Signed Coro Rhinestone Seahorse Brooch

This yellow enamel and rhinestone brooch is shaped like a charming seahorse.
I believe made in the 1950s by the Coro costume jewelry company.
Marked Coro on the back.
Has glued in stones but there is a turned stone which makes it look dark.
See last photo. Rest of brooch in good shape.
Measures approximately 2 inches by 7/8 inches.