This is a classic baroque Japanese akoya saltwater cultured pearl mid-century modern drop pendant necklace. 

If features a single, lustrous, pearl measuring 8.75mm. It is good quality and has rosy pink overtones. It is a drop/baroque shape. 

It is set in solid sterling silver and is stamped "SILVER" on the pendant bail. Comes with a solid sterling silver chain. It measures 15.75 inch. Mid-century Japan.

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