Garnet, in Mineralogy, a species of the flint genus, of which there are two sub-species, viz. the precious and common. The precious, or oriental, is red, but of various shades; it occurs most commonly crystallized, either as a dodecadron, or as a double eight-sided pyramid. Garnets are found in almost every country where primitive rocks exist. Switzerland and Bohemia are the two countries which furnish them in the most abundance.