This is a vintage branch spray Japanese akoya saltwater cultured pearl brooch.

The pearls are 5.00-6.25mm round. They have great luster with bright rosy pink overtones. White color, good quality. 

It is made of solid sterling silver. It has a single brushed leaf with hand engraving. It is stamped "SILVER" for sterling. It measures 2 inches long. From Japan 1940's-1970's. 

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