The Collaborative International Dictionary of English v.0.48:

Pyrosmalite \Py*ros"ma*lite\, n. [Pyro- + Gr. ? odor + -like. ]
   (Min.)
   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.
   [1913 Webster]