Antique carved conch shell ornate Victorian cameo brooch pendant

Antique carved conch shell ornate Victorian cameo brooch little loop at the top for a bale to be installed. operates as a brooch at this time preownd over 100 yr old item. vg cond. has loads of patina the item is unpolised with some cleaning detail needed stamp is illegible. appears to be gold plated/filled. appx 1.1x1.3” J744