A small, antique, iridescent glass, square fireplace tile by Tiffany with a shell design. Cast marks: L.C.T. & Co. PAT. FEB. 8TH 1881. Made at the Heidi glasshouse (Brooklyn, NY). From 1880 to 1893 Tiffany experimented at the Heidi glasshouse before he established his own glasshouse in Corona, New York.