Diaspore

Name:
Diaspore
Detailed information:

M Formula:	Al2O3•H2O
Properties:
White, gray, yellowish, and greenish; luster vitreous to pearly. D 3.35–3.45, Mohs hardness 6.5–7.
Occurrence:
Arkansas, Missouri, Pennsylvania, Switzerland, the former U.S.S.R., Czechoslovakia.
Use:
Refractory, abrasive.