Antique 18K shell cameo . The brooch can be worn as a pin or pendant with retractable bale . The brooch measures 40mm by 30mm. The gold pin back is sturdy and securely locks . The gold frame is handcrafted and the shell cameo is hand carved . The bale is signed however we cannot discern maker . The brooch is also hallmarked 750. We date the brooch circa 1900 , legal antique.