tiles


Note:  Do not rely on this information. It is very old.

Cassiterite

Cassiterite, or tinstone, is the principal ore of tin, and consists of the dioxide SnO2. It occurs largely in Cornwall, Saxony, and India. It is hard and brittle, and has sp. gr. 6 to 7. It crystallises in the tetragonal system, generally forming prisms terminated by pyramids.