This is a  petite vintage Japanese saltwater akoya cultured pearl ribbon pendant. 

The pearl lustrous and measures is 5.50mm with rosy pink overtones.

It is made of solid 14K yellow gold and features a simple bow design. It measures 1/2 inch total, it is a petite piece. Not stamped but solid 14k, it was converted from a single earring. 

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