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.

What is ruby red glass?

Ruby red glass is a type of glass with a vibrant red color that comes from gold chloride. Ancient glassmakers once used the technique, which was then lost for centuries. In 1676, Andreas Cassius rediscovered the process, but it wasn’t until the end of the 19th century that glassworks began manufacturing ruby red glass in large quantities. Shop a selection of ruby red glassware on 1stDibs.

When was ruby red glass made?

Deep red ruby glass was made in the ancient world, but the process of making the color was lost for centuries before it was rediscovered in the 17th century. On 1stDibs, shop a collection of ruby glass from some of the world’s top sellers.

How can I tell if it’s real ruby red glass?

To tell real ruby red glass, look at the cuts used throughout the design. Most ruby red glass has sharp, dramatic cuts. Because it is easy to confuse with pressed glass, consider having the object evaluated by an experienced and licensed appraiser. Shop a selection of expertly vetted ruby red glass on 1stDibs.

Cobalt Red Glass

White Alabaster Chandelier

Loetz Powolny

Blue Alabaster

Blue Glass Pendant Light

A Wedgwood Majolica Red Lobster Plate on Cobalt Ground, English, Dated 1882

$895

H 0.75 in Dm 8.88 in

A Wedgwood Majolica Red Lobster Plate on Cobalt Ground, English, Dated 1882

By Wedgwood

Located in Banner Elk, NC

A Wedgwood Majolica Lobster Plate, with the central figure of a red-glazed lobster on sea greens on

Category

Antique 19th Century English Victorian Ceramics

Materials

Majolica

Whiskey Crystal Glasses Tumbler Baccarat Style Blue and Red Cut 1970s

$395 / set

H 3.75 in Dm 3 in

Whiskey Crystal Glasses Tumbler Baccarat Style Blue and Red Cut 1970s

By Baccarat

Located in Moreno Valley, CA

. Set of three vintage whiskey glasses tumbler cobalt blue and ruby red crystal Baccarat style

Category

Late 20th Century French Art Deco Barware

Materials

Crystal

Confetti Cobalt Blue and Red Glass Vase by Erika Lagerbielke for Orrefors Sweden

$350

H 12.94 in Dm 4.12 in

Confetti Cobalt Blue and Red Glass Vase by Erika Lagerbielke for Orrefors Sweden

By Orrefors

Located in Clifton Springs, NY

Architectural sommerso cobalt blue vase with minimalistic red accent on the rim was designed by

Category

Late 20th Century Swedish Scandinavian Modern Vases

Materials

Art Glass, Glass, Sommerso

Loetz Papillon Glass And Van Houten Pewter Vase

$2,300

H 10.5 in Dm 5 in

Loetz Papillon Glass And Van Houten Pewter Vase

By Loetz Glass

Located in Dallas, TX

Loetz Mixed Cobalt, Green and Red Papillon Glass Vase. A rare mixed color Iridescent papillon Art

Category

Antique Early 1900s Czech Art Nouveau Vases

Materials

Pewter

Seguso Corroded Cobalt Red Vase in the Shape of a Bottle, 1960s

$667Sale Price|30% Off

H 13.98 in W 3.55 in D 3.55 in

Seguso Corroded Cobalt Red Vase in the Shape of a Bottle, 1960s

By Seguso

Located in Palermo, Sicily

Seguso corroded cobalt red vase in the shape of a bottle, 1960s.

Category

Vintage 1950s Italian Mid-Century Modern Bottles

Materials

Murano Glass

Cobalt Blue Tetris Pendant Light by Dechem Studio

$2,069 / item

H 78.75 in W 11.82 in D 9.06 in

Cobalt Blue Tetris Pendant Light by Dechem Studio

Located in Geneve, CH

produced in different colours, including smoke grey, poppy red, clear glass, cobalt blue and alabaster

Category

2010s Czech Modern Chandeliers and Pendants

Materials

Metal

Trifari Patriotic Bird Statement Necklace with Faux Pearls, Rhinestones & Cobalt

$1,590

L 16 in

Trifari Patriotic Bird Statement Necklace with Faux Pearls, Rhinestones & Cobalt

Located in Milford, DE

embellished with bold red rhinestones, clear chaton crystals, lustrous faux pearls, and deep cobalt-blue glass

Category

21st Century and Contemporary American Classical Greek Pendant Necklaces

Materials

Crystal, Pearl, Gold-filled

Set of 2 Cobalt Blue Tetris Pendant Light by Dechem Studio

$4,170 / set

H 78.75 in W 11.82 in D 9.06 in

Set of 2 Cobalt Blue Tetris Pendant Light by Dechem Studio

Located in Geneve, CH

glass are produced in different colours, including smoke grey, poppy red, clear glass, cobalt blue and

Category

2010s Czech Modern Chandeliers and Pendants

Materials

Metal

Red Tetris Vase by Dechem Studio

$2,311 / item

H 23.63 in W 9.06 in D 11.82 in

Red Tetris Vase by Dechem Studio

Located in Geneve, CH

colours, including smoke grey, poppy red, clear glass, cobalt blue and alabaster white. We are DECHEM

Category

2010s Czech Post-Modern Abstract Sculptures

Materials

Glass

Alabaster White Tetris Pendant Light by Dechem Studio

$2,085 / item

H 78.75 in W 11.82 in D 9.06 in

Alabaster White Tetris Pendant Light by Dechem Studio

Located in Geneve, CH

glass are produced in different colours, including smoke grey, poppy red, clear glass, cobalt blue and

Category

2010s Czech Modern Chandeliers and Pendants

Materials

Metal

Set of 2 Smoke Grey Tetris Pendant Light by Dechem Studio

$4,138 / set

H 78.75 in W 11.82 in D 9.06 in

Set of 2 Smoke Grey Tetris Pendant Light by Dechem Studio

Located in Geneve, CH

glass are produced in different colours, including smoke grey, poppy red, clear glass, cobalt blue and

Category

2010s Czech Modern Chandeliers and Pendants

Materials

Metal

Smoke Grey Tetris Pendant Light by Dechem Studio

$2,069 / item

H 78.75 in W 11.82 in D 9.06 in

Smoke Grey Tetris Pendant Light by Dechem Studio

Located in Geneve, CH

produced in different colours, including smoke grey, poppy red, clear glass, cobalt blue and alabaster

Category

2010s Czech Modern Chandeliers and Pendants

Materials

Metal

Set of 2 Crystal Clear Tetris Pendant Light by Dechem Studio

$4,138 / set

H 78.75 in W 11.82 in D 9.06 in

Set of 2 Crystal Clear Tetris Pendant Light by Dechem Studio

Located in Geneve, CH

glass are produced in different colours, including smoke grey, poppy red, clear glass, cobalt blue and

Category

2010s Czech Modern Chandeliers and Pendants

Materials

Metal

Set of 2 Alabaster White Tetris Pendant Light by Dechem Studio

$4,138 / set

H 78.75 in W 11.82 in D 9.06 in

Set of 2 Alabaster White Tetris Pendant Light by Dechem Studio

Located in Geneve, CH

glass are produced in different colours, including smoke grey, poppy red, clear glass, cobalt blue and

Category

2010s Czech Modern Chandeliers and Pendants

Materials

Metal

Crystal Clear Tetris Pendant Light by Dechem Studio

$2,085 / item

H 78.75 in W 11.82 in D 9.06 in

Crystal Clear Tetris Pendant Light by Dechem Studio

Located in Geneve, CH

produced in different colours, including smoke grey, poppy red, clear glass, cobalt blue and alabaster

Category

2010s Czech Modern Chandeliers and Pendants

Materials

Metal

Blue And White Porcelain Snuff Bottle – Early 20th Century

$413

H 3.04 in W 1.19 in D 1.19 in

Blue And White Porcelain Snuff Bottle – Early 20th Century

Located in Bilzen, BE

). Details: Material: Porcelain with underglaze cobalt blue decoration Stopper: Red glass cabochon with

Category

Early 20th Century Chinese Qing Scholar's Objects

Materials

Porcelain

Recent Sales

Saint Louis Gold Thistle Cobalt, Red, Amethyst, Sky Blue Hocks, Set of 4

Unavailable

H 8.25 in Dm 3.12 in

Saint Louis Gold Thistle Cobalt, Red, Amethyst, Sky Blue Hocks, Set of 4

By Saint Louis

Located in South Newfane, VT

Four gold encrusted, colored hocks from the Saint Louis gold thistle pattern. One each in cobalt

Category

Late 20th Century French Crystal Serveware

Materials

Crystal, Gold

Saint Louis Crystal Gold Thistle Cobalt and Red Champagne Flutes, Set of 2

Unavailable

H 7.5 in Dm 2.25 in

Saint Louis Crystal Gold Thistle Cobalt and Red Champagne Flutes, Set of 2

By Saint Louis

Located in South Newfane, VT

the New Year! One in cobalt, the other in red, these elegant flutes are from the Saint Louis Gold

Category

Late 20th Century French Crystal Serveware

Materials

Crystal, Gold

Dale ChihulyDale Chihuly Cobalt Blue Basket with Candmium Red Lip Sold Out Edition Sculpture, 1994

Unavailable

H 9 in Dm 8 in

Dale Chihuly Cobalt Blue Basket with Candmium Red Lip Sold Out Edition Sculpture

By Dale Chihuly

Located in Minneapolis, MN

Dale Chihuly - Cobalt Blue Macchia Basket with Cadmium Red Lip Wrap, 1994 Medium: Hand-blown Glass

Category

Early 2000s Abstract Abstract Sculptures

Materials

Glass

Vintage Murano Sommerso Glass Ashtray by Flavio Poli for Seguso, 1960s

Sold

H 11.62 in W 3.55 in D 2.37 in

Vintage Murano Sommerso Glass Ashtray by Flavio Poli for Seguso, 1960s

By Flavio Poli

Located in Esbjerg, DK

Heavy and thick decorative longneck vase composed of cobalt blue and deep red Sommerso glass

Category

Vintage 1960s Italian Mid-Century Modern Vases

Materials

Blown Glass

Large Victorian Iron Church Prayer Candle Stand Altar

Sold

H 44 in W 32 in D 18 in

Large Victorian Iron Church Prayer Candle Stand Altar

Located in Las Vegas, NV

red and cobalt blue glass votive. As found with hanging brass incense Thurible also. Measures: 44 x

Category

Early 20th Century Victorian More Candle Holders

Materials

Iron

Early 20th Century French Opticians Trade Sign

Sold

H 8 in W 14 in D 1 in

Early 20th Century French Opticians Trade Sign

Located in London, GB

trade sign, in the form of a brass oversized pair of cobalt blue and ruby red glasses. This item would

Category

Vintage 1910s British Victorian Signs

Materials

Brass

Six Murano Martini Glass, Clear with Cobalt, Red and Green Sphere, Cenedese

Sold

H 6.5 in Dm 4.93 in

Six Murano Martini Glass, Clear with Cobalt, Red and Green Sphere, Cenedese

By Gino Cenedese, Cenedese, Amelio Cenedese

Located in Tavarnelle val di Pesa, Florence

connected to the stem with a glass sphere in three different colors Cobalt blue, cadmium red and green

Category

Vintage 1960s Italian Mid-Century Modern Barware

Materials

Art Glass, Blown Glass, Murano Glass

Dale Chihuly Signed Cobalt Blue Cadmium Red Lip Glass Basket Vase 1994 w/ Case

Sold

H 13.75 in W 12.5 in D 12.5 in

Dale Chihuly Signed Cobalt Blue Cadmium Red Lip Glass Basket Vase 1994 w/ Case

By Dale Chihuly

Located in Keego Harbor, MI

A dynamic hand-blown cobalt blue “Basket” vase by Dale Chihuly. Etched signature on underside

Category

1990s American Decorative Bowls

Materials

Blown Glass

Murano Sculpture Hand Blown Glass Pelican with Goldfish Italian Design 1960s

Sold

H 11.25 in W 7 in D 4 in

Murano Sculpture Hand Blown Glass Pelican with Goldfish Italian Design 1960s

By Murano Glass Sommerso, Archimede Seguso

Located in Moreno Valley, CA

. Gracious form, rich colors that seem to flow inside the glass and create a delicate play of light in cobalt

Category

Late 20th Century Italian Post-Modern Animal Sculptures

Materials

Art Glass

Mid-Century Hand-Blown Murano Glass Emerald Green & Millefiori Detailed Bowl

Sold

H 2.75 in W 8 in D 5 in

Mid-Century Hand-Blown Murano Glass Emerald Green & Millefiori Detailed Bowl

Located in New York, NY

, vermillion red, jade, cobalt, and white glass spotted moment of color. The undersurface of the bowl is lined

Category

Vintage 1960s Italian Mid-Century Modern Decorative Bowls

Materials

Murano Glass

Loetz "Michael Powolny" Art Deco Handblown Orange and Cobalt Bowl

Sold

H 2.5 in Dm 9 in

Loetz "Michael Powolny" Art Deco Handblown Orange and Cobalt Bowl

By Michael Powolny

Located in Manhattan, NY

cobalt glass handles and cobalt glass rim.

Category

Vintage 1910s Czech Art Deco Glass

Materials

Blown Glass

Vase Loetz Cobalt Papillion with Red Undercoating and Rare Spaun Signature

Sold

H 5.71 in

Vase Loetz Cobalt Papillion with Red Undercoating and Rare Spaun Signature

By Loetz Glass

Located in Vienna, AT

This vase stands out due to its intense, blue colours and the very elegant, iridescent and ruby-red

Category

Antique 19th Century Austrian Art Nouveau Vases

19th Century Gilden Wood Optometrist or Optician Storefront Trade Sign

Sold

H 9.5 in W 35 in D 2 in

19th Century Gilden Wood Optometrist or Optician Storefront Trade Sign

Located in Chicago, IL

sign featuring the highly desirable anaglyph lenses consisting of cobalt blue and ruby red "flash glass

Category

Antique Late 19th Century American Signs

Materials

Glass, Wood

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Nachtmann Traube Bohemian Cranberry Cut Clear Crystal Decanter & Shot Glasses

$280Sale Price / set|20% Off

H 15 in Dm 4 in

Nachtmann Traube Bohemian Cranberry Cut Clear Crystal Decanter & Shot Glasses

By Nachtmann

Located in Dayton, OH

Vintage Nachtmann Traube bohemian / Bavarian bar set featuring four crystal cordial shot glasses (wine hock) and matching decanter with cranberry (red / pink) cut to clear finish dep...

Category

Late 20th Century Bohemian Barware

Materials

Crystal

Rare 19th Century Italian Memento Mori Bust / Sculpture Carrara Marble Vanitas

$22,632

H 28.75 in W 15.75 in D 8.67 in

Rare 19th Century Italian Memento Mori Bust / Sculpture Carrara Marble Vanitas

Located in Ijzendijke, NL

Masterfully carved Italian Vanitas / Memento Mori bust in solid marble from late 19th century. White Carrara marble skull combined with masterfully carved hood & robes all from one...

Category

Antique Late 19th Century Italian Renaissance Revival Busts

Materials

Carrara Marble

Rare Moses Michelangelo Guggenheim & Pauly Cie Et Venice Antique Carved Armoire

$341,290

H 100.6 in W 66.93 in D 24.81 in

Rare Moses Michelangelo Guggenheim & Pauly Cie Et Venice Antique Carved Armoire

By Guggenheim Museum, Pauly et Cie

Located in West Sussex, Pulborough

We are delighted to offer for sale this very rare one of a kind Pauly CIE Et stamped hand carved walnut armoire made by the genius that was Moses Michelangelo Guggenheim 1837-1910 W...

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Antique 19th Century Italian Victorian Wardrobes and Armoires

Materials

Walnut

Art Nouveau Lamp, Patinated Bronze and Stained Glass, Tiffany style, 1980's

$11,319

H 29.53 in Dm 23.63 in

Art Nouveau Lamp, Patinated Bronze and Stained Glass, Tiffany style, 1980's

By Tiffany Studios, Louis Comfort Tiffany

Located in VÉZELAY, FR

We are delighted to offer this stunning Art Nouveau style salon lamp, a faithful reinterpretation of the "Hanging Head Dragonfly Shade and Mosaic and Turtleback Base" model created b...

Category

Vintage 1980s Unknown Art Nouveau Table Lamps

Materials

Metal, Brass, Bronze

Tiffany Studios New York "Damascene" Favrile Glass Vase

$22,500

H 5.875 in Dm 5.5 in

Tiffany Studios New York "Damascene" Favrile Glass Vase

By Tiffany Studios

Located in New York, NY

This arresting Damascene Favrile Glass Vase bears a swirling pattern of blue and purple iridescence and ochre glass. The vase's pattern is based upon Damascus steel, whereby near eas...

Category

Early 20th Century American Art Nouveau Vases

Materials

Glass

Tall Tiffany Studios Banded Dogwood Leaded Glass And Bronze Table Lamp

Sold|~~$69,000~~

H 31 in Dm 20.5 in

Tall Tiffany Studios Banded Dogwood Leaded Glass And Bronze Table Lamp

By Tiffany Studios

Located in Dallas, TX

Tiffany Studios Banded Dogwood Leaded Glass and Bronze Art Nouveau Table Lamp. The bronze base is rare and exquisite in this example and is a wonderful marriage to this perfect Bande...

Category

Vintage 1910s American Art Nouveau Table Lamps

Materials

Bronze

Early 20th Century Art Nouveau Glass "Red Sunset Vase" by Daum Frères

$3,890

H 4.73 in W 0 in D 0 in

Early 20th Century Art Nouveau Glass "Red Sunset Vase" by Daum Frères

By Daum

Located in London, GB

"Red Sunset Vase" by Daum Frères A striking and unusual early 20th Century cameo glass vase enamel painted with a green forest landscape against a fiery yellow and orange field, Sig...

Category

Early 20th Century French Art Nouveau Vases

Materials

Glass

Tiffany Studios New York "Greek Key" Table Lamp

$69,500

H 21.75 in Dm 16 in

Tiffany Studios New York "Greek Key" Table Lamp

By Louis Comfort Tiffany, Tiffany Studios

Located in New York, NY

An alluring and visually rewarding example of Tiffany Studios New York's great "Greek Key" table lamp. Mottled glass in hues of warm amber and bright sunshine yellow soften the wonde...

Category

Early 20th Century American Art Nouveau Table Lamps

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Ernesto Valabrega for Studio Vittorio Valabrega Decorative Fireplace Mantel

$27,500

H 46.46 in W 101.58 in D 20.28 in

Ernesto Valabrega for Studio Vittorio Valabrega Decorative Fireplace Mantel

By Vittorio Valabrega

Located in Waalwijk, NL

Ernesto Valabrega for Studio Vittorio Valabrega, decorative fireplace mantel, lacquered wood, plaster, glass, iron, Italy, 1930s This striking decorative fireplace mantel, presumabl...

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Iron

KOENIG & LAFITTE - Art Nouveau stained glass window with bindweed

$34,883

H 96.86 in W 45.28 in D 2.37 in

KOENIG & LAFITTE - Art Nouveau stained glass window with bindweed

By Edward L. Koenig

Located in SAINT-OUEN-SUR-SEINE, FR

This stained glass window was created by Paul Koenig and Lafitte in the early years of the 20th century, during the flowering of Art Nouveau. This draughtsman and engraver, born in É...

Category

Early 20th Century French Art Nouveau Doors and Gates

Materials

Glass, Art Glass, Wood

Art Nouveau Gres Bijou Butterfly & Spiderweb Tall Semiramis Vase by RStK Amphora

$12,000

H 15.75 in W 6.25 in D 6.25 in

Art Nouveau Gres Bijou Butterfly & Spiderweb Tall Semiramis Vase by RStK Amphora

By Reissner Stellmacher & Kessel

Located in Palm Beach, FL

Model #3771 Riessner, Stellmacher and Kessel (RSt&K), consistently marked pieces with the tradename “Amphora” by the late 1890s and became known by that name. The Amphora pottery fa...

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Early 20th C. Tiffany Studios Lemon Leaf Table Lamp

$24,200

H 23 in Dm 18 in

Early 20th C. Tiffany Studios Lemon Leaf Table Lamp

By Tiffany Studios

Located in Los Angeles, CA

Early 20th C. Tiffany Studios Lemon Leaf Table Lamp. Made in U.S.A.

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Vintage 1920s American Table Lamps

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Bronze

Glass Vase Louis C. Tiffany New York Tiffany Studios 1894 signed

$10,723Sale Price|25% Off

H 7.49 in Dm 5.12 in

Glass Vase Louis C. Tiffany New York Tiffany Studios 1894 signed

By Louis Comfort Tiffany

Located in Klosterneuburg, AT

Glass vase designed by Louis C. Tiffany, manufactured by Tiffany Studios New York, 1894, signed signed "L. C. T. B2216" (underneath) Material and technique: mouth-blown glass, redu...

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Antique 1890s American Art Nouveau Vases

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A pair of Spanish-colonial Viceregal mother-of-pearl inlaid bureau-cabinets

$1,117,033

H 83.86 in W 45.28 in D 83.86 in

A pair of Spanish-colonial Viceregal mother-of-pearl inlaid bureau-cabinets

Located in Amsterdam, NL

Viceroyalty of Peru, Lima, 18th century, circa 1720-1760 Each with a moulded giltwood cornice and on a foliate carved giltwood base, possibly later and English. The cabinets, with s...

Category

Antique 18th Century Peruvian Spanish Colonial Cabinets

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Art Nouveau Soufflé Glass Vase with Birds by Muller Frères Lunéville, France

$11,000

H 11 in Dm 10 in

Art Nouveau Soufflé Glass Vase with Birds by Muller Frères Lunéville, France

By Émile Gallé, Muller Fres Lunneville, Muller Frères, Muller Fres Luneville

Located in North Miami, FL

1900s Art Nouveau bulbous frosted soufflé glass vase with trees and birds by Muller Frères Lunéville, France By: Muller Frères Lunéville, Emile Gallé (in the style of) Material: gla...

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Tiffany Studios New York 7-Piece "Pond Lily" Desk Set

$97,500

H 1 in W 1 in D 1 in

Tiffany Studios New York 7-Piece "Pond Lily" Desk Set

By Tiffany Studios, Louis Comfort Tiffany

Located in New York, NY

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Get Updated with New Arrivals

Save "Cobalt Red Glass", and we’ll notify you when there are new listings in this category.

Cobalt Red Glass For Sale on 1stDibs

At 1stDibs, there are many versions of the ideal piece of cobalt red glass for your home. Frequently made of ceramic, porcelain and glass, every item from our selection of cobalt red glass was constructed with great care. There are 456 variations of the antique or vintage choice in our collection of cobalt red glass you’re looking for, while we also have 27 modern editions of this piece to choose from as well. Whether you’re looking for newer or older items, there are earlier versions available from the 18th Century and newer variations made as recently as the 21st Century. An object in our assortment of cobalt red glass, designed in the mid-century modern, Regency or Georgian style, is generally a popular piece of furniture. You’ll likely find more than one option in this array of cobalt red glass that is appealing in its simplicity, but Mason's Ironstone, Royal Crown Derby Porcelain and Coalport Porcelain produced versions that are worth a look.

How Much is a Cobalt Red Glass?

Prices for a piece of cobalt red glass start at $60 and top out at $110,000 with the average selling for $1,137.

Questions About Cobalt Red Glass

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.
What is ruby red glass?
1 Answer
1stDibs ExpertMay 5, 2023
Ruby red glass is a type of glass with a vibrant red color that comes from gold chloride. Ancient glassmakers once used the technique, which was then lost for centuries. In 1676, Andreas Cassius rediscovered the process, but it wasn’t until the end of the 19th century that glassworks began manufacturing ruby red glass in large quantities. Shop a selection of ruby red glassware on 1stDibs.
When was ruby red glass made?
1 Answer
1stDibs ExpertApril 5, 2022
Deep red ruby glass was made in the ancient world, but the process of making the color was lost for centuries before it was rediscovered in the 17th century. On 1stDibs, shop a collection of ruby glass from some of the world’s top sellers.
How can I tell if it’s real ruby red glass?
1 Answer
1stDibs ExpertApril 5, 2022
To tell real ruby red glass, look at the cuts used throughout the design. Most ruby red glass has sharp, dramatic cuts. Because it is easy to confuse with pressed glass, consider having the object evaluated by an experienced and licensed appraiser. Shop a selection of expertly vetted ruby red glass on 1stDibs.