VS
Name
—
As₂S₃
Formula
—
Mineral Species
Entry type
—
Sulfides
Chemical class
—
Monoclinic
Crystal system
—
1.5–2
Mohs hardness
—
3.49
Specific gravity
—
Pale lemon-yellow
Streak
—
Resinous, pearly on cleavage surface
Luster
—
Perfect on {010}, imperfect on {100}; cleavage lamellae are flexible
Cleavage
—
P2_1/n
Space group
—
Orpiment
Structural group
—
Orp · Grandfathered
IMA
—
0
Named in
—
Yellow, Orange
Typical colors
—
As · S
Elements
—