This is an antique half moon and graduated seed pearl brooch.

The the pearls range in size from 1.50-2.00mm with the largest being in the center. The metal is extremely dark on the front and accents the pearls nicely. Back is signed "STERLING". It has a "C" clasp. Measures about 1 3/4 inch long. 

All pearls are truly vintage and have only been lightly cleaned.