Biotite Information
Biotite is one of the most common black minerals on the earth's surface, usually in the form of hexagonal prisms to hexagonal plates found in granite and other rocks. It is a beautiful natural stone that sparkles at different angles.Features of Biotite Beads
Crystallography:MonoclinicMohs hardness: 2.5-3 Birthstone: --- Typical treatments: --- Occurrence: China