Sylvite

Name:
Sylvite
Detailed information:

Chemistry name:	sylvine
M Formula:	KCl
Properties:
Colorless or white, bluish or reddish in color, white streak, vitreous luster, resembles rock salt in appearance. D 1.97–1.99, Mohs hardness 2.
Occurrence:
West Texas, New Mexico, Europe.
Use:
Major source of potassium compounds in the U.S., fertilizers.