Early 1870 Ivory Celluloid Rhinestone Cameo Brooch Pendant

Early 1870 Ivory Celluloid Rhinestone Cameo Brooch Pendant:

Victorian antique very early ivory celluloid cameo brooch pin or pendant. 4 inset cut glass crystal rhinestones. Natural yellowing patina. Back shows several dark marks left over from the forming of the piece. There is a break to the top of one of the loops in the back, small and can be seen in photos. Original metal pin back. 2 14" x 1 3/4" In very good condition.