Certified Gemstones

Natural Gemstones

Blue Spinel

Loose Spinel Gemstone

Natural Sandawana Emerald Octagon Cut Certified Gemstone 1.51 Cts Green Emerald.

$691

Natural Sandawana Emerald Octagon Cut Certified Gemstone 1.51 Cts Green Emerald.

Located in Chicago, IL

Natural Sandawana Emerald Octagon Cut Certified Gemstone 1.51 Cts Green Emerald. Certification: IGITL / IGI.

Category

2010s Zimbabwean Art Deco Loose Gemstones

Materials

Emerald

AGL Certified Gemstone Natural Corundum Pink Sapphire Weighing 2.92 Carats

$5,062Sale Price|25% Off

AGL Certified Gemstone Natural Corundum Pink Sapphire Weighing 2.92 Carats

By OGI Ltd

Located in New York, NY

AGL certificate Natural Pink Sapphire weighing 2.92 carats Purplish Pink Color Oval Shaped, mix cut Heated Color Stability Excellent Measuring 8.63x7.11x5.10 mm Natural corundum pi...

Category

Mid-20th Century Sri Lankan Contemporary Loose Gemstones

Materials

Pink Sapphire

Natural 1.18Ct Deep Green Blue Teal Sapphire Heart Cut IGI Certified Gemstone

$410Sale Price|20% Off

Natural 1.18Ct Deep Green Blue Teal Sapphire Heart Cut IGI Certified Gemstone

By Gems and Jewels UK

Located in Birmingham, GB

Natural 1.18Ct Deep Green Blue Teal Sapphire Heart Cut IGI Certified Gemstone Fine Deep Green Blue ‘Teal’ Sapphire In IGI Blister. 1.18 Carat with an excellent heart cut and excelle...

21st Century and Contemporary Malagasy Arts and Crafts Loose Gemstones

Materials

Blue Sapphire, Other

Spinel Blue 3.53Ct natural gemstone, Cushion cut, Tanzania, Certificate GFCO

By GRALJEWELRY

Located in Dublin, D

Natural Blue Spinel Loose gemstone from Tanzania! GFCO Laboratory certified Gemstone Color: greyish Blue Gemstone Type: Spinel Gemstone size: 9.56x8.14x5.13mm Cut Grade: Very Good C...

Category

2010s Tanzanian Loose Gemstones

Materials

Materials

Sapphire, Agate, Diamond, White Diamond

Unavailable

GIA Certified 5.36ct Round F3 Emerald

Located in LA, CA

GIA Certified 5.36ct Emerald F3 Round 10.86 x 10.73 x 7.02 mm GIA #6223646085 A 5.36ct emerald is a substantial and expensive gemstone that is highly prized for its elegance, rarity,...

Category

2010s Loose Gemstones

Materials

Emerald

5.03 ct Cushion Emerald GIA Certified

Unavailable

Unavailable

W 9.37 in D 5.73 in L 8.65 in

GEM certified 3.43 carats Colombian Emerald

Located in PARIS, FR

3.43 carats colombian emerald Dimensions : 9.37 x 8.65 x 5.73 mm Moderate oiling GEM certified ________________________ Emeraude de Colombie pesant 3.43 cts de forme rectang...

Category

21st Century and Contemporary Colombian Loose Gemstones

Materials

Emerald

5.03 ct Cushion Emerald GIA Certified

Unavailable

Unavailable

$310

W 0.56 in D 0.28 in L 0.7 in

Natural Ethiopian Opal Loose gemstone 9.45ct. Oval cabochon, 17.76x14.02x7.04 mm

By GRALJEWELRY

Located in Dublin, D

9.45 Ct., Ethiopian Opal Premium quality. Stone Origin: Welo, Ethiopia Stone dimension (mm): 17.76x14.02x7.04 mm Shape and cut: oval cabochon Stone treatment: Not Enhanced Stone cre...

Category

2010s Ethiopian Loose Gemstones

Materials

Opal

Certified 1.756ct Burmese Pink Sapphire, No Heat, Oval/ Mixed

$1,500

H 0.3 in W 0.23 in D 0.19 in

Certified 1.756ct Burmese Pink Sapphire, No Heat, Oval/ Mixed

Located in เกาะสมุย, TH

A 1.756ct natural Burmese pink sapphire, certified by IGL and cut in an elegant oval mixed cut. Its purplish‑pink color carries a dark tone with medium to high saturation, giving the...

Category

21st Century and Contemporary Burmese Artisan Loose Gemstones

Materials

Pink Sapphire

36.67 Carat Oval Ethiopian Opal Loose Gemstone, Natural Unmounted Opal, Merkaba

$29,800

$6,750

W 0.5 in L 0.84 in

10.96 Carat Ethiopian Opal Oval Loose Gemstone Play of Color by Merkaba Jewelry

By Merkaba

Located in Beverly Hills, CA

Offered unmounted for collectors and bespoke fine jewelry, this 10.96 carat Ethiopian opal is a luminous oval cut gemstone celebrated for its vivid, shifting play of color. Curated b...

Category

21st Century and Contemporary Ethiopian Modern Loose Gemstones

Materials

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

Exceptional, Untreated 2.08 carat Pink Sapphire - Swiss Certified

$5,394Sale Price|50% Off

Exceptional, Untreated 2.08 carat Pink Sapphire - Swiss Certified

Located in London, GB

This exceptional, untreated and stunningly beautiful pink sapphire originates from Madagascar, one of the leading modern sources of fine quality sapphires. Certified by Gem Researc...

Category

21st Century and Contemporary British Loose Gemstones

Materials

Pink Sapphire

8.50 Carat Natural Loose Opal Cabochon From Ethiopia, Africa

$200Sale Price|20% Off

W 0.51 in D 0.29 in L 0.73 in

8.50 Carat Natural Loose Opal Cabochon From Ethiopia, Africa

Located in Peshawar, PK

Loose Opal Cabochon Weight: 8.50 Carats Dimension: 18.4 x 12.9 x 7.3 Mm Origin: Ethiopia Treatment: Non Certificate: On Customer Demand Opal is a mesmerizing gemstone celebrated f...

Category

21st Century and Contemporary Ethiopian Arts and Crafts Loose Gemstones

Materials

Opal

IGI Certified 1.87ct Natural Zambian Emerald Deep Green Octagon Cut Gemstone

Located in Birmingham, GB

IGI Certified 1.87ct Natural Zambian Emerald Deep Green Octagon Cut Gemstone IGI Certified Natural Deep Blue Green Zambian Emerald Gemstone. 1.87 Carat emerald with a beautiful deep...

Category

21st Century and Contemporary Loose Gemstones

Materials

Materials

Topaz, Blue Topaz

Rare 5.73 Carat Natural Red Spinel Emerald Cut – Collector's Luxury Gemstone

$59,000

4.24 Ct Natural Tanzanite Royal Blue color Gemstone Perfect cut clean clarity

Located in bangkok, TH

TZA91~ 4.24 Ct Natural Tanzanite Royal Blue Blue color Gemstone GEM DESCRIPTION Species: Tanzanite Variey: Tanzanite Weight: 4.24 ct Color:Blue Cut: Excellent Clarity: Eye cle...

Category

2010s Loose Gemstones

Materials

Tanzanite

1.02 Ct GUILD Certified No Oil Emerald Zambia eye clean quality Gemstone

$2,080Sale Price|38% Off

1.02 Ct GUILD Certified No Oil Emerald Zambia eye clean quality Gemstone

Located in bangkok, TH

EMA149~ 1.02 Ct GUILD Certified No Oil Emerald Zambia eye clean quality Gemstone GEM DESCRIPTION Species: Natural Beryl Variety: Natural Emerald Weight: 1.02 Ct Color: Green C...

Category

2010s Loose Gemstones

Materials

Emerald

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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.