Cassiterite
ID: cassiterite
SnO2
Description
Cassiterite is a mineral form of tin(IV) oxide (SnO2), serving as the primary commercial source of tin metal. Geologically, it is identified by its opaque appearance, though thin sections may exhibit translucency. Beyond its role as an ore, cassiterite functions as a semiconductor. In the context of ceramics and glazing, tin oxide—derived from this mineral—is a long-standing opacifier and white pigment. Its thermal stability and chemical properties make it an essential component for achieving opacity in various glaze formulations, where it acts by scattering light to produce a dense, opaque finish.