Tiffany favrile
From Melting Pot Wiki
Favrile, Latin for "craftsman" This "Art Nouveau" glass was made by Louis Comfort Tiffany from 1893 to 1933 on Long Island, N.Y. It is an iridescent and unconfined shaped glass, often with silky looking surfaces. Frequently it combined bronze like alloys and other metals to make a range of colors from deep blue to purple, and yellow-gold to green. The glass was very popular in the United States and Europe from 1890 to 1915, and revived in the 1960s.