A set of 12 antique, matching Tiffany favrile glass prisms with marbleization in a dark, slightly greenish, olive bronze color. The slag effect is more apparent on the flat backs of the prisms.
Attributed to Tiffany Studios (New York, NY, 1878-1933)
Late 19th/early 20th century
(12) Width 1 Depth 0.5 Height 5.5 inches
Note: some edge chips.