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IGI certified color changed 2.09ct Blue Spinel (7.56x6.3x5.84mm)
IGI certified color changed 2.09ct Blue Spinel (7.56x6.3x5.84mm)

IGI certified color changed 2.09ct Blue Spinel (7.56x6.3x5.84mm)

Located in Singapore, SG

Kindly note that the stated price for this item is fixed and non-negotiable. We appreciate your understanding and respect for our pricing decision. Gemstone Details: Gem Type: Natu...

Category

21st Century and Contemporary Singaporean Art Deco Loose Gemstones

Materials

Spinel

GIA Certified Natural Rare Color  Blue Spinel 5.23 carat
GIA Certified Natural Rare Color  Blue Spinel 5.23 carat

GIA Certified Natural Rare Color Blue Spinel 5.23 carat

Located in Brooklyn, NY

This unheated Blue color spinel has exceptional brilliance and luster! this gem weighs 5.23 carats and measures 10.33 x 9.65 x 6.64 millimeters. It is a nicely cut Cushion shape an...

Category

2010s Sri Lankan Loose Gemstones

Materials

Spinel

GIA Certified Natural Color change Blue Spinel 2.46 carat
GIA Certified Natural Color change Blue Spinel 2.46 carat

GIA Certified Natural Color change Blue Spinel 2.46 carat

Located in Brooklyn, NY

This unheated Blue color change spinel has exceptional brilliance and luster! Accompanied by Gemological Institute of America Report #1236945980, this gem weighs 2.46 carats and mea...

Category

2010s Sri Lankan Loose Gemstones

Materials

Spinel

5.02ct Blue Spinel Pear Shape Gemstone, GIA Certified Unheated
5.02ct Blue Spinel Pear Shape Gemstone, GIA Certified Unheated

5.02ct Blue Spinel Pear Shape Gemstone, GIA Certified Unheated

By Sarosi By Timeless Gems

Located in Los Angeles, CA

This unheated blue spinel has exceptional brilliance and luster! Accompanied by Gemological Institute of America Report #6204170110, this gem weighs 5.02 carats and measures 10.44 x ...

Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Spinel

GFCO Certified Natural 2.45Ct Blue Spinel gemstone, Cushion, Tanzania
GFCO Certified Natural 2.45Ct Blue Spinel gemstone, Cushion, Tanzania

GFCO Certified Natural 2.45Ct Blue Spinel gemstone, Cushion, Tanzania

By GRALJEWELRY

Located in Dublin, D

Natural Spinel gemstone Laboratory certified GFCO Gemstone Color: Blue Gemstone Type: Spinel Gemstone size: 8.25x7.38x4.91mm Gemstone Shape: cushion Cut Gemstone Creation: Natural G...

Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

GFCO Certified Natural 2.09Ct. Blue Cobalt Spinel gemstone, Oval cut
GFCO Certified Natural 2.09Ct. Blue Cobalt Spinel gemstone, Oval cut

GFCO Certified Natural 2.09Ct. Blue Cobalt Spinel gemstone, Oval cut

By GRALJEWELRY

Located in Dublin, D

Natural Spinel Loose gemstone Laboratory certified GFCO Gemstone Color: Cobalt Blue Gemstone Type: Spinel Gemstone size: 8.96x6.58x4.72 mm Cut Grade: Excellent Clarity/Grade: Loupe ...

Category

2010s Sri Lankan Loose Gemstones

Materials

Spinel

Spinel Greenish-BLUE natural gemstone 2.09Ct, Pear cut, Tanzania, Certificate!
Spinel Greenish-BLUE natural gemstone 2.09Ct, Pear cut, Tanzania, Certificate!

Spinel Greenish-BLUE natural gemstone 2.09Ct, Pear cut, Tanzania, Certificate!

By GRALJEWELRY

Located in Dublin, D

Natural Greenish-BLUE Spinel gemstone from Tanzania GFCO Laboratory certified Gemstone Color: Greenish-Blue Gemstone Type: Spinel Gemstone size: 7.42x7.89x5.39 mm Cut Grade: Excelle...

Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

Natural Color change  Pear shape Blue Spinel 1.42 carat Blue to Violet  color
Natural Color change  Pear shape Blue Spinel 1.42 carat Blue to Violet  color

Natural Color change Pear shape Blue Spinel 1.42 carat Blue to Violet color

Located in Brooklyn, NY

This unheated Blue color change pear shape spinel has exceptional brilliance and luster! , this gem weighs 1.42 carats and measures 8.20 x 6.40 x 4.10 millimeters. It is a nicely ...

Category

2010s Sri Lankan Loose Gemstones

Materials

Spinel

Unheated 1.12ct Blue Color Change Spinel Cushion Gemstone, Sri Lanka
Unheated 1.12ct Blue Color Change Spinel Cushion Gemstone, Sri Lanka

Unheated 1.12ct Blue Color Change Spinel Cushion Gemstone, Sri Lanka

Located in Brooklyn, NY

This unheated Blue color change spinel has exceptional brilliance and luster !, this gem weighs 1.12 carat and measures 6.60 x 5.80 x 3.40 millimeters. It is a nicely cut Cushion s...

Category

2010s Sri Lankan Loose Gemstones

Materials

Spinel

GIA Certified Natural Rare Color change Blue Spinel 4.64 carat
GIA Certified Natural Rare Color change Blue Spinel 4.64 carat

GIA Certified Natural Rare Color change Blue Spinel 4.64 carat

Located in Brooklyn, NY

This unheated Blue color change spinel has exceptional brilliance and luster! Accompanied by Gemological Institute of America Report #1232945998, this gem weighs 4.64 carats and mea...

Category

2010s Sri Lankan Loose Gemstones

Materials

Spinel

Natural Color change Blue Spinel 3.18 carat Heart shape blue change to violet
Natural Color change Blue Spinel 3.18 carat Heart shape blue change to violet

Natural Color change Blue Spinel 3.18 carat Heart shape blue change to violet

Located in Brooklyn, NY

This unheated Blue color change Heart shape spinel has exceptional brilliance and luster! this gem weighs 3.18 carats and measures 8.30 x 8.70 x 6.50 millimeters. It is a nicely cut...

Category

2010s Sri Lankan Loose Gemstones

Materials

Spinel

GFCO Certified Natural 3.77 Ct. Blue Spinel gemstone, Cushion , Origin Tanzania
GFCO Certified Natural 3.77 Ct. Blue Spinel gemstone, Cushion , Origin Tanzania

GFCO Certified Natural 3.77 Ct. Blue Spinel gemstone, Cushion , Origin Tanzania

By GRALJEWELRY

Located in Dublin, D

Natural Spinel Loose gemstone Laboratory certified GFCO Gemstone Color: Blue Gemstone Type: Spinel Gemstone size: 9.45x8.03x5.95mm Cut Grade: Excellent Clarity/Grade: Eye clean Gems...

Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

Radiant Kiriko Cut Blue Spinel 0.73 Carats, Custom Precision Cut
Radiant Kiriko Cut Blue Spinel 0.73 Carats, Custom Precision Cut

Radiant Kiriko Cut Blue Spinel 0.73 Carats, Custom Precision Cut

Located in 足立区, JP

This 0.73-carat blue spinel features the original **Radiant Kiriko Cut**, a custom precision cut developed by KVL and inspired by the refined aesthetics of traditional Edo Kiriko cra...

Category

21st Century and Contemporary Japanese Contemporary Loose Gemstones

Materials

Spinel

Unheated 1.35ct Blue Color Change Spinel, Square Cut, Sri Lanka
Unheated 1.35ct Blue Color Change Spinel, Square Cut, Sri Lanka

Unheated 1.35ct Blue Color Change Spinel, Square Cut, Sri Lanka

Located in Brooklyn, NY

This unheated Blue color change spinel has exceptional brilliance and luster !, this gem weighs 1.35 carat and measures 6.80 x 6.80 x 3.60 millimeters. It is a nicely cut Square sh...

Category

2010s Sri Lankan Loose Gemstones

Materials

Spinel

Natural Unheated Blue Color Change Spinel Heart Shape Pair, 2.52ct
Natural Unheated Blue Color Change Spinel Heart Shape Pair, 2.52ct

Natural Unheated Blue Color Change Spinel Heart Shape Pair, 2.52ct

Located in Brooklyn, NY

This unheated Blue color change Heart shape spinel pair has exceptional brilliance and luster !, this gem weighs 2.52 carat and measures 7.40 x 6.40 x 4.00 millimeters. It is a nicel...

Category

2010s Sri Lankan Loose Gemstones

Materials

Spinel

GFCO Certified Natural 4.21 Ct., Blue Spinel gemstone, cushion cut, Tanzania
GFCO Certified Natural 4.21 Ct., Blue Spinel gemstone, cushion cut, Tanzania

GFCO Certified Natural 4.21 Ct., Blue Spinel gemstone, cushion cut, Tanzania

By GRALJEWELRY

Located in Dublin, D

Natural Spinel Loose gemstone Laboratory certified GFCO Gemstone Color: Blue Gemstone Type: Spinel Gemstone size: 10.72x7.60x6.00 mm Cut Grade: Excellent Clarity/Grade: Eye Clean Ge...

Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

Natural Color change Blue Spinel 1.45 carat unheated from Sri Lanka
Natural Color change Blue Spinel 1.45 carat unheated from Sri Lanka

Natural Color change Blue Spinel 1.45 carat unheated from Sri Lanka

Located in Brooklyn, NY

This unheated Blue color change spinel has exceptional brilliance and luster !, this gem weighs 1.45 carat and measures 7.50 x 6.00 x 4.00 millimeters. It is a nicely cut Cushion s...

Category

2010s Sri Lankan Loose Gemstones

Materials

Spinel

Natural Color change Blue Spinel 3.04 carat unheated from Sri Lanks
Natural Color change Blue Spinel 3.04 carat unheated from Sri Lanks

Natural Color change Blue Spinel 3.04 carat unheated from Sri Lanks

Located in Brooklyn, NY

This unheated Blue color change spinel has exceptional brilliance and luster !, this gem weighs 3.04 carats and measures 9.60 x 7.80 x 4.40 millimeters. It is a nicely cut Cushion s...

Category

2010s Sri Lankan Loose Gemstones

Materials

Spinel

Natural Color change Blue Spinel 2.62 carat unheated from Sri Lanka
Natural Color change Blue Spinel 2.62 carat unheated from Sri Lanka

Natural Color change Blue Spinel 2.62 carat unheated from Sri Lanka

Located in Brooklyn, NY

This unheated Blue color change spinel has exceptional brilliance and luster !, this gem weighs 2.62 carat and measures 8.87 x 7.46 x 4.76 millimeters. It is a nicely cut Cushion s...

Category

2010s Sri Lankan Loose Gemstones

Materials

Spinel

Natural Color change Blue Spinel 1.11 carat unheated from Sri Lanka
Natural Color change Blue Spinel 1.11 carat unheated from Sri Lanka

Natural Color change Blue Spinel 1.11 carat unheated from Sri Lanka

Located in Brooklyn, NY

This unheated Blue color change spinel has exceptional brilliance and luster !, this gem weighs 1.11 carat and measures 6.10 x 5.50 x 4.00 millimeters. It is a nicely cut Cushion s...

Category

2010s Sri Lankan Loose Gemstones

Materials

Spinel

Natural Color change Blue Spinel 2.88 carat unheated from Sri Lanka
Natural Color change Blue Spinel 2.88 carat unheated from Sri Lanka

Natural Color change Blue Spinel 2.88 carat unheated from Sri Lanka

Located in Brooklyn, NY

This unheated Blue color change spinel has exceptional brilliance and luster !, this gem weighs 2.88 carat and measures 9.20 x 7.70 x 5.00 millimeters. It is a nicely cut Cushion s...

Category

2010s Sri Lankan Loose Gemstones

Materials

Spinel

Natural Color change Blue Spinel 1.71 carat unheated from Sri Lan
Natural Color change Blue Spinel 1.71 carat unheated from Sri Lan

Natural Color change Blue Spinel 1.71 carat unheated from Sri Lan

Located in Brooklyn, NY

This unheated Blue color change spinel has exceptional brilliance and luster !, this gem weighs 1.71 carat and measures 7.50 x 5.60 x 5.00 millimeters. It is a nicely cut Cushion s...

Category

2010s Sri Lankan Loose Gemstones

Materials

Spinel

Spinel Cobalt VIVID Blue 2.99Ct natural gemstone, Oval cut, Tanzania Certificate
Spinel Cobalt VIVID Blue 2.99Ct natural gemstone, Oval cut, Tanzania Certificate

Spinel Cobalt VIVID Blue 2.99Ct natural gemstone, Oval cut, Tanzania Certificate

By GRALJEWELRY

Located in Dublin, D

Natural Cobalt Blue Spinel gemstone from Tanzania! GFCO Laboratory certified Gemstone Color: VIVID Blue Gemstone Type: Spinel Gemstone size: 9.02x7.71x5.91mm Cut Grade: Very Good Cl...

Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

Spinel VIVID Green-Blue natural gemstone, heart cut, Origin Tanzania, Certified
Spinel VIVID Green-Blue natural gemstone, heart cut, Origin Tanzania, Certified

Spinel VIVID Green-Blue natural gemstone, heart cut, Origin Tanzania, Certified

By GRALJEWELRY

Located in Dublin, D

Natural Green-Blue Spinel gemstone Laboratory certified GFCO Gemstone Color: Vivid Green-blue/Blue-green Gemstone Type: Spinel Gemstone size: 8.38x9.48x5.46 mm Cut Grade: Very Good ...

Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

Natural Sky Blue Spinel Pair, 1.45ct Oval Cut, Central Asia, Untreated
Natural Sky Blue Spinel Pair, 1.45ct Oval Cut, Central Asia, Untreated

Natural Sky Blue Spinel Pair, 1.45ct Oval Cut, Central Asia, Untreated

Located in Brooklyn, NY

This pretty open sky Blue spinel Oval cut , weighs 1.45 carats and would make a beautiful pair of Earrings , though its shape lends itself to a variety of possibilities! It measure...

Category

2010s Central Asian Loose Gemstones

Materials

Spinel

2.54 Carat AIGS Certified Blue Spinel Cushion Cut Natural Tanzanian Gemstone
2.54 Carat AIGS Certified Blue Spinel Cushion Cut Natural Tanzanian Gemstone

2.54 Carat AIGS Certified Blue Spinel Cushion Cut Natural Tanzanian Gemstone

Located in Bangkok, TH

Weight 2.54 carats Dimensions 8.76x7.04x4.73 mm Treatment none Origin Tanzania Clarity eye clean Cut Fancy Cushion Shape Cushion The 2.54 carat Blue Spinel Stone is an exquis...

Category

21st Century and Contemporary Tanzanian Modern Loose Gemstones

Materials

Spinel

Natural Color change Oval Blue Spinel 1.53 carat unheated from Sri Lanka
Natural Color change Oval Blue Spinel 1.53 carat unheated from Sri Lanka

Natural Color change Oval Blue Spinel 1.53 carat unheated from Sri Lanka

Located in Brooklyn, NY

This unheated Blue color change spinel has exceptional brilliance and luster !, this gem weighs 1.53 carat and measures 7.80 x 6.40 x 4.20 millimeters. It is a nicely cut Oval shap...

Category

2010s Sri Lankan Loose Gemstones

Materials

Spinel

GIL Certified 2.12 Carat Cobalt Blue Spinel from Burma No Heat
GIL Certified 2.12 Carat Cobalt Blue Spinel from Burma No Heat

GIL Certified 2.12 Carat Cobalt Blue Spinel from Burma No Heat

Located in Hua Hin, TH

GIL Certified 2.12 carat Cobalt Blue Spinel from Burma No Heat Dimension: 7.00 x 7.56 x 4.79 mm Weight: 2.12 carat Cut: Octagonal

Category

2010s Burmese Loose Gemstones

Materials

Spinel

AGL Certified Natural 2.82Ct Greyish-blue Spinel gemstone, Heart cut, Sri-Lanka
AGL Certified Natural 2.82Ct Greyish-blue Spinel gemstone, Heart cut, Sri-Lanka

AGL Certified Natural 2.82Ct Greyish-blue Spinel gemstone, Heart cut, Sri-Lanka

By GRALJEWELRY

Located in Dublin, D

Natural Spinel Loose gemstone Laboratory certified AGL Gemstone Color: Greyish-Blue Gemstone Type: Spinel Gemstone size: 9.21x7.79x5.51 mm Cut Grade: Excellent Clarity/Grade: Eye Cl...

Category

2010s Sri Lankan Loose Gemstones

Materials

Spinel

0.95 carats Grayish Blue Spinel Stone Emerald Cut Natural Burmese Gemstone
0.95 carats Grayish Blue Spinel Stone Emerald Cut Natural Burmese Gemstone

0.95 carats Grayish Blue Spinel Stone Emerald Cut Natural Burmese Gemstone

Located in Bangkok, TH

Weight 0.95 carats Dimensions 6.3x5.0x3.4 mm Treatment none Origin Burma Clarity SI Shape octagon Cut emerald This exquisite 0.95 carats Grayish Blue spinel gemstone hails fr...

Category

21st Century and Contemporary Burmese Modern Loose Gemstones

Materials

Spinel

2.13 Carats Blue Spinel Oval Faceted Natural Gemstone for Fine Jewelry Tanzania
2.13 Carats Blue Spinel Oval Faceted Natural Gemstone for Fine Jewelry Tanzania

2.13 Carats Blue Spinel Oval Faceted Natural Gemstone for Fine Jewelry Tanzania

Located in Jaipur, RJ

Tanzania Blue Spinel Oval Faceted Natural Cut Stone for Fine Jewelry Origin - Tanzania Weight - 2.13 Ct Size - 9x6x5 mm Shape - Oval Quantity - 1 Piece

Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

Natural Blue Vietnamese Cobalt Spinel Gemstone 0.54 carats with GIA Report
Natural Blue Vietnamese Cobalt Spinel Gemstone 0.54 carats with GIA Report

Natural Blue Vietnamese Cobalt Spinel Gemstone 0.54 carats with GIA Report

Located in Los Angeles, CA

Experience the enchanting allure of 4.67 carats Natural Blue Sapphire from Vietnam, confirmed by a GIA Report. Crafted in an oval shape, this gem measures 6.17 x 4.51 x 2.78 mm, rev...

Category

21st Century and Contemporary Vietnamese Modern Loose Gemstones

Materials

Spinel

10.47 Carat Grey & Blue Spinel Tanzania Faceted Fancy Cut stone Natural Gemstone
10.47 Carat Grey & Blue Spinel Tanzania Faceted Fancy Cut stone Natural Gemstone

10.47 Carat Grey & Blue Spinel Tanzania Faceted Fancy Cut stone Natural Gemstone

Located in Jaipur, RJ

10.47 Carat Grey & Blue Spinel Tanzania Fancy Faceted Cut stone Natural Gemstone Weight - 10.47 Carats Size - 6x7 To 11.5x6 mm Shape - Fancy Cut Quantity - 6 Piece

Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

35.12 Carat Blue Spinel Tanzania Faceted Pear Cut stone For Jewelry Natural Gem
35.12 Carat Blue Spinel Tanzania Faceted Pear Cut stone For Jewelry Natural Gem

35.12 Carat Blue Spinel Tanzania Faceted Pear Cut stone For Jewelry Natural Gem

Located in Jaipur, RJ

35.12 Carat Blue Spinel Tanzania Faceted Pear Cut stone For Jewelry Natural Gem Weight - 35.12 Carats Size - 6x5 To 7x11mm Shape - Pear Quantity - 28 Pieces

Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

24.86 Carat Blue Spinel Tanzania Oval Faceted Natural Cut stone Fine Jewelry Gem
24.86 Carat Blue Spinel Tanzania Oval Faceted Natural Cut stone Fine Jewelry Gem

24.86 Carat Blue Spinel Tanzania Oval Faceted Natural Cut stone Fine Jewelry Gem

Located in Jaipur, RJ

24.86 Carat Blue Spinel Tanzania Oval Faceted Natural Cut stone Fine Jewelry Gem Weight - 24.86 Carats Size - 4.5 To 8x6 mm Shape - Oval Quantity - 23 Piece

Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

37.14 Carat Blue Spinel Tanzania Oval Faceted Natural Cut stone Fine Jewelry Gem
37.14 Carat Blue Spinel Tanzania Oval Faceted Natural Cut stone Fine Jewelry Gem

37.14 Carat Blue Spinel Tanzania Oval Faceted Natural Cut stone Fine Jewelry Gem

Located in Jaipur, RJ

37.14 Carat Blue Spinel Tanzania Oval Faceted Natural Cut stone Fine Jewelry Gem Weight - 37.14 Carats Size - 7x5 To 8x7 mm Shape - Oval Quantity - 18 Piece

Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

24.30 Carat Blue Spinel Tanzania Oval Faceted Natural Cut stone Fine Jewelry Gem
24.30 Carat Blue Spinel Tanzania Oval Faceted Natural Cut stone Fine Jewelry Gem

24.30 Carat Blue Spinel Tanzania Oval Faceted Natural Cut stone Fine Jewelry Gem

Located in Jaipur, RJ

24.30 Carat Blue Spinel Tanzania Oval Faceted Natural Cut stone Fine Jewelry Gem Weight - 24.30 Carats Size - 5x7 To 6x8 mm Shape - Oval Quantity - 15 Piece

Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

34.50 Carat Blue Spinel Tanzania Oval Faceted Natural Cut stone Fine Jewelry Gem
34.50 Carat Blue Spinel Tanzania Oval Faceted Natural Cut stone Fine Jewelry Gem

34.50 Carat Blue Spinel Tanzania Oval Faceted Natural Cut stone Fine Jewelry Gem

Located in Jaipur, RJ

34.50 Carat Blue Spinel Tanzania Oval Faceted Natural Cut stone Fine Jewelry Gem Weight - 34.50 Carats Size - 7x6 To 9x7 mm Shape - Oval Quantity - 17 Pieces

Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

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Blue Spinel Loose For Sale on 1stDibs

Surely you’ll find the exact blue spinel loose you’re seeking on 1stDibs — we’ve got a vast assortment for sale. Each design created in this style — which was crafted with great care and often made from Titanium — can elevate any look. For this particular piece, 1.5 Carat and 2 Carat are consistently popular carat weights. Finding an appealing blue spinel loose — no matter the origin — is easy, but Gems and Jewels UK, Sarosi By Timeless Gems and Merkaba each produced a popular version that is worth a look. See these pages for an oval cut iteration of this accessory, while there are also cushion cut cut and pear cut cut versions available here, too. Finding a blue spinel loose for sale for men should be easy, but there are 10 pieces available to browse for unisex as well as women, too.

How Much is a Blue Spinel Loose?

The price for a blue spinel loose starts at $165 and tops out at $45,000 with these more-jewelry-watches, on average, selling for $238.

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.