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Amethyst Ring Gem 18.48 Carat Square Octagon Loose Gemstone
By Merkaba
Located in Beverly Hills, CA
Impressive 18.48 carat, "loupe clean", Amethyst square octagon (Asscher Cut) gem, offered loose to
Category

21st Century and Contemporary Brazilian Modern Loose Gemstones

Materials

Amethyst, Quartz

29.70 Carat Natural Loose Sugarloaf Amethyst Cabochons For Jewellery
Located in Peshawar, PK
Loose Sugarloaf Amethyst Cabochon Weight: 29.70 Carats Sizes: 8.50, 11.95 And 9.05 Carat Colour
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

7.00 Carat Natural Loose Green Amethyst Pear Shape Gemstone
Located in Peshawar, PK
Gemstone Type : Green Amethyst Weight : 7.00 Carats Dimensions : 15.1 x 10.9 x 8.8 mm Origin
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

Amethyst Top Quality Fancy Shield Smooth Loose Gemstone For Jewelry
Located in Jaipur, RJ
Gemstone-Amethyst Shape - Shield Fancy size - 22 MM Weight - 38.74
Category

21st Century and Contemporary Loose Gemstones

Materials

Amethyst

5.35 Carat Natural Loose Purple Amethyst Cushion Cut Brazilian Gemstone
Located in Bangkok, TH
Stunning Natural Purple Amethyst Gemstone, available for sale at wholesale natural high quality
Category

21st Century and Contemporary Brazilian Modern Loose Gemstones

Materials

Amethyst

5.65 Carat Natural Loose Green Amethyst \ Prasiolite Pear Shape Gemstone
Located in Peshawar, PK
Loose Green Amethysts Weight: 5.45 Carats Dimension: 14 x 10 x 8 Mm Colour: Light Green Origin
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

8.45 Carats Natural Loose Purple Amethyst Gemstone For Jewelry Making
Located in Peshawar, PK
Faceted Amethyst Weight: 8.45 Carats Dimension: 13.6x11.1x8.7 Mm Origin: Brazil Color: Purple
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

6.20 Carat Natural Loose Purple Amethyst Emerald Cut from Brazil
Located in Peshawar, PK
Gemstone Type : Amethyst Weight : 6.20 Carats Dimensions : 12.1x9.4x7.8 mm Clarity : Eye Clean
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

Enchanting 11.40 Carat Marquise Shape Loose Green Amethyst Necklace Gemstone
Located in Peshawar, PK
Faceted Green Amethyst Weight: 11.40 Carat Dimension: 20.3x10.6x9.1 Mm Origin: Brazil Color: Green
Category

Antique Early 17th Century Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

4.13 Carat Ametrine (Amethyst / Citrine) Loose Unset Ring or Pendant Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
For the gemstone lover who can't decide between amethyst and citrine, ametrine, the gemstone that
Category

2010s American Loose Gemstones

Materials

Amethyst, Citrine

16.10 Carat Natural Loose Purple Amethyst Stone Cushion Cut Brazilian Gemstone
Located in Bangkok, TH
Shape Cut Cushion This 16.10 Carat Natural Loose Purple Amethyst displays a rich and regal violet
Category

21st Century and Contemporary Brazilian Modern Loose Gemstones

Materials

Amethyst

Gem Quality Amethyst Hand Carved Round Cabochon Loose Gemstone for Jewelry
Located in Jaipur, RJ
Natural Amethyst Carved Round Cabochon Loose Gemstones Weight: 71.80 Carats Size: 21 To 12 MM
Category

21st Century and Contemporary Brazilian Art Deco Loose Gemstones

Materials

Amethyst

Amethyst Hexagon 9.10 Carat Brazil Star of David Gem Loose Gemstone
By Merkaba
Located in Beverly Hills, CA
Unique 9.10 carat hexagon Amethyst gem offered loose to a lady or gentleman. The cutting pattern of
Category

21st Century and Contemporary Brazilian Contemporary Loose Gemstones

Materials

Amethyst, Quartz

8.15 Carat Natural Loose Purple Amethyst Custom Precision Cut Brazilian Gemstone
Located in Bangkok, TH
Shape Cut Custom Precision This 8.15 Carat Natural Loose Purple Amethyst is an exceptional gemstone
Category

21st Century and Contemporary Brazilian Modern Loose Gemstones

Materials

Amethyst

Gorgeous 15.40 Carat Natural Loose Dark Amethyst February Birthstone from Brazil
Located in Peshawar, PK
Gemstone Type : Amethyst Weight : 15.40 Carats Dimensions : 17.1x12.9x10.3 mm Clarity : SI Origin
Category

21st Century and Contemporary Brazilian Neoclassical Loose Gemstones

Materials

Amethyst

16.55 Carat Natural Loose Purple Amethyst Asscher Cut Gemstone from, Brazil
Located in Peshawar, PK
Gemstone Type : Amethyst Weight : 16.55 Carats Dimensions : 15.7X15.5X11.4 mm Clarity : Loupe Clean
Category

21st Century and Contemporary Brazilian Anglo-Indian Loose Gemstones

Materials

Amethyst

10.15 Carat Natural Loose Dual Amethyst Baguette Shape Gem For Earrings
Located in Peshawar, PK
Loose Dual Amethyst Weight: 10.15 Carats Dimension: 12.4 x 8.3 x 6.9 Mm And
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

4.25 Carats Emerald Cut Loose Light Green Amethyst Brazil Mine Gemstone
Located in Peshawar, PK
Faceted Green Amethyst Weight: 4.25 Carats Dimension: 10.4x8.4x7.4 Mm Origin: Brazil Shape
Category

2010s Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst, Quartz

6.60 Carat Natural Loose Green Amethyst Emerald Shape Gem For Jewellery
Located in Peshawar, PK
Gemstone Type : Green Amethyst Weight : 6.60 Carats Dimensions : 11.7 x 10.2 x 8.2 mm Origin
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

4.95 Carat Glamorous Loose Green Amethyst Asscher Shape Gem For Jewellery
Located in Peshawar, PK
Gemstone Type : Green Amethyst Weight : 4.95 Carats Dimensions : 10.2 x 9 x 7.5 mm Origin : Brazil
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

14.20 Carat Pixel Cut Natural Loose Purple Amethyst Gem from Brazil
Located in Peshawar, PK
Gemstone Type : Amethyst Weight : 14.20 Carats Dimensions : 19.3x11.1x9.1 mm Clarity : Eye Clean
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

Gorgeous 6.20 Carat Loose Dark Amethyst Asscher Cut for Jewellery Making
Located in Peshawar, PK
Gemstone Type : Amethyst Weight : 6.20 Carats Dimensions : 11.1x10.6x8 mm Clarity : Eye Clean
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

9.90 Carats Stunning Natural Loose Green Amethyst Prasiolite Pixel Cut Gem
Located in Peshawar, PK
Green Shape: Emerald Bar Cut: Pixel Cut / Pixelated Certificate: On Customer Demand Green amethyst
Category

21st Century and Contemporary Brazilian Anglo-Indian Loose Gemstones

Materials

Amethyst

17.35 Carat Natural Loose Purple Amethyst Asscher Cut for Jewelry Making
Located in Peshawar, PK
Faceted Amethyst Weight: 17.35 Carats Dimension: 16x16x11.8 Mm Origin: Brazil Color: Purple
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst, Quartz

5.30 Carat Natural Loose Green Amethyst Kite Shape Gem For Jewellery
Located in Peshawar, PK
Gemstone Type : Green Amethyst Weight : 5.30 Carats Dimensions : 18.5 x 10.7 x 7.5 mm Origin
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

Gorgeous 12.35 Carat Natural Loose Purple Amethyst Ring Gemstone From Brazil
Located in Peshawar, PK
Gemstone Type : Amethyst Weight : 12.35 Carats Dimensions : 15.7x13.6x10 mm Clarity : Clean Origin
Category

2010s Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

Amethyst Hexagon Star of David Gem 9.24 Carat Brazil Unmounted Loose Gemstone
By Merkaba
Located in Beverly Hills, CA
Unique 9.24 carat hexagon Amethyst gem offered loose to a special lady or gentleman. The cutting
Category

21st Century and Contemporary Brazilian Modern Loose Gemstones

Materials

Amethyst, Quartz

20.70 Carat Natural Loose Royal Purple Color Amethyst Cushion Cut Brazilian Gems
Located in Bangkok, TH
Shape Cut Fancy Cushion NA This magnificent 20.70 carat natural Amethyst features a luxurious royal
Category

21st Century and Contemporary Brazilian Modern Loose Gemstones

Materials

Amethyst

5.60 Carats Stunning Loose Purple Amethyst Gem From Brazil Mine February Stone
Located in Peshawar, PK
Faceted Amethyst Weight: 5.60 Carats Dimension: 12.5x9x7.3 Mm Origin: Brazil Shape: Emerald
Category

21st Century and Contemporary Brazilian Art Nouveau Loose Gemstones

Materials

Amethyst

Purple Natural Amethyst Pendant Loose Gemstone 12.15 Ct Flower Cushion Cut Jewel
Located in Peshawar, PK
Purple Natural Amethyst Pendant Loose Gemstone for Ring, Necklace Pendant, or any other Jewelry
Category

21st Century and Contemporary Brazilian Contemporary Loose Gemstones

Materials

Amethyst

8.15 Carat Natural Loose Light Amethyst Ring Gemstone from Brazil Earth Mine
Located in Peshawar, PK
Gemstone Type : Amethyst Weight : 8.15 Carats Dimensions: 12x11.9x9.6 mm Clarity : Clean Origin
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

Huge Natural 26.60 Carat Loose Dark Purple Amethyst Cushion Shape From Brazil
Located in Peshawar, PK
Gemstone Type : Amethyst Weight : 26.60 Carats Dimensions : 19.1x17.2x13.6 mm Clarity : Eye Clean
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

40.80 Carat Natural Loose Citrine And Amethyst Reverse Pair Emerald Shape Gem
Located in Peshawar, PK
Loose Citrine And Amethyst Reverse Pair Weight: 40.80 Carat Dimension Of Amethyst: 21 x 12.2 x
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Citrine, Amethyst

Stunning 7.85 Carats Loose Dark Purple Amethyst Ring Gem from Brazil Mine
Located in Peshawar, PK
Faceted Amethyst Weight: 7.85 Carats Origin: Brazil Shape: Long Cushion Color: Purple Certficate
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

8.50 Carat Gorgeous Natural Loose Round Flower Cut Amethyst Ring Gem from Brazil
Located in Peshawar, PK
Gemstone Type : Amethyst Weight : 8.50 Carats Dimensions : 13.1x12.9x9.8 Mm Clarity : Eye Clean(SI
Category

2010s Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

Elegant 6.05 Carat Natural Loose Emerald Cut Amethyst Ring Gem From Brazil Mine
Located in Peshawar, PK
Faceted Amethyst Weight: 6.05 Carat Dimension: 10.9x9.9x8.5 Mm Origin: Brazil Color: Purple Shape
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

7.25 Carat Natural Loose Green Amethyst Ring Gem Emerald Shape from Brazil Mine
Located in Peshawar, PK
Gemstone Type : Amethyst Weight : 7.25 Carats Dimensions : 15.4x9.5x7 mm Clarity : Eye Clean Origin
Category

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

Materials

Amethyst

3.65 Carat Natural Loose Prasolite Green Amethyst Pair Round Fancy Shape
Located in Peshawar, PK
Loose Green Amethyst Pair Weight: 3.65 Carat Dimension: 7.5 x 7.5 x 6 Mm 7.6 x 7.4 x 6 Mm Colour
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Aquamarine, Other

Natural Purple Rose Amethyst Gemstone 5.75 Carats Mix Cut Amethyst Gemstone
Located in Bangkok, TH
Natural Purple Rose Amethyst Gemstone, Available for sale at wholesale price natural high quality
Category

21st Century and Contemporary Brazilian Modern Loose Gemstones

Materials

Amethyst

7.28 Carat Deep Purple Amethyst
Located in Hua Hin, TH
Wonderful Amethyst. Classic Zambian material. Imbued with a superb color. 7.28 carat Oval Deep
Category

2010s Asian Loose Gemstones

Materials

Amethyst

2 Amethyst Cube Cts 26.42
Located in Hong Kong, HK
Illuminate your world with this pair. Each of these two exquisite amethyst cube stones is 10.1 x
Category

2010s Asian Contemporary Loose Gemstones

Materials

Amethyst

Custom Order Amethyst Round Beads 16mm
Located in Chesterland, OH
Two amethyst strands, 32 inches long (16 inches per strand). The total weight is 282 grams (9.9 oz
Category

21st Century and Contemporary American Loose Gemstones

Materials

Amethyst

76.81 Carat Purple Amethyst Collectors Stone
Located in Hua Hin, TH
A collector's 76.81 carat, Radiant-Cut Amethyst Gem. Shape: Oval Crown: Spiral Pavilion: Spiral
Category

2010s Unknown Loose Gemstones

Materials

Amethyst

52.78 Carat Purple Amethyst Collectors Stone
Located in Hua Hin, TH
A collector's 52.78 carat, Radiant-Cut Amethyst Gem. Shape: Octagon Crown: Step Pavilion: Step
Category

2010s Unknown Loose Gemstones

Materials

Amethyst

64.65 Carat Collector s Faceted Amethyst Gem
Located in Hua Hin, TH
Collectors Item: 64.65 carat rich purple, Amethyst Quartz. This eye-clean amethyst has a rich and
Category

2010s Thai Loose Gemstones

Materials

Quartz, Amethyst

23.30 Carat Natural Loose Ametrine Round Shape Gem
Located in Peshawar, PK
or bolivianite, Ametrine is a rare variety of quartz that combines the colors of amethyst and citrine
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst, Citrine

13.35 Carat Natural Loose Ametrine Asscher Cut Gemstone
Located in Peshawar, PK
bolivianite, Ametrine is a rare variety of quartz that combines the colors of amethyst and citrine in a single
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst, Citrine

5.00 Carat Natural Loose Ametrine Hexagon Cut Gemstone
Located in Peshawar, PK
bolivianite, Ametrine is a rare variety of quartz that combines the colors of amethyst and citrine in a single
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst, Citrine

20.60 Carat Natural Loose Ametrine Hexagon Cut Gemstone
Located in Peshawar, PK
bolivianite, Ametrine is a rare variety of quartz that combines the colors of amethyst and citrine in a single
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst, Citrine

19.10 Carat Natural Loose Ametrine Fancy Cut Gemstone
Located in Peshawar, PK
trystine or bolivianite, Ametrine is a rare variety of quartz that combines the colors of amethyst and
Category

21st Century and Contemporary Bolivian Arts and Crafts Loose Gemstones

Materials

Amethyst, Citrine

Elegant 2.51 Carat Deep Purple Amethyst Cabochon
Located in Hua Hin, TH
An elegant Deep Purple Amethyst Cabochon. Fantastic internal pattern. Imbued with a superb color
Category

2010s Asian Loose Gemstones

Materials

Amethyst

64.62 Carat Light Purple Amethyst Collectors Stone
Located in Hua Hin, TH
A collector's 64.62 carat, Mix-Cut Amethyst. 64.62 carat Oval Light Purple Amethyst Shape: Oval
Category

2010s Unknown Loose Gemstones

Materials

Amethyst

3.45 Carat Natural Loose Ametrine / Bolivianite Cushion Shape Gem
Located in Peshawar, PK
or bolivianite, Ametrine is a rare variety of quartz that combines the colors of amethyst and citrine
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst, Citrine

45.30 Carat Gigantic Natural Loose Ametrine Octagon Shape Gemstone
Located in Peshawar, PK
or bolivianite, Ametrine is a rare variety of quartz that combines the colors of amethyst and citrine
Category

21st Century and Contemporary Bolivian Arts and Crafts Loose Gemstones

Materials

Amethyst, Citrine

18.40 Carat Natural Loose Ametrine Pair Pixelated Cut Gemstone
Located in Peshawar, PK
or bolivianite, Ametrine is a rare variety of quartz that combines the colors of amethyst and citrine
Category

21st Century and Contemporary Bolivian Arts and Crafts Loose Gemstones

Materials

Amethyst, Citrine

8.65 Carat Natural Loose Ametrine from Brazil Purple Yellow Color
Located in Peshawar, PK
, you've been graced with amethyst as your birthstone. Amethyst falls in the quartz category and is easily
Category

21st Century and Contemporary Brazilian Victorian Loose Gemstones

Materials

Amethyst, Citrine

Gorgeous Loose Ametrine Gemstone 12.30 Carats Ametrine Ring Ametrine Jewellery
Located in Bangkok, TH
Gorgeous Loose Ametrine Gemstone of 12.30 carats from Bolivia has a wonderful cut in a Octagon
Category

21st Century and Contemporary Bolivian Modern Loose Gemstones

Materials

Amethyst, Citrine

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Loose Amethyst For Sale on 1stDibs

Surely you’ll find the exact loose amethyst you’re seeking on 1stDibs — we’ve got a vast assortment for sale. Frequently made of 18k Gold, Gold and Platinum, this item was constructed with great care. As it relates to this specific piece, our collection includes designs that are universally popular, but carat weights, specifically, are sought with frequency. A loose amethyst from Sarosi By Timeless Gems, Merkaba and Tamir — each of whom created a beautiful version of this treasured accessory — is worth considering. 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 asscher cut and cushion cut alternatives. There aren’t many items for women if you’re seeking a loose amethyst, as most of the options available are for men and unisex.

How Much is a Loose Amethyst?

On average, a loose amethyst at 1stDibs sells for $469, while they’re typically $65 on the low end and $13,500 for the highest priced versions of this item.

The Legacy of Amethyst in Jewelry Design

There are few gemstones in the world that are both affordable and worthy of a duchess’s attention. But then not many stones are as beautiful as amethyst. Indeed, vintage and antique amethyst jewelry has innumerable fans, and February’s birthstone has many unique attributes. For the romantics, there are several tales in Greek mythology that tell the story of Bacchus and Amethyste, a maiden that he pursues yet is rescued by Diane by turning her into a white stone. Bacchus, mourning his love, pours a glass of wine over the sculpture, dyeing her purple.

Amethyst has adorned many royal jewels. One of the most enviable jewelry collections of all time belonged to Wallis Simpson, the Duchess of Windsor. In 1947, the Duke gifted her with a Cartier amethyst and turquoise bib necklace. This special order piece was made with twisted 18-carat and 20-carat gold, platinum, brilliant- and baguette-cut diamonds, one heart-shaped faceted amethyst, 27 emerald-cut amethysts, one oval faceted amethyst, and turquoise cabochons. The Duchess was not the only Royal with a penchant for the purple gemstone. The tiara now owned by Queen Silvia of Sweden is set with amethysts that once belonged to the French Empress Josephine. A stunning 56-carat cushion-cut, square-shaped amethyst set in an 18-karat yellow gold necklace designed by Tiffany Co. is now in the collection of the Smithsonian National Museum of Natural History.

The Smithsonian also has in its possession an even more rare example of fine amethyst: the 96-carat Morris Amethyst Brooch. The brooch features a deep, rich purple heart-shaped amethyst. The museum states that the piece was likely made during the Edwardian period (1901–15) “when platinum and diamonds were often used, and amethyst, a favorite stone of King Edward VII’s wife, Alexandra, was often included in jewelry of the era.”

Another amethyst necklace, with an even richer story, can be found in the Natural History Museum of London. Known as the Delhi Purple Sapphire (even though the stone is an amethyst), this stone was stolen from the Temple of Indra during the Indian Mutiny of 1857. Anyone in possession of this stone is bound to have terrible luck, including its owner Edward Heron-Allen, who gifted the gemstone to the museum thinking that this would save him but ended up transferring the bad luck to the museum curators overseeing the stone.

Find a wide range of vintage and antique amethyst necklaces, bracelets and other fine jewelry on 1stDibs.

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.