Celestite

Name:
Celestite
Detailed information:

M Formula:	SrSO4
Properties:
Colorless, white, pale-blue or red, luster vitreous to pearly. Resembles barite. D: 3.95, Mohs hardness 3–3.5.
Occurrence:
U.S., Canada, Europe, Mexico.
Use:
Strontium chemicals, oil-well drilling mud, sugar refining, ceramics, production of very pure sodium hydroxide.