This is a lovely vintage mid-century leaf style Japanese saltwater akoya cultured pearl brooch.

It features pearls that measure from 5.50-5.75mm. They have great luster with very bright rosy pink overtones. 

It is in solid sterling silver and is stamped "STERLING". It measures 2 inch across. From Japan, 1950's-1980's.

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