VS
Name
—
Ca(SO₄)·2H₂O
Formula
—
Mineral Species
Entry type
—
Sulfates
Chemical class
—
Monoclinic
Crystal system
—
2
Mohs hardness
—
2.31–2.32
Specific gravity
—
White
Streak
—
Subvitreous, pearly on {010} cleavages, silky if fibrous
Luster
—
{010}, perfect; {100}, distinct; {011}
Cleavage
—
I2/a
Space group
—
Gypsum
Structural group
—
Gp · Grandfathered
IMA
—
0
Named in
—
Colorless, White, Gray, Yellow, Brown, Pink
Typical colors
—
Ca · S · O · H
Elements
—