Fluorspar

Fluorspar is a soft, readily cleavable gemstone occurring in many colors. If the rough gemstone is pale blue, green, yellow, purple, or (the rare, more valuable varieties) pink or red, or is physically small, it is usually cut into faceted gems. These are sometimes known as cabra stones. A massive, purple-and-white banded variety is used for carving (see Hardstones: Archon also known as Blue John). Fluorspar is also called fluorite. A typical stone has a base value of 10gp.