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1 Carat Loose Gemstones

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7.33 Carat Ethiopian Opal Gemstone Oval 17x12.5mm Loose Gemstone
Located in Columbus, OH
Presenting a 7.33 carat ethiopian opal loose gemstone. Nothing beats this gem’s play-of-color! This
Category

2010s American Art Deco Loose Gemstones

Materials

Opal

0.59 Carat Imperial Topaz Gemstone Pear shape 10x4mm Loose Gemstone
Located in Columbus, OH
Presenting a 0.59 carat Imperial Topaz gemstone! A valuable addition to to any collection or
Category

2010s American Loose Gemstones

Materials

Topaz, Imperial Topaz

6.17 Carat Pink Cushion Cut Tourmaline Loose Gemstone
Located in Stamford, CT
gemstone. 1 Cushion cut tourmaline, approx. total weight. 6.17cts 10.90x10.91x8.02 Thank you for
Category

21st Century and Contemporary Loose Gemstones

Materials

Tourmaline

1.01 Carat Brazilian Opal Loose Gemstone Marquise 13x5mm
Located in Columbus, OH
Presenting a 1.01 carat marquise shape brazilian opal gemstone! Nothing beats this gem’s play-of
Category

2010s American Art Deco Loose Gemstones

Materials

Opal

1.59 Carat Grey Spinel Gemstone Heart Shape 8 x 7mm Loose Gemstone
Located in Columbus, OH
Presenting a 1.59 carat Grey Spinel gemstone! This gemstone's brilliance and clarity makes it a
Category

2010s American Loose Gemstones

Materials

Spinel

0.94 Carat Australian Boulder Opal Loose Gemstone Trillion 7x6.5mm
Located in Columbus, OH
Presenting a 0.94 carat australian boulder opal loose gemstone! Specifications Stone: Boulder
Category

2010s American Loose Gemstones

Materials

Opal

Elongated 15.86 Carat Rutilated Quartz Loose Gemstone EM 20x15mm
Located in Columbus, OH
Presenting an elongated emerald cut 15.86 carat rutilated quartz loose gemstone! This gemstone
Category

2010s American Modern Loose Gemstones

Materials

Quartz

Elongated 2.32 Carat Brazilian Opal Loose Gemstone Oval 13x7mm
Located in Columbus, OH
Presenting a 2.32 carat oval brazilian opal gemstone! Nothing beats this gem’s play-of-color! This
Category

2010s American Modern Loose Gemstones

Materials

Opal

GIA Certified 25.04 Carat Natural Chrysoberyl Cat's Eye Loose Gemstone
Located in Stamford, CT
Chrysoberyl to form over 15.00 carats, making this a unique gemstone perfect for a ring or pendant. 1 oval
Category

21st Century and Contemporary Loose Gemstones

Materials

Chrysoberyl

2.00 Carat Natural Loose Cushion Shape Colourless African Tourmaline Gemstone
Located in Peshawar, PK
Loose Tourmaline Weight: 2.00 Carats Dimension: 7.9 x 7 x 5.2 Mm Colour: Colourless Origin
Category

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

Materials

Tourmaline

2.25 Carats Loose Red Rhodolite Garnet Gemstone From Madagascar Mine
Located in Peshawar, PK
Faceted Rhodolite Garnet Weight: 2.25 Carats Dimension: 7.6x7.4x5.1 Mm Origin: Madagascar Africa
Category

21st Century and Contemporary Malagasy Arts and Crafts Loose Gemstones

Materials

Garnet, Rhodolite

1.27 Carats Loose Round Cut Emerald from Colombia Genuine Green Gemstone
Located in Bradenton, FL
Beautiful loose round cut genuine natural emerald in 1.27 carats weight from Colombia. Its
Category

2010s Colombian Loose Gemstones

Materials

Emerald

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

21st Century and Contemporary Congolese Contemporary Loose Gemstones

Materials

Tourmaline

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

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

10.74 Carat Loose Radiant Cut Light Green Emerald Gemstone
Located in Scottsdale, AZ
This extraordinary loose emerald, boasting a substantial weight of 10.74 carats, commands attention
Category

21st Century and Contemporary Unknown Contemporary Loose Gemstones

Materials

Emerald, Green Beryl

10.74 Carat Loose Radiant Cut Light Green Emerald Gemstone
10.74 Carat Loose Radiant Cut Light Green Emerald Gemstone
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W 0.5 in D 0.35 in L 0.56 in
Rare Green Emerald Cut Natural Tourmaline Loose Gemstone, 5.35 Carat-Afghani
Located in Peshawar, PK
Magnificent yellowish green Natural Tourmaline Loose Gemstone, that has been finely cut and
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Natural Mozambique Red Loose Ruby Stone 0.85 carats Oval Shaped Gemstone
Located in Bangkok, TH
Gemstone Type Natural Ruby Gemstone Weight 0.85 Carats Dimensions 7.1 x 5.7 x 2.4 mm Clarity VVS
Category

21st Century and Contemporary Mozambican Modern Loose Gemstones

Materials

Ruby

Rare Green Cushion Cut Natural Tourmaline Loose Gemstone, 5.05 Carat-Afghanistan
Located in Peshawar, PK
excellent luster. Gemstone Type: Tourmaline Weight: 5.05 Carats Dimensions: 8.78 x 9.99 x 7.44 mm Color
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Green Peridot Cushion Cut Natural Loose Gemstones, 4.90 Carat from Pakistan
Located in Peshawar, PK
Introducing our exquisite Magnificent Green Peridot Gemstones sourced from the renowned Supat Mine
Category

21st Century and Contemporary Pakistani Contemporary Loose Gemstones

Materials

Peridot

Green Peridot Cushion Cut Natural Loose Gemstones, 4.90 Carat from Pakistan
Green Peridot Cushion Cut Natural Loose Gemstones, 4.90 Carat from Pakistan
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H 0.34 in W 0.31 in D 0.21 in Dm 0.3 in L 0.32 in
8.80 Carat Together Natural Loose Amethyst Gemstone Cushion Cut Ring Gems
Located in Peshawar, PK
Gemstone Type : Amethyst Weight : 8.80 Carats 1 ( 5.40 Cts, 12x9.3x7.1 Mm) 2( 3.30 Cts, 9.6x8.2x7
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

7.90 Carat Natural Yellow Canary Tourmaline Loose Gemstone For Jewelry Making
Located in Peshawar, PK
Faceted Tourmaline Weight: 7.90 Carats Dimension: 13.6x12.2x7.8 Mm Origin: Madagascar Africa
Category

21st Century and Contemporary Malagasy Arts and Crafts Loose Gemstones

Materials

Tourmaline

Huge 25.70 Carats Loose Sky Blue Topaz Gemstone For Necklace Jewelry
Located in Peshawar, PK
Faceted Blue Topaz Weight: 25.70 Carats Dimensions: 17.1x17.1x11.8 Mm Origin: Brazil Color: Blue
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Imperial Topaz, Blue Topaz, Topaz

0.80 Carats Oval Shaped Natural Mozambique Loose Red Ruby Gemstone VVS Clarity
Located in Bangkok, TH
Gemstone Type Natural Ruby Gemstone Weight 0.80 Carats Dimensions 6.8 x 5.3 x 2.8 mm Clarity VVS
Category

21st Century and Contemporary Mozambican Modern Loose Gemstones

Materials

Ruby

Rare Vivid Seafoam Natural Tourmaline Loose Gemstone, 5.55 Carat-Cushion Cut Afg
Located in Peshawar, PK
gemstone weighs 5.55 carats and boasts a mesmerizing luster with impeccable loupe clean clarity. Perfect
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

5.20 Carat Natural Cushion Cut No Heat Loose Violet Blue Sapphire Gemstone
Located in Stamford, CT
brilliance. Certified by the AGL as natural, no heat, no enhancements. Bright face up appearance. 1 cushion
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire, Blue Sapphire, Purple Sapphire

Rare Pink Natural Tourmaline Loose Gemstone, 2.65 Carat Cushion Cut for Ring Afg
Located in Peshawar, PK
Gemstone Type: Tourmaline Weight: 2.65 Carats Dimensions: 8.61 x 7.16 x 6.19 Color: Pink Clarity
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

2.40 Carat Gorgeous Fire Loose Sphene Gemstone From Pakistan Mine Oval Shape
Located in Peshawar, PK
the benefits of sphene: 1. **Aesthetic Beauty**: Sphene is admired for its exceptional dispersion
Category

21st Century and Contemporary Pakistani Arts and Crafts Loose Gemstones

Materials

Hematite, Alexandrite

GIA Certified 28.37 Carat Imperial Precious Topaz Emerald Cut Loose Gemstone
Located in Stamford, CT
28.37ct Imperial precious Topaz. This GIA certified natural gemstone is unique in its color, orange
Category

21st Century and Contemporary Loose Gemstones

Materials

Topaz

Yellow Sapphire Lozenge Cut Natural Heated, Loose Gemstone
Located in South Melbourne, AU
shape of over 1 carat with linear facets revealing a vivid yellow hue. Colour and clarity has been
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Sapphire

Yellow Sapphire Lozenge Cut Natural Heated, Loose Gemstone
Yellow Sapphire Lozenge Cut Natural Heated, Loose Gemstone
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W 0.26 in D 0.13 in L 0.38 in
Blue Topaz Square Cut Stone Natural Loose Gemstone
Located in Jaipur, RJ
2 Pieces / 1 Pair 18.15 Ct Weight 11 mm Size
Category

21st Century and Contemporary Brazilian Art Deco Loose Gemstones

Materials

Topaz, Blue Topaz

Padparadscha Sapphire 1.21 Ct Cushion Natural Heated, Loose Gemstone
Located in South Melbourne, AU
due to their rarity and beauty. Hand crafted into a softly shaped cushion of over 1 carat this natural
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Sapphire

34.49 Carats Top Quality Rubellite Tourmaline Oval 1 Pieces Natural Gemstone
Located in Jaipur, RJ
Gemstone - Rubellite Tourmaline Weight - 34.49 Ct Size - 17x23 MM Piece - 1 Shape - Oval
Category

21st Century and Contemporary Unknown Loose Gemstones

Materials

Rubelite, Tourmaline

Australian Chrysoprase Carved Fancy Pair Marlborough Mines Loose Gemstone
Located in Jaipur, RJ
Size 16x23 mm Weight 62.20 cts 1 Pair
Category

21st Century and Contemporary Australian Art Deco Loose Gemstones

Materials

Chrysophrase

Mint Green Sapphire 1.69 ct Radiant Cut Unheated, Loose Gemstone
Located in South Melbourne, AU
to over 1 carat and certified unheated from Madagascar. This mint green sapphire is available to
Category

21st Century and Contemporary Malagasy Modern Loose Gemstones

Materials

Sapphire

Zambian Emerald Fancy Crown Carved Cabochon Loose Gemstone for Jewelry
Located in Jaipur, RJ
Weight: 12.01 Carats Size: 15x22 MM Pieces: 1 Shape: Carved Cabochon
Category

21st Century and Contemporary Zambian Art Deco Loose Gemstones

Materials

Emerald

Lustrous Zambian Emerald Fancy Marquise Cabochon Loose Gemstone for Jewelry
Located in Jaipur, RJ
Weight: 4.50 Carats Size: 16x9x5 MM Pieces: 1 Shape: Smooth Marquise Cabochon
Category

21st Century and Contemporary Zambian Art Deco Loose Gemstones

Materials

Emerald

Rare Cat Eye Aquamarine Sugarloaf Cabochon Loose Gemstone for Jewelry
Located in Jaipur, RJ
direct overhead light is spotted. Weight: 22.84 Carats Size: 19x15 MM Pieces: 1
Category

21st Century and Contemporary Mozambican Art Deco Loose Gemstones

Materials

Aquamarine

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

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Rare Tricolor Watermelon Tourmaline Loose Gemstone, 4.95 Ct-Long Emerald/Octagon
Located in Peshawar, PK
Gorgeous Tricolor Watermelon Natural Tourmaline Loose Gemstone! Meticulously crafted in an
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Rare Watermelon Bicolor Natural Tourmaline Loose Gemstones 7.25 Ct for Earrings
Located in Peshawar, PK
GEMSTONE TYPE: Tourmaline PIECE(S): 1 WEIGHT: 7.25 Carats SHAPE: Emerald SIZE (MM): 3.90 Carat
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Rare Watermelon Bicolor Natural Tourmaline Loose Gemstones 7.25 Ct for Earrings
Rare Watermelon Bicolor Natural Tourmaline Loose Gemstones 7.25 Ct for Earrings
Free Shipping
H 0.47 in W 0.27 in D 0.21 in Dm 0.26 in L 0.5 in
Rare Huge Blue Topaz Pear Faceted Stone Natural Loose Gemstone
Located in Jaipur, RJ
1 piece 133.80Ct Weight 30x43 mm Size
Category

2010s Brazilian Art Deco Loose Gemstones

Materials

Topaz, Blue Topaz

Seafoam & Bluish Green Natural Tourmaline Loose Gemstones reverse pair, 3.85 Ct
Located in Peshawar, PK
Elevate your jewelry creations with these enchanting natural Tourmaline Loose Gemstones. Skillfully
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Lustrous Vivid Green Zambian Emerald Carved Leaf Loose Gemstone for Jewelry
Located in Jaipur, RJ
Zambian Emerald Carved Leaf Cabochon Loose Gemstone for Jewelry Weight: 6.50 Carats Size: 18x11x6
Category

21st Century and Contemporary Zambian Art Deco Loose Gemstones

Materials

Emerald

Vivid Canary Yellow Sapphire 1.55 Ct Pear Ceylon Heated, Loose Gemstone
Located in South Melbourne, AU
Natural summery vivid canary yellow sapphire traditionally cut into a pear shape of over 1 carat to
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Sapphire

Zambian Emerald Carved Cabochon Antique Pendant Style Loose Gemstone for Jewelry
Located in Jaipur, RJ
Weight: 19.25 Carats Size: 19x16x9 MM Pieces: 1 Shape: Carved Cabochon
Category

21st Century and Contemporary Zambian Art Deco Loose Gemstones

Materials

Emerald

Zambian Emerald Carved Cabochon Antique Pendant Style Loose Gemstone for Jewelry
Located in Jaipur, RJ
Weight: 49.36 Carats Size: 26x20x13 MM Pieces: 1 Shape: Carved Cabochon
Category

21st Century and Contemporary Zambian Art Deco Loose Gemstones

Materials

Emerald

Rare Green Natural Tourmaline Loose Gemstone 2.10Ct Cushion Cut for Ring/Jewelry
Located in Peshawar, PK
GEMSTONE TYPE: Tourmaline PIECE(S): 1 WEIGHT: 2.10 Carats SHAPE: Cushion SIZE (MM): 6.52 x 7.68 x
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Rare Tricolor/Parti Natural Tourmaline Loose Gemstone, 4.85 Ct-Long Emerald Cut
Located in Peshawar, PK
Tourmaline Loose Gemstone sourced from the rich mines of Afghanistan. Revel in its exceptional 97% Eye Clean
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Rare Purplish Lavender Pink Natural Kunzite Loose Gemstone, 20.75 Ct-Asscher Cut
Located in Peshawar, PK
Gemstone Type: Kunzite Weight: 20.75 Carats Dimensions: 16.33 x 16.33 x 11.08 Color: Purple
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Kunzite

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

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

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

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Rare Green Baguette Cut Natural Tourmaline Loose Gemstone, 2.80 Ct-Top Quality
Located in Peshawar, PK
Gorgeous Yellowish Green Baguette Cut Natural Tourmaline Loose Gemstones from Afghanistan! This
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

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

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Rare Lagoon Green Natural Tourmaline Loose Gemstone, 7.65 Ct-Cushion Cut Afghani
Located in Peshawar, PK
Introducing our exquisite Lagoon Green Natural Tourmaline Loose Gemstone, a rare find of top-tier
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Rare Blue Green Cushion Cut Natural Tourmaline Loose Gemstone, 4.05 Ct-Afghani
Located in Peshawar, PK
Behold the rare beauty of our Rare Blue Green Cushion Cut Natural Tourmaline Loose Gemstone
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Rare Pink Bicolor Natural Tourmaline Loose Gemstone, 1.75 Ct-Emerald/Octagon Cut
Located in Peshawar, PK
Gemstone Type: Tourmaline Weight: 1.75 Carats Dimensions: 7.24 x 5.50 x 5.19 Color: Bicolor Clarity
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Rare Bluish Green Fancy Cushion Cut Natural Tourmaline Loose Gemstone, 5.50 Ct
Located in Peshawar, PK
Introducing our extraordinary 5.50-carat cushion-cut bluish-green natural Tourmaline from
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Rare Bluish Green Natural Tourmaline Loose Gemstone, 11.10 Ct-Step Cushion Afgh.
Located in Peshawar, PK
Indulge in luxury with this striking Step Cushion cut rare bluish-green Natural Tourmaline gemstone
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Rare Green Elongated Emerald Cut Natural Tourmaline Loose Gemstone, 5.15 Ct-Afg
Located in Peshawar, PK
Gemstone Type: Tourmaline Weight: 5.15 Carats Dimensions: 25.97 x 5.23 x 3.91 Color: Green Clarity
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Rare Bluish Green Natural Tourmaline Loose Gemstone, 6.50 Ct-Emerald Cut Afghani
Located in Peshawar, PK
Gemstone Type: Tourmaline Weight: 6.50 Carats Dimensions: 11.84 x 8.98 x 6.83 Color: Bluish Green
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

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1 Carat Loose Gemstones For Sale on 1stDibs

There is a broad range of 1 carat loose gemstones for sale on 1stDibs. All of the items for sale were constructed with extraordinary care, often using 18k Gold, Gold and Platinum. Find a collection of 10 vintage versions or 616 modern creations for a more contemporary example of these cherished accessories. 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. Contemporary and Modern are consistently popular styles when it comes to 1 carat loose gemstones. Versions of these items have been a part of the life’s work for many jewelers, but those produced by Merkaba, Sarosi By Timeless Gems and Tamir are consistently popular. Browse our collection of 147 Tourmaline versions today to add the perfect touch to your look. There are many oval cut, cushion cut and emerald cut 1 carat loose gemstones for sale. If you’re browsing the variety of 1 carat loose gemstones for sale, you’ll find that many are available today for women, but there are still pieces to choose from for men.

How Much are 1 Carat Loose Gemstones?

Prices for 1 carat loose gemstones start at $27 and top out at $260,000 with these rings, on average, selling for $6,199.

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.