This lovely antique, gray and white shell cameo, still a brooch, also has a "no show" bail that I installed. If the chain is removed, it can then be worn as a brooch. The brooch itself measures 1 1/2" by 1 1/8". The engraving around the rim of the bezel is beautiful. I do not know the gold content of this piece. Nor am I a cameo expert. Please check the pictures closely. The gold plated chain is 18" long. I work with antique and vintage parts. Some may show signs of wear or age. Please look at each picture closely. I have tried to show all aspects of my work. Please contact me before purchasing if you have any questions or would like more clarity in a picture. I like to think that older items have a character that newer parts have not yet earned.