This is a vintage designer Japanese akoya saltwater cultured pearl leaf pin by Harry S. Bick.

If features one pearl and a delicately textured tropical leaf motif. The pearl measures 5.00mm and has great luster with rosy overtones. 

It is in solid sterling silver and is stamped "STERLING" and "HSB". It measures 2 inch across. 

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