VS
Name
—
CaSO₄·2H₂O
Formula
—
Variety
Entry type
—
Sulfates
Chemical class
—
Monoclinic
Crystal system
—
2
Mohs hardness
—
2.3–2.33
Specific gravity
—
White
Streak
—
Vitreous, Pearly, Silky (satin spar)
Luster
—
Perfect on {010}
Cleavage
—
C2/c (parent gypsum)
Space group
—
—
Structural group
—
—
IMA
—
—
Named in
—
Colorless, White
Typical colors
—
—
Elements
—