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Certified 1.12 Carat Natural Loose Purple Spinel Gemstone From Tanzania
Certified 1.12 Carat Natural Loose Purple Spinel Gemstone From Tanzania

Certified 1.12 Carat Natural Loose Purple Spinel Gemstone From Tanzania

Located in Peshawar, PK

: Tanzania Treatment: Non Certificate: On Customer Demand Shape: Cushion Spinels is a captivating gemstone

Category

21st Century and Contemporary Tanzanian Arts and Crafts Loose Gemstones

Materials

Spinel, Other

Certified 1.05 Carat Natural Loose Blue Spinel Gemstone From Tanzania
Certified 1.05 Carat Natural Loose Blue Spinel Gemstone From Tanzania

Certified 1.05 Carat Natural Loose Blue Spinel Gemstone From Tanzania

Located in Peshawar, PK

Treatment: Non Certificate: On Customer Demand Shape: Cushion Spinels is a captivating gemstone prized for

Category

21st Century and Contemporary Tanzanian Arts and Crafts Loose Gemstones

Materials

Spinel, Other

Certified 1.29 Carat Natural Loose Red Spinel Cushion Cut Gemstone
Certified 1.29 Carat Natural Loose Red Spinel Cushion Cut Gemstone

Certified 1.29 Carat Natural Loose Red Spinel Cushion Cut Gemstone

Located in Peshawar, PK

gemstone prized for its brilliant colors and exceptional clarity. Found in a spectrum of hues, including

Category

21st Century and Contemporary Tanzanian Arts and Crafts Loose Gemstones

Materials

Spinel, Other

GFCO Certified 1.44 Carats Natural Loose Burmese Red Spinel Gemstone
GFCO Certified 1.44 Carats Natural Loose Burmese Red Spinel Gemstone

GFCO Certified 1.44 Carats Natural Loose Burmese Red Spinel Gemstone

Located in Peshawar, PK

(Burma) Treatment: None Certificate: GFCO Certificate Available Spinel is a captivating gemstone prized

Category

21st Century and Contemporary Burmese Arts and Crafts Loose Gemstones

Materials

Spinel, Other

Certified 2.10 Carat Natural Loose Lavender Spinel Cushion Cut Gemstone
Certified 2.10 Carat Natural Loose Lavender Spinel Cushion Cut Gemstone

Certified 2.10 Carat Natural Loose Lavender Spinel Cushion Cut Gemstone

Located in Peshawar, PK

: Tanzania Treatment: None Certificate: AIG Certificate Available Spinel is a captivating gemstone prized

Category

21st Century and Contemporary Tanzanian Arts and Crafts Loose Gemstones

Materials

Spinel, Other

Certified 1.29 Carat Natural Loose Red Spinel Cushion Cut Gemstone
Certified 1.29 Carat Natural Loose Red Spinel Cushion Cut Gemstone

Certified 1.29 Carat Natural Loose Red Spinel Cushion Cut Gemstone

Located in Peshawar, PK

Treatment: None Certificate: AIG Certificate Available Spinel is a captivating gemstone prized for its

Category

21st Century and Contemporary Tanzanian Arts and Crafts Loose Gemstones

Materials

Spinel, Other

AIG Certified 2.16 Carat Natural Loose Spinel Cushion Shape Gemstone
AIG Certified 2.16 Carat Natural Loose Spinel Cushion Shape Gemstone

AIG Certified 2.16 Carat Natural Loose Spinel Cushion Shape Gemstone

Located in Peshawar, PK

captivating gemstone prized for its brilliant colors and exceptional clarity. Found in a spectrum of hues

Category

21st Century and Contemporary Tanzanian Arts and Crafts Loose Gemstones

Materials

Spinel

GFCO Certified Natural 1.78Ct Grey Spinel gemstone, Heart cut, Tanzania
GFCO Certified Natural 1.78Ct Grey Spinel gemstone, Heart cut, Tanzania

GFCO Certified Natural 1.78Ct Grey Spinel gemstone, Heart cut, Tanzania

By GRALJEWELRY

Located in Dublin, D

Natural Spinel gemstone Laboratory certified GFCO Gemstone Color: Grey Gemstone Type: Spinel

Category

21st Century and Contemporary Tanzanian Loose Gemstones

Materials

Spinel

Certified 1.64 Carat Natural Loose Blue Sapphire Marquise Cut Gemstone
Certified 1.64 Carat Natural Loose Blue Sapphire Marquise Cut Gemstone

Certified 1.64 Carat Natural Loose Blue Sapphire Marquise Cut Gemstone

Located in Peshawar, PK

gemstone of legendary beauty and enduring allure, captivates with its rich history, stunning color

Category

21st Century and Contemporary Malagasy Arts and Crafts Loose Gemstones

Materials

Blue Sapphire, Other

Certified 1.02 Carat Natural Loose Ruby Gemstone From Myanmar (Burma)
Certified 1.02 Carat Natural Loose Ruby Gemstone From Myanmar (Burma)

Certified 1.02 Carat Natural Loose Ruby Gemstone From Myanmar (Burma)

Located in Peshawar, PK

and unparalleled quality, making them some of the most coveted gemstones in the world Burma ruby

Category

21st Century and Contemporary Burmese Arts and Crafts Loose Gemstones

Materials

Ruby, Other

GFCO Certified 1.51 Carat Natural Loose Sapphire Oval Shape Gemstone
GFCO Certified 1.51 Carat Natural Loose Sapphire Oval Shape Gemstone

GFCO Certified 1.51 Carat Natural Loose Sapphire Oval Shape Gemstone

Located in Peshawar, PK

Sapphire, a gemstone of legendary beauty and enduring allure, captivates with its rich history, stunning

Category

21st Century and Contemporary Burmese Arts and Crafts Loose Gemstones

Materials

Sapphire, Other

Certified 2.14 Carat Natural Loose Sapphire Gemstone From Madagascar, Africa
Certified 2.14 Carat Natural Loose Sapphire Gemstone From Madagascar, Africa

Certified 2.14 Carat Natural Loose Sapphire Gemstone From Madagascar, Africa

Located in Peshawar, PK

Sapphire, a gemstone of legendary beauty and enduring allure, captivates with its rich history, stunning

Category

21st Century and Contemporary Malagasy Arts and Crafts Loose Gemstones

Materials

Sapphire, Other

Certified 4.41 Carat Natural Loose Tsavorite Garnet Cushion Cut Gemstone
Certified 4.41 Carat Natural Loose Tsavorite Garnet Cushion Cut Gemstone

Certified 4.41 Carat Natural Loose Tsavorite Garnet Cushion Cut Gemstone

Located in Peshawar, PK

green gemstone known for its vivid brilliance and exceptional clarity. A member of the grossular garnet

Category

21st Century and Contemporary Tanzanian Arts and Crafts Loose Gemstones

Materials

Garnet, Tsavorite, Other

GFCO Certified 0.69 Carat Natural Loose Ruby Gemstone From Mozambique
GFCO Certified 0.69 Carat Natural Loose Ruby Gemstone From Mozambique

GFCO Certified 0.69 Carat Natural Loose Ruby Gemstone From Mozambique

Located in Peshawar, PK

most sought-after gemstones in today’s market because they combine intense red color, strong clarity

Category

21st Century and Contemporary Mozambican Arts and Crafts Loose Gemstones

Materials

Ruby, Other

Untreated Certified 1.68 Carat Natural Loose Sapphire Oval Shape Gemstone
Untreated Certified 1.68 Carat Natural Loose Sapphire Oval Shape Gemstone

Untreated Certified 1.68 Carat Natural Loose Sapphire Oval Shape Gemstone

Located in Peshawar, PK

gemstone of legendary beauty and enduring allure, captivates with its rich history, stunning color

Category

21st Century and Contemporary Malagasy Arts and Crafts Loose Gemstones

Materials

Sapphire, Other

GCI Certified 1.36 Carat Natural Ruby Octagon Shape Loose Gemstone
GCI Certified 1.36 Carat Natural Ruby Octagon Shape Loose Gemstone

GCI Certified 1.36 Carat Natural Ruby Octagon Shape Loose Gemstone

Located in Peshawar, PK

: Natural Certificate: GCI Lab Certificate Available Shape : Octagon A loose ruby gemstone is an

Category

21st Century and Contemporary Malagasy Arts and Crafts Loose Gemstones

Materials

Ruby

Unheated Certified 3.19 Carat Natural Loose Tri Colour Sapphire Gemstone
Unheated Certified 3.19 Carat Natural Loose Tri Colour Sapphire Gemstone

Unheated Certified 3.19 Carat Natural Loose Tri Colour Sapphire Gemstone

Located in Peshawar, PK

Sapphire, a gemstone of legendary beauty and enduring allure, captivates with its rich history, stunning

Category

21st Century and Contemporary Malagasy Arts and Crafts Loose Gemstones

Materials

Sapphire, Other

Certified Velvet Pink 3.17 Carat Natural Loose Mahenge Spinel Gemstone
Certified Velvet Pink 3.17 Carat Natural Loose Mahenge Spinel Gemstone

Certified Velvet Pink 3.17 Carat Natural Loose Mahenge Spinel Gemstone

Located in Peshawar, PK

palette, Mahenge Spinel is considered one of the finest varieties of this gemstone. Mahenge Spinel is the

Category

21st Century and Contemporary Tanzanian Arts and Crafts Loose Gemstones

Materials

Spinel, Other

Unheated Certified 3.29 Carat Natural Loose Sapphire Gemstone From Madagascar
Unheated Certified 3.29 Carat Natural Loose Sapphire Gemstone From Madagascar

Unheated Certified 3.29 Carat Natural Loose Sapphire Gemstone From Madagascar

Located in Peshawar, PK

: Oval Colour: Bluish Green Treatment: Non Certificate: AIG Certificate Available Sapphire, a gemstone

Category

21st Century and Contemporary Malagasy Arts and Crafts Loose Gemstones

Materials

Sapphire, Other

Certified Vibrant Pink 1.62 Carat Natural Loose Mahenge Spinel Gemstone
Certified Vibrant Pink 1.62 Carat Natural Loose Mahenge Spinel Gemstone

Certified Vibrant Pink 1.62 Carat Natural Loose Mahenge Spinel Gemstone

Located in Peshawar, PK

color palette, Mahenge Spinel is considered one of the finest varieties of this gemstone. Mahenge

Category

21st Century and Contemporary Tanzanian Arts and Crafts Loose Gemstones

Materials

Spinel

Unheated Certified 2.15 Carat Natural Loose Sapphire Gemstone From Madagascar
Unheated Certified 2.15 Carat Natural Loose Sapphire Gemstone From Madagascar

Unheated Certified 2.15 Carat Natural Loose Sapphire Gemstone From Madagascar

Located in Peshawar, PK

: Oval Colour: Parti Colour Treatment: Non Certificate: AIG Certificate Available Sapphire, a gemstone

Category

21st Century and Contemporary Malagasy Arts and Crafts Loose Gemstones

Materials

Sapphire, Other

AIG Certified 2.73 Carat Natural Loose Sapphire Oval Shape Gemstone
AIG Certified 2.73 Carat Natural Loose Sapphire Oval Shape Gemstone

AIG Certified 2.73 Carat Natural Loose Sapphire Oval Shape Gemstone

Located in Peshawar, PK

: Oval Colour: Greenish Blue Treatment: Non Certificate: AIG Certificate Available Sapphire, a gemstone

Category

21st Century and Contemporary Malagasy Arts and Crafts Loose Gemstones

Materials

Sapphire, Other

GIA Certified "Royal Blue" Sapphire 6.09 Ct Cushion Loose Gemstone
GIA Certified "Royal Blue" Sapphire 6.09 Ct Cushion Loose Gemstone

GIA Certified "Royal Blue" Sapphire 6.09 Ct Cushion Loose Gemstone

Located in Fort Lee, NJ

quality sapphires. Certified by GIA, this stone displays the highly sought-after Royal Blue hue — a deep

Category

2010s Malagasy Loose Gemstones

Materials

Blue Sapphire

GIA Certified Deep Blue Sapphire 4.01 Ct Cushion Loose Gemstone
GIA Certified Deep Blue Sapphire 4.01 Ct Cushion Loose Gemstone

GIA Certified Deep Blue Sapphire 4.01 Ct Cushion Loose Gemstone

Located in Fort Lee, NJ

certified by GIA and is confirmed to be heat-treated only, with no indications of further enhancements

Category

2010s Sri Lankan Loose Gemstones

Materials

Blue Sapphire

GFCO Certified 7.19 Carat Natural Rhodolite Garnet Loose Tanzanian’s Gemstone
GFCO Certified 7.19 Carat Natural Rhodolite Garnet Loose Tanzanian’s Gemstone

GFCO Certified 7.19 Carat Natural Rhodolite Garnet Loose Tanzanian’s Gemstone

Located in Peshawar, PK

gemstone celebrated for its enchanting reddish-purple hues, occupies a special place in the realm of

Category

21st Century and Contemporary Tanzanian Arts and Crafts Loose Gemstones

Materials

Garnet, Rhodolite

Certified 0.75 Carat Natural Loose Pink Sapphire Step Cut Gemstone
Certified 0.75 Carat Natural Loose Pink Sapphire Step Cut Gemstone

Certified 0.75 Carat Natural Loose Pink Sapphire Step Cut Gemstone

Located in Peshawar, PK

a timeless gemstone prized for its delicate blush tones and exceptional brilliance. Belonging to the

Category

21st Century and Contemporary Sri Lankan Arts and Crafts Loose Gemstones

Materials

Pink Sapphire

9.42 Carat Chrysoberyl Cushion Cut Loose Gemstone GIA Certified Unheated
9.42 Carat Chrysoberyl Cushion Cut Loose Gemstone GIA Certified Unheated

9.42 Carat Chrysoberyl Cushion Cut Loose Gemstone GIA Certified Unheated

By Merkaba

Located in Beverly Hills, CA

Merkaba Jewelry Beverly Hills, the gemstone displays exceptional brilliance, strong presence, and

Category

21st Century and Contemporary Malagasy Modern Loose Gemstones

Materials

Chrysoberyl, 18k Gold, Rose Gold, White Gold, Yellow Gold, Platinum

GIA Certified 67.75 Carat Natural Quartz Citrine Oval Loose Gemstone
GIA Certified 67.75 Carat Natural Quartz Citrine Oval Loose Gemstone

GIA Certified 67.75 Carat Natural Quartz Citrine Oval Loose Gemstone

Located in Trumbull, CT

This GIA certified 67.75 Carat Natural Quartz Citrine Oval loose gemstone has modified brilliant

Category

21st Century and Contemporary South American Loose Gemstones

Materials

Citrine, Quartz

Certified 3.85 Carat Natural Loose Imperial Topaz Cushion Cut Gemstone
Certified 3.85 Carat Natural Loose Imperial Topaz Cushion Cut Gemstone

Certified 3.85 Carat Natural Loose Imperial Topaz Cushion Cut Gemstone

Located in Peshawar, PK

Faceted Imperial Topaz Weight: 3.85 Carats Dimension: 9.18 x 8.94 x 5.80 Mm Origin: Shamozai Mine Katlang, Pakistan Shape: Cushion Color; Orangy Pink Treatment: Non Certificate: C...

Category

21st Century and Contemporary Pakistani Arts and Crafts Loose Gemstones

Materials

Imperial Topaz, Other

Certified 15.82 Carat Natural Loose Imperial Topaz Emerald Shape Gemstone
Certified 15.82 Carat Natural Loose Imperial Topaz Emerald Shape Gemstone

Certified 15.82 Carat Natural Loose Imperial Topaz Emerald Shape Gemstone

Located in Peshawar, PK

Faceted Imperial Topaz Weight: 15.82 Carats Dimension: 21.11 x 10.66 x 7.11 Mm Origin: Shamozai Mine Katlang, Pakistan Shape: Emerald Color; Imperial Golden Treatment: Non Certifica...

Category

21st Century and Contemporary Pakistani Arts and Crafts Loose Gemstones

Materials

Imperial Topaz, Other

GIA Certified 10Ct Vivid Blue Sapphire Cushion Cut 13.8x9.2mm: Loose Gemstone
GIA Certified 10Ct Vivid Blue Sapphire Cushion Cut 13.8x9.2mm: Loose Gemstone

GIA Certified 10Ct Vivid Blue Sapphire Cushion Cut 13.8x9.2mm: Loose Gemstone

Located in Columbus, OH

GIA-certified 10 Ct vivid blue sapphire in a cushion cut, measuring 13.85 × 9.25 x 7.64 mm. A

Category

21st Century and Contemporary Modern Loose Gemstones

Materials

Sapphire

GIA Certified 25.04 Carat Natural Chrysoberyl Cat's Eye Loose Gemstone
GIA Certified 25.04 Carat Natural Chrysoberyl Cat's Eye Loose Gemstone

GIA Certified 25.04 Carat Natural Chrysoberyl Cat's Eye Loose Gemstone

Located in Stamford, CT

25.04ct GIA certified Chrysoberyl Cat's Eye. Well polished, with a strong eye. It's no common for a

Category

21st Century and Contemporary Loose Gemstones

Materials

Chrysoberyl

Certified Reddish Pink Natural Rhodolite Garnet Cushion Cut 4.69 Carat Gemstone
Certified Reddish Pink Natural Rhodolite Garnet Cushion Cut 4.69 Carat Gemstone

Certified Reddish Pink Natural Rhodolite Garnet Cushion Cut 4.69 Carat Gemstone

Located in Peshawar, PK

Certified Reddish Pink Natural Rhodolite Garnet Cushion Cut Loose Gemstone – Almandine Pyrope

Category

21st Century and Contemporary Tanzanian Contemporary Loose Gemstones

Materials

Garnet, Rhodolite

Certified 2.06 Carat Pastel Pink Natural Sapphire Pear Cut Loose Gemstone
Certified 2.06 Carat Pastel Pink Natural Sapphire Pear Cut Loose Gemstone

Certified 2.06 Carat Pastel Pink Natural Sapphire Pear Cut Loose Gemstone

Located in Peshawar, PK

Certified Pastel Pink Natural Sapphire Pear Cut Loose Gemstone – Unheated, Top Quality, Jewelry

Category

2010s Malagasy Contemporary Loose Gemstones

Materials

Sapphire, Pink Sapphire

Certified 3.07 Carat Pinkish Purple Natural Sapphire Oval Cut Loose Gemstone
Certified 3.07 Carat Pinkish Purple Natural Sapphire Oval Cut Loose Gemstone

Certified 3.07 Carat Pinkish Purple Natural Sapphire Oval Cut Loose Gemstone

Located in Peshawar, PK

Certified Pinkish Purple Natural Sapphire Oval Cut Loose Gemstone – Unheated, Top Quality, Jewelry

Category

2010s Malagasy Contemporary Loose Gemstones

Materials

Sapphire, Purple Sapphire

3.95 Ct Certified UNHEATED COLOR CHANGE Sapphire Pear Loose Gemstone
3.95 Ct Certified UNHEATED COLOR CHANGE Sapphire Pear Loose Gemstone

3.95 Ct Certified UNHEATED COLOR CHANGE Sapphire Pear Loose Gemstone

Located in Fort Lee, NJ

available as a loose gemstone & matching your gem with our ready selection of beautiful ring styles in

Category

2010s Malagasy Loose Gemstones

Materials

Green Sapphire

Certified 29.9 carats Swat Emerald Sliced Pair Natural Pakistani Gemstone
Certified 29.9 carats Swat Emerald Sliced Pair Natural Pakistani Gemstone

Certified 29.9 carats Swat Emerald Sliced Pair Natural Pakistani Gemstone

Located in Bangkok, TH

example of natural gemstones originating from the renowned Swat Valley in Pakistan, famous for its high

Category

21st Century and Contemporary Pakistani Modern Loose Gemstones

Materials

Emerald

Certified Natural Faceted 12.07 Carat Spessartine Garnet Cushion Cut Gemstone
Certified Natural Faceted 12.07 Carat Spessartine Garnet Cushion Cut Gemstone

Certified Natural Faceted 12.07 Carat Spessartine Garnet Cushion Cut Gemstone

Located in Peshawar, PK

spessartine, is a captivating gemstone prized for its vibrant orange to reddish-orange hues and remarkable

Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Mandarin Garnet

Certified Natural Burmese Oval Cut Ruby Loose Gemstone for Rings
Certified Natural Burmese Oval Cut Ruby Loose Gemstone for Rings

Certified Natural Burmese Oval Cut Ruby Loose Gemstone for Rings

Located in Istanbul, Fatih

Certified Natural Burmese Ruby Oval Cut Loose Gemstone for Rings Color : Deep Red Transparency

Category

21st Century and Contemporary Burmese Loose Gemstones

Materials

Ruby

4.37 Carat Certified Natural Loose Spessartite Garnet Pear Cut African Gemstone
4.37 Carat Certified Natural Loose Spessartite Garnet Pear Cut African Gemstone

4.37 Carat Certified Natural Loose Spessartite Garnet Pear Cut African Gemstone

Located in Bangkok, TH

Pear This stunning 4.37 Carat Certified Natural Loose Spessartite Garnet features a vivid orange

Category

21st Century and Contemporary African Modern Loose Gemstones

Materials

Garnet

Certified 2.56 Carat Natural Loose Emerald Gemstone From Panjshir, Afghanistan
Certified 2.56 Carat Natural Loose Emerald Gemstone From Panjshir, Afghanistan

Certified 2.56 Carat Natural Loose Emerald Gemstone From Panjshir, Afghanistan

Located in Peshawar, PK

limited accessibility, mining and transporting these gemstones to international markets can be risky and

Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Emerald

Certified Natural Burmese Oval Cushion Ruby Loose Gemstone for Rings
Certified Natural Burmese Oval Cushion Ruby Loose Gemstone for Rings

Certified Natural Burmese Oval Cushion Ruby Loose Gemstone for Rings

Located in Istanbul, Fatih

Certified Natural Burmese Ruby Cushion Cut Loose Gemstone for Rings Color : Vivid

Category

21st Century and Contemporary Burmese Loose Gemstones

Materials

Ruby

AIG Certified 1.07 Carat Natural Loose Paraiba Tourmaline Heart Cut Gemstone
AIG Certified 1.07 Carat Natural Loose Paraiba Tourmaline Heart Cut Gemstone

AIG Certified 1.07 Carat Natural Loose Paraiba Tourmaline Heart Cut Gemstone

Located in Peshawar, PK

Paraiba tourmaline is one of the most coveted gemstones in the world, admired for its vivid neon colors

Category

21st Century and Contemporary Mozambican Arts and Crafts Loose Gemstones

Materials

Tourmaline, Paraiba, Other

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Certified Gemstones For Sale on 1stDibs

Browse a vast assortment of certified gemstones for sale on 1stDibs. Frequently made of Gold, Platinum and 18k Gold, these items were constructed with great care. Find a collection of 3 vintage versions or 71 modern creations for a more contemporary example of these cherished accessories. Our collection, which features older pieces for sale from the 20th Century and newer versions made as recently as the 21st Century, has proven very popular over the years. The designs in our inventory of certified gemstones bearing Contemporary or Modern hallmarks are very popular. Many examples in our inventory of these items are appealing no matter their origins, but Merkaba, Tamir and FERRUCCI produced popular versions that are worth a look. Many pieces in our collection are stylish for most occasions, but Diamond versions, from our inventory of 48, can add a particularly distinctive touch to your look, day or night. Today, if you’re looking for oval cut certified gemstones and are unable to find the perfect match, our selection also includes cushion cut and emerald cut alternatives. Most of our certified gemstones for sale are for women, but there are 29 pieces available to browse for men.

How Much are Certified Gemstones?

Prices for certified gemstones start at $353 and top out at $325,000 with these rings, on average, selling for $28,000.

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.