pakistani Gem
Located in Bangkok, TH
Cushion Cut Fancy Cushion NA This beautiful 2.30 carat loose Light Blue Aquamarine is a natural gemstone
Category

21st Century and Contemporary Pakistani Modern Loose Gemstones

Materials

Aquamarine

4.70 Carat lovely Loose Green Amethyst Octagon Shape Gem For Necklace
Located in Peshawar, PK
Gemstone Type : Green Amethyst Weight : 4.70 Carats Dimensions : 11.2 x 9 x 7.2 mm Clarity : Eye Clean Origin : Brazil Color: Green Shape: Square Certificate: On Demand Month: Febr...
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

10.05 Carat Natural Loose Green Amethyst Pixel Cut Gem For Necklace
Located in Peshawar, PK
Gemstone Type : Green Amethyst Weight : 10.05 Carats Dimensions : 18.8 x 9.2 x 7.1 mm Clarity : Eye Clean Origin : Brazil Color: Green Shape: Emerald Certificate: On Demand Month: ...
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

3.85 Carat Natural Loose Imperial Topaz Round Shape Gem Slightly Included
Located in Peshawar, PK
Faceted Imperial Topaz Weight: 3.85 Carats Dimension: 9.4 x 9.3 x 5.8 Mm Origin: Katlang Pakistan Shape: Round Cushion Color; light Yellow Treatment: Non Certificate: On Demand Imp...
Category

21st Century and Contemporary Pakistani Arts and Crafts Loose Gemstones

Materials

Imperial Topaz

1.95 Carat Natural Loose Tanzanite Square Shape Gem For Jewellery Making
Located in Peshawar, PK
Faceted Tanzanite Weight: 1.95 Carats Dimension: 8 x 7.9 x 4.5 Mm Shape: Square Color: Blue Treatment: Non Certificate: On Demand . Hardness. Tanzanite is a slightly soft stone when...
Category

21st Century and Contemporary Tanzanian Arts and Crafts Loose Gemstones

Materials

Tanzanite

8.85 Carat Natural Loose Madeira Fire Citrine Fancy Asscher Cut Brazilian Gem
Located in Bangkok, TH
Shape Cut Asscher Fancy This 8.85 Carat Natural Loose Madeira Fire Citrine dazzles with its rich
Category

21st Century and Contemporary Brazilian Modern Loose Gemstones

Materials

Citrine

5.65 Carats Natural Loose Sugarloaf Cabochon Indicolite Tourmaline Gem For Ring
Located in Peshawar, PK
Indicolite Tourmaline Sugarloaf Cabochon Weight: 5.65 Carats Dimension: 9.4 x 8.4 x 8.3 Mm Colour: Blue Origin: Afghanistan Treatment: Non Certificate: On Demand Indicolite t...
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Indicolite

16.50 Carat Natural Loose Fine Quality Green Tourmaline Cushion Cut Afghan Gem
Located in Bangkok, TH
Chakra. This gem’s fine quality and natural origin make it a rare treasure, ideal for a statement ring or
Category

21st Century and Contemporary Afghan Modern Loose Gemstones

Materials

Tourmaline

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Loose Gems For Sale on 1stDibs

Browse a vast assortment of loose gems for sale on 1stDibs. These distinct designs — crafted with great care and often made from 18k Gold, Gold and Platinum — can elevate any look. Our collection of these items for sale includes 3 vintage editions and 324 modern creations to choose from as well. Our inventory is broad and distinctive, with accessories on offer that were made as long ago as the 18th Century to those produced as recently as the 21st Century. Our collection of loose gems includes designs that are universally popular, but Contemporary and Modern styles, specifically, are sought with frequency. Merkaba, Sarosi By Timeless Gems and Tamir each produced beautiful examples of these items that are worth considering. Browse our collection of 87 Tourmaline versions today to add the perfect touch to your look. A selection of oval cut, cushion cut and emerald cut can be found today on these pages. When shopping our range of loose gems, you’ll find that there are less available pieces for men today than there are for women.

How Much are Loose Gems?

Prices for loose gems start at $65 and top out at $325,000 with these rings, on average, selling for $5,721.

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.