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Loose Cabochon Gemstone

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1 Paraiba Tourmaline Cabouchon 10.58c oval
1 Paraiba Tourmaline Cabouchon 10.58c oval

1 Paraiba Tourmaline Cabouchon 10.58c oval

By Thomas Leyser

Located in Idar-Oberstein, DE

This Paraiba Tourmaline, 10,58c oval 15,5x11,5mm is beautiful in color and shape and comes from Mocambique. The color can be described as swimming pool blue/green.

Category

2010s European Contemporary Loose Gemstones

Materials

Paraiba

Fire Opal From Mexico
Fire Opal From Mexico

Fire Opal From Mexico

$2,000Sale Price|20% Off

Fire Opal From Mexico

Located in New York, NY

Mexico Opal is composed of hydrated silica. It is an amorphous silicate, meaning it does not form crystals. Opals are structurally composed of tiny spheres of silica which, when arr...

Category

2010s Mexican Loose Gemstones

Materials

Fire Opal

Natural 5.53 Ct Australian Gem Opal Crystal Butterfly Wings mined by Sue Cooper
Natural 5.53 Ct Australian Gem Opal Crystal Butterfly Wings mined by Sue Cooper

Natural 5.53 Ct Australian Gem Opal Crystal Butterfly Wings mined by Sue Cooper

Located in BELCONNEN, ACT

This beautiful 5.53 Ct natural Australian gem crystal opal, carved into a pair of butterfly wings, is a truly exceptional addition to any collection, mined by Sue Cooper herself. Its...

Category

2010s Australian Loose Gemstones

Materials

Opal, Crystal

Natural 5.10 Ct Australian Opal Crystal Butterfly Wings mined by Sue Cooper
Natural 5.10 Ct Australian Opal Crystal Butterfly Wings mined by Sue Cooper

Natural 5.10 Ct Australian Opal Crystal Butterfly Wings mined by Sue Cooper

Located in BELCONNEN, ACT

This lovely 5.10 Ct natural Australian crystal opal, carved into a pair of butterfly wings, is a truly exceptional addition to any collection, mined by Sue Cooper herself. Its rarity...

Category

2010s Australian Loose Gemstones

Materials

Crystal, Opal

Natural 5.59 Ct Carved Fossilised Opal carved Flower mined by Sue Cooper
Natural 5.59 Ct Carved Fossilised Opal carved Flower mined by Sue Cooper

Natural 5.59 Ct Carved Fossilised Opal carved Flower mined by Sue Cooper

Located in BELCONNEN, ACT

This beautiful 5.95 Ct Australian crystal opal, carved into a flower, is a truly exceptional addition to any collection, mined by Sue Cooper herself. Its rarity, coupled with the ama...

Category

2010s Australian Loose Gemstones

Materials

Crystal, Opal

Natural 3.33 Ct Crystal Australian Opal Carved Opal mined by Sue Cooper
Natural 3.33 Ct Crystal Australian Opal Carved Opal mined by Sue Cooper

Natural 3.33 Ct Crystal Australian Opal Carved Opal mined by Sue Cooper

Located in BELCONNEN, ACT

This beautiful 3.33 Ct Australian wood replacement opal was mined by Sue Cooper at her Russells opal mine in western Queensland, Australia in 2021. Sue processed the rough opal herse...

Category

2010s Australian Loose Gemstones

Materials

Crystal, Opal

Natural 9.35 Ct Carved Crystal Australian Opal Scarab mined by Sue Cooper
Natural 9.35 Ct Carved Crystal Australian Opal Scarab mined by Sue Cooper

Natural 9.35 Ct Carved Crystal Australian Opal Scarab mined by Sue Cooper

Located in BELCONNEN, ACT

This beautiful 9.35 Ct Australian crystal opal was mined by Sue Cooper at her Russells opal mine in western Queensland, Australia in 2024. Sue processed the rough opal herself and se...

Category

2010s Australian Loose Gemstones

Materials

Crystal, Opal

Natural solid 21.67 Ct Crystal Starfish Australian Opal mined by Sue Cooper
Natural solid 21.67 Ct Crystal Starfish Australian Opal mined by Sue Cooper

Natural solid 21.67 Ct Crystal Starfish Australian Opal mined by Sue Cooper

Located in BELCONNEN, ACT

This beautiful 21.67 Ct Australian gem crystal opal, carved into a large starfish, is a truly exceptional addition to any collection, mined by Sue Cooper herself. Its rarity, coupled...

Category

2010s Australian Loose Gemstones

Materials

Crystal, Opal

Natural 9.47 Ct Australian crystal conch-shell opal carving mined by Sue Cooper
Natural 9.47 Ct Australian crystal conch-shell opal carving mined by Sue Cooper

Natural 9.47 Ct Australian crystal conch-shell opal carving mined by Sue Cooper

Located in BELCONNEN, ACT

This beautiful 9.47 Ct Australian gem crystal opal, carved into a conch shell, is a truly exceptional addition to any collection, mined by Sue Cooper herself. Its rarity, coupled wit...

Category

2010s Australian Loose Gemstones

Materials

Crystal, Opal

Natural 11.94 Ct Australian Crystal Nautilus opal carving mined by Sue Cooper
Natural 11.94 Ct Australian Crystal Nautilus opal carving mined by Sue Cooper

Natural 11.94 Ct Australian Crystal Nautilus opal carving mined by Sue Cooper

Located in BELCONNEN, ACT

This beautiful 11.94 Ct Australian gem crystal opal, carved into a nautilus shell, is a truly exceptional addition to any collection, mined by Sue Cooper herself. Its rarity, coupled...

Category

2010s Australian Loose Gemstones

Materials

Crystal, Opal

Natural 2.75 Ct Australian green and pink black boulder opal mined by Sue Cooper
Natural 2.75 Ct Australian green and pink black boulder opal mined by Sue Cooper

Natural 2.75 Ct Australian green and pink black boulder opal mined by Sue Cooper

Located in BELCONNEN, ACT

This beautiful 2.75 Ct Australian boulder opal was mined by Sue Cooper at her Yaraka opal mine in western Queensland, Australia in 2024. Sue processed the rough opal herself and cut ...

Category

2010s Australian Loose Gemstones

Materials

Opal, Black Opal

Natural 20.39 Ct Australian kite-shaped boulder opal mined by Sue Cooper
Natural 20.39 Ct Australian kite-shaped boulder opal mined by Sue Cooper

Natural 20.39 Ct Australian kite-shaped boulder opal mined by Sue Cooper

Located in BELCONNEN, ACT

This unique 20.39 Ct Australian boulder opal was mined by Sue Cooper at her Yaraka opal mine in western Queensland, Australia in 2020. Sue processed the rough opal herself and cut in...

Category

2010s Australian Loose Gemstones

Materials

Opal, Black Opal

Natural 12.61 Ct Australian green-blue black boulder opal mined by Sue Cooper
Natural 12.61 Ct Australian green-blue black boulder opal mined by Sue Cooper

Natural 12.61 Ct Australian green-blue black boulder opal mined by Sue Cooper

Located in BELCONNEN, ACT

This rare 12.61 Ct Australian black boulder opal was mined by Sue Cooper at her Yaraka opal mine in western Queensland, Australia in 2021. Sue processed the rough opal herself and cu...

Category

2010s Australian Loose Gemstones

Materials

Opal, Black Opal

Natural 5.89 Ct Australian boulder opal mined by Sue Cooper
Natural 5.89 Ct Australian boulder opal mined by Sue Cooper

Natural 5.89 Ct Australian boulder opal mined by Sue Cooper

Located in BELCONNEN, ACT

This amazing 5.89 Ct Australian black boulder opal was mined by Sue Cooper at her Yaraka opal mine in western Queensland, Australia in 2023. Sue processed the rough opal herself and ...

Category

2010s Australian Loose Gemstones

Materials

Opal, Black Opal

18.52 Carats Burmese No-Heat Ruby Natural Sugarloaf For Top Fine Jewelry Gem
18.52 Carats Burmese No-Heat Ruby Natural Sugarloaf For Top Fine Jewelry Gem

18.52 Carats Burmese No-Heat Ruby Natural Sugarloaf For Top Fine Jewelry Gem

Located in Jaipur, RJ

18.52 Carats Burmese No-Heat Ruby Natural Sugarloaf For Top Fine Jewelry Gem Weight: 18.52 Carats Size: 15x13 MM Pieces: 1 Shape: Sugarloaf

Category

21st Century and Contemporary Burmese Art Deco Loose Gemstones

Materials

Ruby

Natural White Australian Coober Pedy Opal Cabochon 19x6.9mm Loose Gemstone
Natural White Australian Coober Pedy Opal Cabochon 19x6.9mm Loose Gemstone

Natural White Australian Coober Pedy Opal Cabochon 19x6.9mm Loose Gemstone

Located in Birmingham, GB

Natural White Australian Coober Pedy Opal Cabochon 19x6.9mm Loose Gemstone Natural Australian Coober Pedy White Opal Cabochon. 1.99 Carat natural solid opal from Coober Pedy Aust...

Category

21st Century and Contemporary More Jewelry

Materials

Opal

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Loose Cabochon Gemstone For Sale on 1stDibs

On 1stDibs, you can find the most appropriate loose cabochon gemstone for your needs in our varied inventory. Creating a loose cabochon gemstone has been a part of the legacy of many jewelers, but those produced by Sarosi By Timeless Gems, Merkaba and Tamir are consistently popular. A loose cabochon gemstone can make for a versatile accessory, but a selection from our variety of 4 Sapphire versions can add an especially stylish touch. Today, if you’re looking for a cabochon version of this piece and are unable to find the perfect match, our selection also includes cushion cut and oval cut alternatives. Finding a loose cabochon gemstone for sale for men should be easy, but there are 11 pieces available to browse for unisex as well as women, too.

How Much is a Loose Cabochon Gemstone?

The price for a loose cabochon gemstone starts at $160 and tops out at $39,960 with these rings, on average, selling for $12,908.

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.