Zarbrina

Zarbrina was the name given in the Realms to cerussite, an extremely soft lead-like mineral, colorless and easily cut into brilliant faceted gems.

Description
This ornamental stone was usually mounted in ceremonial little-used jewelry, or set in small metal claw mounts into the sleeves or collar-hems of gowns because of its softness. A typical stone had a base value of 10 gp.