Is cobalt blue glass valuable?

Moderately priced vintage selections in cobalt blue vary widely in variety and price. You can still find a single Chevron milk pitcher or violin-shaped bottle in this color for well under 30 dollars. Authentic Shirley Temple pieces from the Depression era can still be found for under 50 dollars apiece.

Does cobalt make glass blue?

Most glass will need just 0.5 percent cobalt to produce a striking color. Cobalt is such a strong coloring agent that it can easily make a powerful blue color, but some manufacturers may want a fainter shade of blue.

How can you tell if blue glass is cobalt?

Cobalt blue glass is normally a deep rich blue like the vase on the left. It is made by incorporating cobalt oxide in the molten glass mixture. Most blue glass is given its color either from cobalt oxide or from copper oxide added to the molten glass.

What color does cobalt make glass?

deep blue coloured
Cobalt glass—known as “smalt” when ground as a pigment—is a deep blue coloured glass prepared by including a cobalt compound, typically cobalt oxide or cobalt carbonate, in a glass melt.

How old is cobalt blue glass?

Packaged in an intensely colored cobalt bottle, the medicine was first produced in 1888, and the company used their distinctive cobalt glass bottles until the 1950s. Vicks Vapor Rub and Noxema also used bright cobalt blue glass jars into the 1950s.

What Depression glass is most valuable?

Royal Lace (1934–1941) The most sought after pattern of Depression glass is arguably Royal Lace, which was made by the Hazel-Atlas Glass Company. This pattern was manufactured in green, pink, crystal, and most notably, cobalt blue.

What is cobalt blue made out of?

Cobalt blue is a blue pigment made by sintering cobalt(II) oxide with aluminum(III) oxide (alumina) at 1200 °C. Chemically, cobalt blue pigment is cobalt(II) oxide-aluminium oxide, or cobalt(II) aluminate, CoAl2O4.

How can cobalt blue glass help us see violet and blue light?

Sodium flame has very intense light having yellow color which can dominate other flame colors at small amount of sodium flame. But if we use cobalt blue glass to see the flame it filters out all almost all the sodium light while passing out the light of other colors too like violet of potassium and blue color too.

Is blue Depression glass worth anything?

Blue Mayfair pieces, however, are highly sought-after and can be worth several hundred dollars. The most sought after pattern of Depression glass is arguably Royal Lace, which was made by the Hazel-Atlas Glass Company.

What is the rarest color of Depression glass?

Pink glass is most valuable, followed by blue and green. Rare colors such as tangerine and lavender are also worth more than common colors like yellow and amber.