Cobalt glass
From Wikipedia, the free encyclopedia
 |
Please help improve this article or section by expanding it. Further information might be found on the talk page or at requests for expansion. This article has been tagged since January 2007. |
Cobalt glass is a deep blue colored glass prepared by adding cobalt compounds to the molten glass. It is appreciated for its attractive color and is also used as an optical filter in flame tests to filter out the yellow flame caused by the contamination of sodium.
Some people collect objects made from cobalt glass, amassing large collections. One popular example of cobalt glass is Bristol Blue, as in the distinctive blue bottles of Harvey's Bristol Cream sherry.
 |
This material-related article is a stub. You can help Wikipedia by expanding it. |
