[Fr.] The name of a mineral ispecies which includes numerous varieties, differing in composition, color, and fusibility. It is hard, brittle, and more or less transparent. The red variety is the most common, but brown, and sometimes green, yellow, and black sorts are found. The variety which includes the precious garnet consists of silicate of alumina together with oxide of iron. It is transparent, and of a deep-red color, and is much prized as a gem.