The first known use of Cassiterite can be dated back to 1859. The name of this mineral comes from the French word “cassiterite” and the Greek word “kasiteros”. It is an important mineral, being a great source of tin. It is usually black or brown, opaque but with a high luster and with multiple crystals faces that create a nice sparkle. The most known deposits of Cassiterite are in Bolivia. It is sought as a piece of collection and used as a gemstone. For example a 4.5ct Cassiterite crystal is sold for $420.75.