Nune

Nune was the common name for staurolite (sometimes called "cross stone" or "fairy stone") in the Realms.

Description
These ornamental stones were translucent brown or nearly clear and occurred in small cross-shaped crystals up to one inch (two and a half centimeters) across either arm. These were commonly polished to a smooth sheen and pierced to be worn as pendants or linked as bracelets. On Toril, the cross was used as an ornament and not as a holy symbol. A typical stone had a base value of 10 gp.