Every cameo carved by hand is a one of a kind piece. Most cameos are carved from shell and there is no way an artist could carve two exactly the same. This is a grey mother of pearl vintage brooch. This cameo started life as something else as you can see from the back of the pin. It may have originally been a closure for a necklace or a bracelet but someone decided to make it into a brooch.
I think the reason the artist decided to make this piece into a brooch is because as a clasp it may have been hidden and this lady is definitely meant to be seen.
Length: 1.25 inches