What is cobalt spinel?

Cobalt blue spinels are the rarest and most valued type of spinel gemstone. They’re very popular in the modern gem industry and sought after by collectors. On 1stDibs, you’ll find a collection of cobalt spinel jewelry from some of the world’s top sellers.

How can I identify a cobalt Spinel?

True cobalt Spinel have a high-quality blue coloring that won’t glow under a UV light. For detailed analysis, consult a jeweler. Shop a collection of expertly-vetted cobalt spinel jewelry from some of the world’s top sellers on 1stDibs.

Why is cobalt spinel expensive?

Cobalt spinel is typically an expensive gemstone because it is rare. The gemstones feature a highly saturated blue color that sets them apart from other varieties of spinel. You can shop a selection of cobalt spinel gemstone jewelry on 1stDibs.

Is a cobalt spinel gem rare?

Yes, the cobalt spinel gem is extremely rare and is one of the most desirable gems in the industry. It is found in a single mine in Vietnam and is one of the few gems that occur naturally. Shop a collection of expertly vetted gems from some of the world’s top sellers on 1stDibs.

Is all blue glass cobalt?

No, not all blue glass is cobalt glass. Only those made with cobalt oxide can be called cobalt. In some pieces, the presence of copper oxide accounts for the color, however, cobalt glass is much more common. You'll find a collection of cobalt glass on 1stDibs.

Does cobalt make glass blue?

Yes, cobalt oxide makes glass blue. Different amounts of cobalt can be used to create more saturated levels of blue or to simply neutralize yellow for a more clear finish. Copper oxide can also be used to create a blue tinted glass. Shop a collection of cobalt glass from some of the world’s top sellers on 1stDibs.

How can I tell if a glass is cobalt blue?

Cobalt blue glass is a deep blue glass that often gets its color by the addition of cobalt oxide in the molten glass mixture when the glass is being formed. The best way to identify cobalt blue glass is by the color. Shop a collection of cobalt blue glass from some of the world’s top sellers on 1stDibs.

How do you identify cobalt blue glass?

If your glass has a blue tint to it, it is likely cobalt blue glass. There are three shades of cobalt glass; dark cobalt, which has a slight purplish hue, light or cornflower blue and medium blue. To verify its authenticity, check with an appraiser. You can also shop a collection of cobalt blue glass from some of the world’s top sellers on 1stDibs.

How old is cobalt blue glass?

How old cobalt glass is varies greatly. Ancient Mesopotamian examples exist from roughly 2000 BC. In China, cobalt glass became common during the Zhou Dynasty, which lasted from 1122 to 221 BC. European cobalt glass may date back to as early as the 15th century. Shop a collection of antique cobalt glass on 1stDibs.

Cobalt Blue Spinel

Certified Natural Pearl Necklace

Ceylon Spinel

GIL Certified 2.12 Carat Cobalt Blue Spinel from Burma No Heat

$890

W 0.28 in D 0.19 in L 0.3 in

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

1.20 Carat Natural Loose Cobalt Blue Spinel Emerald Cut Tanzanian Gemstone

$336Sale Price|20% Off

W 0.24 in D 0.16 in L 0.25 in

1.20 Carat Natural Loose Cobalt Blue Spinel Emerald Cut Tanzanian Gemstone

Located in Bangkok, TH

Weight 1.20 carat Dimensions 6.3x6.0x3.9mm Treatment None Origin Tanzanian Clarity Eye Clean Shape Cut Emerald The 1.20 Carat Natural Loose Cobalt Blue Spinel is a captivating...

Category

21st Century and Contemporary Tanzanian Modern Loose Gemstones

Materials

Spinel

Natural Cobalt Blue Spinel Gemstone, Top Grade Spinel From Tanzania 3.14 CTs

$9,500

W 0.39 in D 0.18 in L 0.28 in

Natural Cobalt Blue Spinel Gemstone, Top Grade Spinel From Tanzania 3.14 CTs

Located in Peshawar, PK

Color : Cobalt Blue Clarity : SI Treatment :Natural Origin : Tanzania Hardness : 7.5-8 Family : Oxide This stunning **Cobalt Blue Spinel gemstone** is a rare and captivating treasu...

Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

Spectra Fine Jewelry 8.46 Carat Certified Cobalt Blue Spinel Diamond Ring

$57,105

Spectra Fine Jewelry 8.46 Carat Certified Cobalt Blue Spinel Diamond Ring

By Spectra Fine Jewelry

Located in New York, NY

The captivating cobalt blue hue of the Spinel evokes the serenity of a deep ocean, drawing admiration from every angle.

Category

21st Century and Contemporary American Contemporary Cocktail Rings

Materials

Diamond, Spinel, Platinum

12.23 Carat Total Weight Bright Cobalt Blue Spinel 18 Karat White Gold Bracelet

$6,500

L 7 in

12.23 Carat Total Weight Bright Cobalt Blue Spinel 18 Karat White Gold Bracelet

Located in Houston, TX

It features 12.23 carat total weight in bright cobalt blue spinels set in 18 karat white gold. Wear alone for a statement or layer with your other favorite bracelets.

Category

21st Century and Contemporary American Tennis Bracelets

Materials

Spinel, Gold, 18k Gold, White Gold

6.08 Carat Cobalt Blue Spinel from Tanzania - AIG Certified

$8,280Sale Price|40% Off

H 0.26 in W 0.4 in L 0.43 in

6.08 Carat Cobalt Blue Spinel from Tanzania - AIG Certified

Located in Brisbane City, AU

This 6.08 carat cobalt-blue spinel displays the vivid, highly saturated blue colour that has made cobalt-bearing spinel one of the most sought-after gemstones among collectors and fi...

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2010s Tanzanian Loose Gemstones

Materials

Spinel

Certified 1.31 Carat Natural Loose Cobalt Blue Spinel From Tanzania

$750Sale Price|25% Off

W 0.24 in D 0.15 in L 0.31 in

Certified 1.31 Carat Natural Loose Cobalt Blue Spinel From Tanzania

Located in Peshawar, PK

However, in 1984, scientists first identified cobalt as an additional coloring agent for highly saturated blue spinels.

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21st Century and Contemporary Tanzanian Arts and Crafts Loose Gemstones

Materials

Spinel, Other

Bezel Set Cobalt Blue Spinel and Round Diamonds by the Yard Necklace

$2,900

L 18 in

Bezel Set Cobalt Blue Spinel and Round Diamonds by the Yard Necklace

Located in Houston, TX

This diamond by the yard style necklace features bezel set bright blue round spinels alternating with natural round bezel set diamonds set in 14 karat white gold. Lobster clasp closu...

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21st Century and Contemporary American Chain Necklaces

Materials

Diamond, Spinel, Gold, 14k Gold, White Gold

Certified Unheated Cobalt Blue Spinel with Diamond Ring in 18K White Gold

$3,840Sale Price|10% Off

Certified Unheated Cobalt Blue Spinel with Diamond Ring in 18K White Gold

Located in Bangkok, TH

Blue Spinel 3.04 carats with Diamond 0.34 carat Ring set in 18 Karat White Gold Settings (GFCO Gem Lab, Switzerland) Width: 0.9 cm Length: 0.7 cm Ring Size: 54 Total Weight: 6.19...

Category

2010s Thai Contemporary Solitaire Rings

Materials

Diamond, Spinel, 18k Gold, White Gold

3.07 Carat Cobalt Blue Mahenge Spinel Oval Cut Loose Gemstone with Bellerophon

$7,900

W 0.33 in D 0.24 in L 0.39 in

3.07 Carat Cobalt Blue Mahenge Spinel Oval Cut Loose Gemstone with Bellerophon

By Merkaba

Located in Beverly Hills, CA

A rare, collector level cobalt blue spinel from Mahenge, Tanzania, offered loose and unmounted by Merkaba Jewelry Beverly Hills.

Category

21st Century and Contemporary Tanzanian Modern Loose Gemstones

Materials

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

1.16 Carat Natural Violet Ceylon Spinel

$195Sale Price|20% Off

W 0.22 in D 0.14 in L 0.28 in

1.16 Carat Natural Violet Ceylon Spinel

Located in Hua Hin, TH

1.16 Carat Natural Cobalt Blue Spinel from Sri Lanka (Ceylon) Dimension: 6.86 x 5.38 x 3.54 mm Weight: 1.16 Carat Shape: Cushion Cut No Heat GIL Certified Report No: STO2023010552113

Category

2010s Sri Lankan Loose Gemstones

Materials

Spinel

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

$2,550

W 0.31 in D 0.24 in L 0.36 in

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 Cobalt Blue 3.04Ct natural gemstone, Oval cut, Tanzania, GFCO certified

$2,150

W 0.3 in D 0.22 in L 0.4 in

Spinel Cobalt Blue 3.04Ct natural gemstone, Oval cut, Tanzania, GFCO certified

By GRALJEWELRY

Located in Dublin, D

Natural Cobalt Blue Spinel Loose gemstone Origin Tanzania!

Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

Natural Blue Vietnamese Cobalt Spinel Gemstone 0.54 carats with GIA Report

$5,801

H 0.11 in W 0.18 in L 0.25 in

Natural Blue Vietnamese Cobalt Spinel Gemstone 0.54 carats with GIA Report

Located in Los Angeles, CA

Identification: Natural Vietnamese Cobalt Blue Spinel • Carat: 0.54 carats • Shape: Oval • Measurements: 6.17 x 4.51 x 2.78 mm • Cut: Brilliant/ Modified Brilliant • Color: Blu...

Category

21st Century and Contemporary Vietnamese Modern Loose Gemstones

Materials

Spinel

1.98 Carat Natural Blue Cobalt Spinel from Burma

$472Sale Price|20% Off

W 0.31 in D 0.21 in L 0.25 in

1.98 Carat Natural Blue Cobalt Spinel from Burma

Located in Hua Hin, TH

1.98 Carat Natural Blue Cobalt Spinel from Burma Dimension: 7.68 x 6.35 x 5.28 mm Shape: Oval Cut Weight: 1.98 Carat No Heat GIL Certified Report No: St02022102151324

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2010s Burmese Loose Gemstones

Materials

Spinel

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

$760

W 0.26 in D 0.19 in L 0.36 in

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

GFCO Certified 2.17 Carat Natural Loose Blue Cobalt Spinel From Tanzania

$1,200

W 0.3 in D 0.18 in L 0.31 in

GFCO Certified 2.17 Carat Natural Loose Blue Cobalt Spinel From Tanzania

Located in Peshawar, PK

However, in 1984, scientists first identified cobalt as an additional coloring agent for highly saturated blue spinels.

Category

21st Century and Contemporary Tanzanian Arts and Crafts Loose Gemstones

Materials

Spinel

14 Karat White Gold Round Natural Blue Cobalt Spinel Eternity Band

$2,000

14 Karat White Gold Round Natural Blue Cobalt Spinel Eternity Band

Located in Houston, TX

This 14 karat white gold eternity band features fifteen round french set bright blue natural cobalt spinels with a total weight of 4.91 carats.

Category

21st Century and Contemporary North American Band Rings

Materials

Spinel, Gold, 14k Gold, White Gold

Recent Sales

Grs & Gil Certified Cobalt Blue Spinel and Diamond Ring

Unavailable

Grs & Gil Certified Cobalt Blue Spinel and Diamond Ring

Located in Hung Hom, HK

Blue Diamond cannot get close to the supernatural blazing Blue tone of Cobalt Spinel.

Category

2010s Tanzanian Fashion Rings

Materials

Diamond, Spinel, Gold, 18k Gold, White Gold

GEMCOOK JEWELLERY 1.04ct Cobalt Spinel Blue Flower Ring

Unavailable

GEMCOOK JEWELLERY 1.04ct Cobalt Spinel Blue Flower Ring

Located in Bangkok, TH

GEMCOOK JEWELLERY 1.04ct Cobalt Spinel Blue Flower Ring1.04ct Charming cobalt blue~ A circle of flowers inlaid around it~ Girls' hearts overflow again With EGL certificate This stunn...

Category

2010s Chinese Arts and Crafts Cocktail Rings

Materials

Spinel

18 Karat White Gold Blue Cobalt Spinel Ring with Black and White Diamonds

Unavailable

18 Karat White Gold Blue Cobalt Spinel Ring with Black and White Diamonds

By Niquesa

Located in London, GB

A mesmerising cushion cut blue spinel encircled by a delicate ring of brilliant cut diamonds, surrounded by a glittering pave' of black and white diamonds Details Blue Cobalt Spinel...

Category

21st Century and Contemporary Italian Contemporary Cocktail Rings

Materials

Spinel, White Diamond, Black Diamond, 18k Gold, White Gold

Fantastic Cobalt Blue Spinel Gemstone 1.04 Carats Aig Certified Spinel Burma

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Fantastic Cobalt Blue Spinel Gemstone 1.04 Carats Aig Certified Spinel Burma

Located in Bangkok, TH

Fantastic Cobalt Blue Spinel Gemstone, Available For Sale At Wholesale Price Natural High Quality 1.04 Carats Unheated Natural Spinel from Burma.

Category

21st Century and Contemporary Burmese Modern Loose Gemstones

Materials

Spinel

1.10 carats Cobalt Blue Spinel Stone Emerald Cut Tanzanian Gemstone

Sold

W 0.22 in D 0.13 in L 0.28 in

1.10 carats Cobalt Blue Spinel Stone Emerald Cut Tanzanian Gemstone

Located in Bangkok, TH

Perfect for fine jewelry or as a prized addition to any gemstone collection, this cobalt blue spinel is a stunning representation of nature's artistry.

Category

21st Century and Contemporary Tanzanian Modern Loose Gemstones

Materials

Spinel

3.69 carats Cobalt Blue Spinel Stone Oval Mixed Cut Natural Tanzanian Gemstone

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W 0.36 in D 0.2 in L 0.43 in

3.69 carats Cobalt Blue Spinel Stone Oval Mixed Cut Natural Tanzanian Gemstone

Located in Bangkok, TH

With a weight of 3.69 carats, this Tanzanian treasure is a testament to the earth's splendor, combining the rarity of the gem's origin with the skilled craftsmanship of its cut. ...

Category

21st Century and Contemporary Tanzanian Modern Loose Gemstones

Materials

Spinel

Lovely Cobalt Blue Natural Spinel 1.22 Carats Spinel Gemstones Spinel Jewelry

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Lovely Cobalt Blue Natural Spinel 1.22 Carats Spinel Gemstones Spinel Jewelry

Located in Bangkok, TH

Lovely Cobalt Blue Natural Spinel of 1.22 carats from Sri lanka has a wonderful cut in a Oval shape, incredible Blue color.

Category

21st Century and Contemporary Burmese Modern Loose Gemstones

Materials

Spinel

Excellent Cobalt Blue Loose Spinel Gem 1.80 CTS Buy Spinel Gemstone Spinel Ring

Sold

Excellent Cobalt Blue Loose Spinel Gem 1.80 CTS Buy Spinel Gemstone Spinel Ring

Located in Bangkok, TH

Excellent Cobalt Blue Loose Spinel Gem of 1.80 carats from Sri lanka has a wonderful cut in a Triangular shape, incredible Blue color.

Category

21st Century and Contemporary Burmese Modern Loose Gemstones

Materials

Spinel

Precious Cobalt Blue Natural Spinel Stone 1.05 Carats AIG Certified Spinel

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Precious Cobalt Blue Natural Spinel Stone 1.05 Carats AIG Certified Spinel

Located in Bangkok, TH

Precious Cobalt Blue Natural Spinel Stone, Available For Sale At Wholesale Price Natural High Quality 1.05 Carats Unheated Natural Spinel from Sri lanka.

Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Spinel

Natural Cobalt Blue Spinel loose gemstone 3.50 ct, High quality, Origin Tanzania

Sold

W 0.29 in D 0.21 in L 0.42 in

Natural Cobalt Blue Spinel loose gemstone 3.50 ct, High quality, Origin Tanzania

By GRALJEWELRY

Located in Dublin, D

Natural Cobalt Blue Spinel loose gemstone 3.50 ct., High quality, Octagon cut, Origin Tanzania.

Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

GIA Certified 1.51 carats Cobalt Blue Spinel Stone Step Cut Natural Gemstone

Sold

W 0.21 in D 0.17 in L 0.29 in

GIA Certified 1.51 carats Cobalt Blue Spinel Stone Step Cut Natural Gemstone

Located in Bangkok, TH

Cobalt spinel's are highly prized for their rarity, and this specimen, with its vivid blue tone and expert craftsmanship, stands as a true collector's gemstone.

Category

21st Century and Contemporary Modern Loose Gemstones

Materials

Spinel

GIA Certified 1.50 carats Cobalt Blue Spinel Stone Step Cut Natural Gemstone

Sold

W 0.25 in D 0.19 in L 0.26 in

GIA Certified 1.50 carats Cobalt Blue Spinel Stone Step Cut Natural Gemstone

Located in Bangkok, TH

Cobalt spinel's are highly prized for their rarity, and this specimen, with its vivid blue tone and expert craftsmanship, stands as a true collector's gemstone.

Category

21st Century and Contemporary Modern Loose Gemstones

Materials

Spinel

Natural Cobalt Blue spinel quality VS, 3.48 Ct. gemstone, Certificate GFCO

Sold

W 0.31 in D 0.23 in L 0.36 in

Natural Cobalt Blue spinel quality VS, 3.48 Ct. gemstone, Certificate GFCO

By GRALJEWELRY

Located in Dublin, D

Natural Spinel gemstone Laboratory certified Gemstone Color: Blue Gemstone Type: Spinel Gemstone size: 9.05x7.81x5,84mm Cut Grade: Very Good Clarity/Grade: VS Gemstone Shape: Cushio...

Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

'The Blue Moon' - 2.69 Carat Cobalt Blue Spinel Platinum ring with VS diamonds.

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'The Blue Moon' - 2.69 Carat Cobalt Blue Spinel Platinum ring with VS diamonds.

Located in Hua Hin, TH

Platinum ring set with a 2.69 carat Blue Cobalt Spinel & 58pcs. Diamonds total 0.30 carat.

Category

2010s Burmese Engagement Rings

Materials

Diamond, Spinel, Platinum

2.06 Carat Cobalt Blue Ceylon Spinel

Sold

W 0.25 in D 0.21 in L 0.31 in

2.06 Carat Cobalt Blue Ceylon Spinel

Located in Hua Hin, TH

2.06 Carat Natural Cobalt Blue Spinel from Sri Lanka (Ceylon) Dimension: 7.71 x 6.30 x 5.27 mm Weight: 2.06 Carat Shape: Cushion Cut No Heat GIL Certified Report No: STO2023010552108

Category

2010s Sri Lankan Loose Gemstones

Materials

Spinel

Grace of Purplish Gray Burmese Spinel 2.35 carats Radiant Cut Natural Loose Gem

Sold

W 0.27 in D 0.21 in L 0.34 in

Grace of Purplish Gray Burmese Spinel 2.35 carats Radiant Cut Natural Loose Gem

Located in Bangkok, TH

black spinel grey spinel jedi spinel cobalt blue spinel spinel rock natural spinel

Category

21st Century and Contemporary Burmese Modern Loose Gemstones

Materials

Spinel

GIL Certified 1.91 Carat Cobalt Blue Natural Spinel from Burma

Sold

W 0.31 in D 0.2 in L 0.28 in

GIL Certified 1.91 Carat Cobalt Blue Natural Spinel from Burma

Located in Hua Hin, TH

GIL Certified 1.91 carat Cobalt Blue Natural Spinel from Burma Weight: 1.91 Carat Dimension: 7.66 x 6.99 x 4.86 mm Cut: Oval No Heat

Category

2010s Burmese Loose Gemstones

Materials

Spinel

GFCO Certified Natural 2.40Ct Blue Cobalt Spinel gemstone, Origin Tanzania.

Sold

W 0.27 in D 0.19 in L 0.36 in

GFCO Certified Natural 2.40Ct Blue Cobalt Spinel gemstone, Origin Tanzania.

By GRALJEWELRY

Located in Dublin, D

Natural Blue Cobalt Spinel gemstone GFCO Laboratory certified Gemstone Color: Blue Gemstone Type: Spinel Gemstone size: 8.98x6.67x4.69mm Cut Grade: Very Good Clarity/Grade: VS Gemst...

Category

21st Century and Contemporary Tanzanian Loose Gemstones

Materials

Spinel

GIL Certified 1.79 Carat Cobalt Blue Natural Spinel from Burma Untreated

Sold

W 0.31 in D 0.19 in L 0.25 in

GIL Certified 1.79 Carat Cobalt Blue Natural Spinel from Burma Untreated

Located in Hua Hin, TH

GIL Certified 1.79 Carat Cobalt Blue Natural Spinel from Burma Dimension: 7.84 x 6.32 x 4.59 mm Weight: 1.79 Carat Cut: Oval No Heat

Category

2010s Burmese Loose Gemstones

Materials

Spinel

Natural Spinel Cobalt blue Loose Gemstone 2.04 Ct., Certificate, cushion cut.

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W 0.24 in D 0.2 in L 0.33 in

Natural Spinel Cobalt blue Loose Gemstone 2.04 Ct., Certificate, cushion cut.

By GRALJEWELRY

Located in Dublin, D

Natural Spinel Cobalt blue Loose Gemstone 2.04 Ct., Certificate, cushion cut.

Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

Edwardian AGL Certified Cobalt Blue Spinel Diamond Natural Pearl Necklace

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Edwardian AGL Certified Cobalt Blue Spinel Diamond Natural Pearl Necklace

Located in Sarasota, FL

Magnificent and Rare, this early twenteth century Edwardian necklace contains a 10.03 carat vivid blue, natural Cobalt Spinel , large pear shape natural Pearl and approximately 2.00 ...

Category

Early 20th Century Edwardian More Necklaces

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Diamond, Pearl, Spinel, 18k Gold

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Located in Peshawar, PK

Loose Swiss Blue Topaz Weight: 18.00 Carats Dimensions: 17.8 x 12 x 9.1 Mm Origin: Brazil Shape: Octagon Color: Blue Certificate: On Demand Benefits Of Wearing Swiss Blue Topaz Sto...

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1.19 Carat Natural Violet Ceylon Spinel

$200Sale Price|20% Off

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1.19 Carat Natural Violet Ceylon Spinel

Located in Hua Hin, TH

1.19 Carat Natural Violet Spinel from Sri Lanka (Ceylon) Dimension: 6.64 x 5.63 x 3.83 mm Weight: 1.19 Carat Shape: Cushion Cut No Heat GIL Certified Report No: STO2023010552110

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Spinel

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$476Sale Price|20% Off

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Located in Hua Hin, TH

1.92 Carat Blue Spinel from Sri Lanka Shape: Antique. Cushion Cutting Style: Faceted Brilliant Modified Step Dimensions: 8.20 x 6.62 x 4.13 mm Color: Blue with medium saturation and ...

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Unheated 3.18ct Padparadscha Sapphire & Diamond Ring No Heat AIGS

Located in bangkok, TH

A simply stunning Estate ring set in solid Platinum and featuring a sensational Unheated Padparadscha Sapphire almost certainly from Sri Lanka weighing an immense 3.18ctct. The beaut...

Category

2010s Cocktail Rings

Materials

Diamond, Sapphire, Padparadscha Sapphire , Platinum

VAN CLEEF & ARPELS Folie des Pres Broderie Diamond Gold Earrings & Ring Set

$79,500

VAN CLEEF & ARPELS Folie des Pres Broderie Diamond Gold Earrings & Ring Set

By Van Cleef & Arpels

Located in New York, NY

This impressive Van Cleef & Arpels clip-on earrings and ring Demi-Parure set from the floral Folie des Près is crafted in 18k white gold and set round pink sapphires, marquise tsavor...

Category

Early 2000s Lever-Back Earrings

Materials

Diamond, Garnet, Pink Sapphire, 18k Gold, White Gold

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Cobalt Blue Spinel For Sale on 1stDibs

You are likely to find exactly the cobalt blue spinel you’re looking for on 1stDibs, as there is a broad range for sale. Every item for sale was constructed with extraordinary care, often using 18k gold, gold and platinum. For this particular accessory, there are many different carat weights to choose from, but 1.5 carat and 2 carat versions are of considerable interest. Finding an appealing cobalt blue spinel — no matter the origin — is easy, but Merkaba each produced a popular version that is worth a look. An oval cut version of this piece has appeal, but there are also antique cushion cut and octagon cut versions for sale. When shopping for a cobalt blue spinel, you’ll find that there are less available pieces for unisex or men today than there are for women.

How Much is a Cobalt Blue Spinel?

The price for a cobalt blue spinel starts at $300 and tops out at $9,900 with these rings, on average, selling for $590.

Questions About Cobalt Blue Spinel

What is cobalt spinel?
1 Answer
1stDibs ExpertApril 5, 2022
Cobalt blue spinels are the rarest and most valued type of spinel gemstone. They’re very popular in the modern gem industry and sought after by collectors. On 1stDibs, you’ll find a collection of cobalt spinel jewelry from some of the world’s top sellers.
How can I identify a cobalt Spinel?
1 Answer
1stDibs ExpertApril 5, 2022
True cobalt Spinel have a high-quality blue coloring that won’t glow under a UV light. For detailed analysis, consult a jeweler. Shop a collection of expertly-vetted cobalt spinel jewelry from some of the world’s top sellers on 1stDibs.
Why is cobalt spinel expensive?
1 Answer
1stDibs ExpertApril 5, 2022
Cobalt spinel is typically an expensive gemstone because it is rare. The gemstones feature a highly saturated blue color that sets them apart from other varieties of spinel. You can shop a selection of cobalt spinel gemstone jewelry on 1stDibs.
Is a cobalt spinel gem rare?
1 Answer
1stDibs ExpertApril 5, 2022
Yes, the cobalt spinel gem is extremely rare and is one of the most desirable gems in the industry. It is found in a single mine in Vietnam and is one of the few gems that occur naturally. Shop a collection of expertly vetted gems from some of the world’s top sellers on 1stDibs.
Is all blue glass cobalt?
1 Answer
1stDibs ExpertApril 5, 2022
No, not all blue glass is cobalt glass. Only those made with cobalt oxide can be called cobalt. In some pieces, the presence of copper oxide accounts for the color, however, cobalt glass is much more common. You'll find a collection of cobalt glass on 1stDibs.
Does cobalt make glass blue?
1 Answer
1stDibs ExpertApril 5, 2022
Yes, cobalt oxide makes glass blue. Different amounts of cobalt can be used to create more saturated levels of blue or to simply neutralize yellow for a more clear finish. Copper oxide can also be used to create a blue tinted glass. Shop a collection of cobalt glass from some of the world’s top sellers on 1stDibs.
How can I tell if a glass is cobalt blue?
1 Answer
1stDibs ExpertApril 5, 2022
Cobalt blue glass is a deep blue glass that often gets its color by the addition of cobalt oxide in the molten glass mixture when the glass is being formed. The best way to identify cobalt blue glass is by the color. Shop a collection of cobalt blue glass from some of the world’s top sellers on 1stDibs.
How do you identify cobalt blue glass?
1 Answer
1stDibs ExpertApril 5, 2022
If your glass has a blue tint to it, it is likely cobalt blue glass. There are three shades of cobalt glass; dark cobalt, which has a slight purplish hue, light or cornflower blue and medium blue. To verify its authenticity, check with an appraiser. You can also shop a collection of cobalt blue glass from some of the world’s top sellers on 1stDibs.
How old is cobalt blue glass?
1 Answer
1stDibs ExpertApril 5, 2022
How old cobalt glass is varies greatly. Ancient Mesopotamian examples exist from roughly 2000 BC. In China, cobalt glass became common during the Zhou Dynasty, which lasted from 1122 to 221 BC. European cobalt glass may date back to as early as the 15th century. Shop a collection of antique cobalt glass on 1stDibs.