This is a lovely spun silver filigree Japanese akoya saltwater cultured flower brooch.

The pearls are 4.50-6.50mm round. They have great luster with rosy pink overtones. 

It is made of solid sterling silver and set among delicate filigree leaves and petals. It is stamped "STERLING". It measures 2 inches long. From the mid-century. 

All pearls are truly vintage and have only been lightly cleaned. Could use a professional polish if desired.