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Rare Loose Gemstone

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Fine 1.40ct Australian Blue Sapphire Oval Cut Rare Loose Gemstone
Located in Birmingham, GB
Fine 1.40ct Australian Blue Sapphire Oval Cut Rare Loose Gemstone 7.5 x 5.7mm Fine Natural
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire

Fine Blue Ceylon Sapphire 0.85ct Oval Cut Rare Loose Gemstone VVS
By Gems and Jewels UK
Located in Birmingham, GB
Fine Blue Ceylon Sapphire 0.85ct Oval Cut Rare Loose Gemstone 6.5x4.7mm VVS Fine Light Blue Ceylon
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire

Fine Deep Green Colour Sapphire 1.26ct Heart Cut Rare Loose Gemstone 6.7x6.6mm
Located in Birmingham, GB
Fine Deep Green Colour Sapphire 1.26ct Heart Cut Rare Loose Gemstone 6.7x6.6mm Natural Green
Category

21st Century and Contemporary British Loose Gemstones

Materials

Sapphire

0.87ct Deep Blue Sapphire Square Cushion Cut IGI Certified Rare Loose Gemstone
By Gems and Jewels UK
Located in Birmingham, GB
0.87ct Deep Blue Sapphire Square Cushion Cut IGI Certified Rare Loose Gemstone Natural Deep Blue
Category

20th Century Loose Gemstones

Materials

Blue Sapphire

Natural 0.66ct Deep Blue Sapphire Oval Cut Rare Loose Gemstone VVS
By Gems and Jewels UK
Located in Birmingham, GB
Natural 0.66ct Deep Blue Sapphire Oval Cut Rare 6x4.6mm Loose Gemstone VVS Natural Deep Blue
Category

21st Century and Contemporary Loose Gemstones

Materials

Blue Sapphire

1.82ct AIG Certified Vivid Blue Sapphire Oval Cut Rare Loose Gemstone
Located in Birmingham, GB
1.82ct AIG Certified Vivid Blue Sapphire Oval Cut Rare 7x6mm Loose Gemstone AIG Certified Vivid
Category

21st Century and Contemporary British Loose Gemstones

Materials

Blue Sapphire

FINE Deep Blue Sapphire 1.02ct Pear Teardrop Cut RARE Loose Gemstone 7x6mm
By Gems and Jewels UK
Located in Birmingham, GB
FINE Deep Blue Sapphire Gemstone. 1.02 Carat with a beautiful deep blue colour and excellent
Category

21st Century and Contemporary Loose Gemstones

Materials

Blue Sapphire

Fine Blue Spinel 1.20ct Oval Cut Rare Gemstone Loose Rare Gem
Located in Birmingham, GB
Fine Blue Spinel 1.20ct Oval Cut Rare Gemstone 7 x 5.8mm Loose Rare Gem Fine Natural Blue Spinel
Category

21st Century and Contemporary Loose Gemstones

Materials

Spinel

Fine Blue Spinel 1.08ct Oval Cut Rare Gemstone Loose Rare Gem
Located in Birmingham, GB
Fine Blue Spinel 1.08ct Oval Cut Rare Gemstone 6.5 x 5.3mm Loose Rare Gem Fine Natural Blue Spinel
Category

21st Century and Contemporary Loose Gemstones

Materials

Spinel

Fine Blue Spinel 1.54ct Oval Cut Rare Gemstone Loose Rare Gem
By Gems and Jewels UK
Located in Birmingham, GB
Fine Natural Blue Spinel Gemstone. Rare spinel with a fine vivid blue colour and excellent clarity
Category

21st Century and Contemporary Loose Gemstones

Materials

Spinel

1.05ct Fine Blue Spinel Marquise Cut Rare Gemstone 9.6x4.4mm Loose Rare Gem
By Gems and Jewels UK
Located in Birmingham, GB
1.05ct Fine Blue Spinel Marquise Cut Rare Gemstone 9.6x4.4mm Loose Rare Gem Fine Natural Vivid
Category

20th Century Loose Gemstones

Materials

Spinel

Rare Cat Eye Aquamarine Sugarloaf Cabochon Loose Gemstone for Jewelry
Located in Jaipur, RJ
Fine needles inclusion in the stone oriented in a way to showcase a cats eye phenomenon when a 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 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

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

2010s Tanzanian Loose Gemstones

Materials

Tanzanite

Rare Horsetail 0.85 Ct Russian Demantoid Loose Gemstone ICL Certified
By Tsarina Jewels
Located in Bangkok, TH
The first known Demantoids were discovered in the Ural Mountain of Russia. The Demantoid Garnet became famous around the world because of its highly-refractive index which is greate...
Category

2010s Russian Russian Empire Loose Gemstones

Materials

Garnet

Fine Violet Purple Spinel 1.47ct Oval Cut Rare Gemstone Loose Gem
Located in Birmingham, GB
Fine Violet Purple Spinel 1.47ct Oval Cut Rare Gemstone 7.3x6.4mm Loose Gem Fine Natural Purple
Category

21st Century and Contemporary Loose Gemstones

Materials

Spinel

Fine 0.88ct Blue Vivid Sapphire Pear Cut Rare Loose Cut Gemstone
By Gems and Jewels UK
Located in Birmingham, GB
Fine 0.88ct Blue Vivid Sapphire Pear Cut Rare Loose Cut Gemstone 6.5x5.3mm Fine Natural Vivid Blue
Category

20th Century Loose Gemstones

Materials

Sapphire, Blue Sapphire

1.26ct Deep Blue Sapphire Oval Cut Rare 7.6x5.8mm Loose Gemstone VS
By Gems and Jewels UK
Located in Birmingham, GB
1.26ct Deep Blue Sapphire Oval Cut Rare 7.6x5.8mm Loose Gemstone VS Natural Oval Cut Deep Blue
Category

20th Century Loose Gemstones

Materials

Blue Sapphire

Rare Watermelon Bicolor Natural Tourmaline Loose Gemstones 7.25 Ct for Earrings
Located in Peshawar, PK
rare watermelon bicolor Tourmaline gemstones, boasting mesmerizing hues of bluish green and purplish
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
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H 0.47 in W 0.27 in D 0.21 in Dm 0.26 in L 0.5 in
1.09ct AIG Certified Deep Rare Blue Sapphire Oval Cut Loose Gemstone
By Gems and Jewels UK
Located in Birmingham, GB
1.09ct AIG Certified Deep Rare Blue Sapphire Oval Cut 6.6x5mm Loose Gemstone AIG Certified Deep
Category

20th Century Loose Gemstones

Materials

Blue Sapphire

Fine 3.08ct Deep Blue Natural Sapphire Heart Cut Loose Rare Gemstone
Located in Birmingham, GB
Fine 3.08ct Deep Blue Natural Sapphire Heart Cut Loose Rare Gemstone 9.2x8mm Natural Deep Blue
Category

21st Century and Contemporary British Loose Gemstones

Materials

Blue Sapphire, Sapphire

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 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

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

.94 Carat Rare Green Demantoid Garnet, Loose Gemstone, GIA Certified ....A
By Sarosi By Timeless Gems
Located in Los Angeles, CA
Demantoid garnets are among the rarest gemstones in the world. This vivid, bright green round
Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Garnet

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

Natural Aquamarine Carved Leaf Loose Gemstone Rare Size and Hand Carving
Located in Jaipur, RJ
Weight: 120.55 Carats Size: 50x22 MM Pieces: 2
Category

21st Century and Contemporary Mozambican Art Deco Loose Gemstones

Materials

Aquamarine

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
enchantment of our rare Pink Bicolor emerald/Octagon cut natural Tourmaline Loose Gemstone. Revel in its
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 Purplish Lavender Pink Natural Kunzite Loose Gemstone, 20.75 Ct-Asscher Cut
Located in Peshawar, PK
Kunzite Loose Gemstone. Radiating with an unbeatable luster that captures the essence of refined
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Kunzite

Rare Green Natural Tourmaline Loose Gemstone 2.10Ct Cushion Cut for Ring/Jewelry
Located in Peshawar, PK
demand Quite beautiful 2.10 Carats natural green Tourmaline loose gemstone, straight from the legendary
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

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

Fine Blue Ceylon Sapphire 0.60ct Oval Cut Rare Loose Cut Gemstone VS
By Gems and Jewels UK
Located in Birmingham, GB
Fine Blue Ceylon Sapphire 0.60ct Oval Cut Rare Loose Cut Gemstone 5.4x4.5mm VS Fine Blue Ceylon
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire

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

Rare Green Natural Tourmaline Loose Gemstone, 7.75 Ct-Emerald Cut Top Quality
Located in Peshawar, PK
Elevate your jewelry creations with our stunning 7.75-Carats natural Tourmaline loose gemstone
Category

21st Century and Contemporary Afghan 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 Yellow Natural Sphene Loose Gemstone, 1.05 Ct Round Brilliant for Ring
Located in Peshawar, PK
This yellow 1.05 carat round brilliant cut natural sphene is a rare and beautiful gemstone. Sphene
Category

21st Century and Contemporary Central African Contemporary Loose Gemstones

Materials

Other

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

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 Vivid Seafoam Natural Tourmaline Loose Gemstone, 5.55 Carat-Cushion Cut Afg
Located in Peshawar, PK
Extraordinary Step Cushion Cut Vivid Seafoam Natural Tourmaline. Mined in Afghanistan, this rare
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 Orange Certified Citrine Loose Gemstone 15.30 Ct Fancy Cut for Pendant
Located in Peshawar, PK
gemstone with a timeless elegance. This 15.35 carat fancy-cut Citrine is a rare and unique treasure. It's
Category

21st Century and Contemporary Brazilian Contemporary Loose Gemstones

Materials

Citrine

Rare Bluish Green Natural Tourmaline Loose Gemstone, 6.50 Ct-Emerald Cut Afghani
Located in Peshawar, PK
our exquisite Bluish Green Natural Tourmaline – a rare gemstone of unparalleled beauty. Mined from the
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Rare Mint Green Natural Tourmaline Loose Gemstone, 2.70 Ct Round Brilliant Cut
Located in Peshawar, PK
round brilliant mint green tourmaline gemstone is a rare and valuable find. The gemstone has been mined
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Rare Pink Natural Tourmaline Loose Gemstones, 3.80 Ct Octagon Emerald Cut Afghan
Located in Peshawar, PK
GEMSTONE TYPE: Tourmaline PIECE(S): 2 WEIGHT: 3.80 Carat SHAPE: Octagon Emerald Cut SIZE (MM
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Rare Golden Peach Natural Imperial Topaz Loose Gemstones, 5.90 Ct Emerald Cut
Located in Peshawar, PK
Gemstone Type: Imperial Topaz Weight: 5.90 Carats Dimensions: 3.85 Ct: 9.23 x 7.89 x 6.10 2.05 Ct
Category

21st Century and Contemporary Pakistani Contemporary Loose Gemstones

Materials

Topaz, Imperial Topaz

Rare Golden Peach Natural Imperial Topaz Loose Gemstones, 5.90 Ct Emerald Cut
Rare Golden Peach Natural Imperial Topaz Loose Gemstones, 5.90 Ct Emerald Cut
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H 0.29 in W 0.32 in D 0.25 in Dm 0.26 in L 0.37 in
Rare Bluish Green Fancy Cushion Cut Natural Tourmaline Loose Gemstone, 5.50 Ct
Located in Peshawar, PK
Afghanistan. This gemstone boasts impressive clarity, enhanced by excellent luster, making it a dazzling
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Natural Aquamarine Carved Leaf Pair Loose Gemstone Rare Size and Hand Carving
Located in Jaipur, RJ
Weight: 200.70 Carats Size: 38x31 MM Pieces: 2
Category

21st Century and Contemporary Mozambican Art Deco Loose Gemstones

Materials

Aquamarine

Rare Pink Natural Tourmaline Loose Gemstone, 2.65 Carat Cushion Cut for Ring Afg
Located in Peshawar, PK
exquisite Rare Pink Afghan Tourmaline – a captivating loose gemstone meticulously cut and polished into a
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Rare Lagoon Mint Green Tourmaline Loose Gemstone, 5.05 Ct Cushion Cut for Ring
Located in Peshawar, PK
CERTIFICATE: On demand Gorgeous 5.05 Carats Lagoon Mint Green Natural Tourmaline Loose Gemstone, sourced
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Rare Mint Green Natural Tourmaline Loose Gemstone, 5.80 Ct Cushion Cut for Ring
Located in Peshawar, PK
Captivating Mint Green Tourmaline Loose Gemstone - Ethically Sourced from Afghanistan Gemstone
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Pink Bicolor Rare Natural Tourmaline Loose Gemstones Lot, 3.70 Ct Emerald Cut Af
Located in Peshawar, PK
Natural Tourmaline Loose Gemstones Lot, sourced directly from Afghanistan. Each gemstone boasts a unique
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Pink Bicolor Rare Natural Tourmaline Loose Gemstones Lot, 3.70 Ct Emerald Cut Af
Pink Bicolor Rare Natural Tourmaline Loose Gemstones Lot, 3.70 Ct Emerald Cut Af
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H 0.28 in W 0.18 in D 0.12 in Dm 0.26 in L 0.29 in
1.35ct Deep Blue Sapphire Rare Oval Cut IGI Certified Loose Gemstone in Blister
By Gems and Jewels UK
Located in Birmingham, GB
1.35ct Deep Blue Sapphire Rare Oval Cut IGI Certified Loose Gemstone in Blister Natural Deep Blue
Category

20th Century Loose Gemstones

Materials

Blue Sapphire

Rare Deep Yellow Natural Sphene Loose Gemstone, 0.75 Ct Round Brilliant for Ring
Located in Peshawar, PK
yellow 1.05 carat round brilliant cut natural sphene is a rare and beautiful gemstone. Sphene, also known
Category

21st Century and Contemporary Central African Contemporary Loose Gemstones

Materials

Other

Rare Pink Natural Afghan Tourmaline Loose Gemstone, 2.75 Ct-Cushion Cut for ring
Located in Peshawar, PK
Presenting our top-class Rare Pink Cushion Cut Natural Tourmaline, a dazzling gemstone weighing
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Rare Pink Natural Tourmaline Loose Gemstone, 2.30 Ct Cushion Cut Ideal for Ring
Located in Peshawar, PK
tourmalines of this quality and size are becoming increasingly rare, making this gemstone a valuable
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

Rare Green Natural Peridot Loose Gemstone, 2.30 Ct Cushion Cut Ideal for Ring
Located in Peshawar, PK
GEMSTONE TYPE: Peridot PIECE(S): 1 WEIGHT: 2.30 Carats SHAPE: Cushion SIZE (MM): 8.30 x 6.80 x
Category

21st Century and Contemporary Pakistani Contemporary Loose Gemstones

Materials

Peridot

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Rare Loose Gemstone For Sale on 1stDibs

You are likely to find exactly the rare loose gemstone you’re looking for on 1stDibs, as there is a broad range for sale. Each design created in this style — which was crafted with great care and often made from gold, 18k gold and white gold — can elevate any look. Our collection of these items for sale includes 59 vintage editions and 644 modern creations to choose from as well. If you’re looking for a rare loose gemstone from a specific time period, our collection is diverse and broad-ranging, and you’ll find at least one that dates back to the 18th Century while another version may have been produced as recently as the 21st Century. Creating a rare loose gemstone has been a part of the legacy of many jewelers, but those produced by Gems and Jewels UK, Sarosi By Timeless Gems and Merkaba are consistently popular. A rare loose gemstone of any era or style can lend versatility to your look, but a version featuring sapphire, from our inventory of 274, is particularly popular. Today, if you’re looking for an oval cut version of this piece and are unable to find the perfect match, our selection also includes cushion cut and brilliant cut alternatives. Most of our rare loose gemstone for sale are for women, but there are 627 pieces available to browse for men.

How Much is a Rare Loose Gemstone?

On average, a rare loose gemstone at 1stDibs sells for $1,578, while they’re typically $26 on the low end and $7,120,000 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.