This is a cute vintage Japanese baroque blue akoya saltwater cultured pearl pendant necklace. 

The pearl measures 6.50mm and is a blue/gray color with good luster and light rosy overtones. It is a very baroque shape.

It is made of solid sterling silver and has a unique design. The pearl is set into a modernist style bail. It comes with a 16 inch chain with a detailed clasp and is stamped "STERLING". From 1940's-1960's.

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