Victorian Gilt Amethyst Glass Sash Brooch. High Victorian 1860 through 1880s. You can see the c-clasp and design dating the brooch. The base for the brooch is likely brass coated with gold with a high polish. Typical of that era. The piece is large at 3 inches wide with a large amethyst glass of rich purple color in an ornate setting full of flowers and vines. Light enough to wear on a sweater, perfect for use with a shawl or belt, which is what it was used for originally.