Anhydrous copper(II) sulfate is a white solid.
 It can be produced by dehydration of the normally available pentahydrate copper sulfate.
 In nature, it found as the very rare mineral known as chalcocyanite.
The pentahydrate also occurs in nature as chalcanthite.
 Two other copper sulfates comprise the remaining of these rare minerals: bonattite (trihydrate) and boothite (heptahydrate).
Anhydrous copper(II) sulfate is a white solid.  It can be produced by dehydration of the normally available pentahydrate copper sulfate.  In nature, it found as the very rare mineral known as chalcocyanite. The pentahydrate also occurs in nature as chalcanthite.  Two other copper sulfates comprise the remaining of these rare minerals: bonattite (trihydrate) and boothite (heptahydrate).
Copper(II) sulfate