pyrosmalite

Century Dictionary and Cyclopedia

1. n. A mineral of a liver-brown color, or pistachio-green, occurring in six-sided prisms, with perfect basal cleavage, found in Sweden. It is a silicate of iron and manganese, containing chlorin, the odor of which it exhales when heated.

GNU Webster's 1913

1. n. A mineral, usually of a pale brown or of a gray or grayish green color, consisting chiefly of the hydrous silicate of iron and manganese; -- so called from the odor given off before the blowpipe.