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.

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.

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.

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.

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.

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.

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.

Cobalt Blue Spinel

Certified Natural Pearl Necklace

Ceylon Spinel

GIA Certified 1.02 Carat Cobalt Blue Spinel Ring

$6,120

GIA Certified 1.02 Carat Cobalt Blue Spinel Ring

Located in Ben Lomond, CA

This cobalt blue spinel ring features a round cut over 1 carat, offering a rare and stunning

Category

2010s American Contemporary Engagement Rings

Materials

Diamond, Spinel, 18k Gold, White Gold

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

Category

2010s Burmese Loose Gemstones

Materials

Spinel

1.20 Carat Natural Loose Cobalt Blue Spinel Emerald Cut Tanzanian Gemstone

$420

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

Shape Cut Emerald The 1.20 Carat Natural Loose Cobalt Blue Spinel is a captivating gem that

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

: Oxide This stunning **Cobalt Blue Spinel gemstone** is a rare and captivating treasure prized for its

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

Presenting this magnificent 8.46-carat Cobalt Blue Spinel Ring by Spectra Fine Jewelry. Its cushion

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

bright cobalt blue spinels set in 18 karat white gold. Wear alone for a statement or layer with your

Category

21st Century and Contemporary American Tennis Bracelets

Materials

Spinel, Gold, 18k Gold, White Gold

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

Faceted Cobalt Spinel Weight : 1.31 Carat Dimension: 7.84 x 5.94 x 3.80 Mm Colour: Blue Origin

Category

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

Category

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

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

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

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

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! Laboratory certified GFCO Gemstone

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

beauty of nature's finest creations. Identification: Natural Vietnamese Cobalt Blue Spinel • Carat

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

Category

2010s Burmese 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

Faceted Cobalt Spinel Weight : 2.17 Carat Dimension: 7.78 X 7.42 x 4.48 Mm Colour: Blue Origin

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

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

Among all Rare Blue Gemstones, the Cobalt Spinel possesses unique beauty factors such as sparkle

Category

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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

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

, surrounded by a glittering pave' of black and white diamonds Details Blue Cobalt Spinel Cocktail Ring - 18

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

Sold

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

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

Shape octagon Cut emerald This 1.10 carat cobalt blue spinel is a captivating gem of exceptional

Category

21st Century and Contemporary Tanzanian Modern Loose Gemstones

Materials

Spinel

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

Sold

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

Cobalt Blue Spinel takes center stage, showcasing its allure through a Mixed Oval Cut. Originating from

Category

21st Century and Contemporary Tanzanian Modern Loose Gemstones

Materials

Spinel

Lovely Cobalt Blue Natural Spinel 1.22 Carats Spinel Gemstones Spinel Jewelry

Sold

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

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

Category

21st Century and Contemporary Burmese Modern Loose Gemstones

Materials

Spinel

Precious Cobalt Blue Natural Spinel Stone 1.05 Carats AIG Certified Spinel

Sold

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

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

specified Shape Octagon Cut Step This GIA Certified Cobalt Blue Spinel weighs 1.51 carats and showcases

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

Clean Shape Octagon Cut Step This GIA Certified Cobalt Blue Spinel weighs 1.50 carats and showcases

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

Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

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

Sold

'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. Ring

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

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

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

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

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

Category

2010s Burmese Loose Gemstones

Materials

Spinel

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

Sold

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. Origin Tanzania

Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

Edwardian AGL Certified Cobalt Blue Spinel Diamond Natural Pearl Necklace

Sold

Edwardian AGL Certified Cobalt Blue Spinel Diamond Natural Pearl Necklace

Located in Sarasota, FL

blue, natural Cobalt Spinel , large pear shape natural Pearl and approximately 2.00 carats of fine old

Category

Early 20th Century Edwardian More Necklaces

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Diamond, Pearl, Spinel, 18k Gold

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$476Sale Price|20% Off

W 0.33 in D 0.17 in L 0.27 in

1.92 Carat Blue Spinel Lotus Certified

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2010s Sri Lankan Loose Gemstones

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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.
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.
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.
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.
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.
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.
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.