VS
Name
—
Al₂O₃
Formula
—
Mineral Species
Entry type
—
Oxides & Hydroxides
Chemical class
—
Hexagonal
Crystal system
—
9
Mohs hardness
—
3.98–4.1
Specific gravity
—
White
Streak
—
Adamantine to vitreous; pearly on partings
Luster
—
Partings on {0001} and {1011}, from exsolved böhmite
Cleavage
—
R-3c
Space group
—
Corundum
Structural group
—
Crn · Grandfathered
IMA
—
0
Named in
—
Gray, Brown, Blue, Red, Pink, Yellow, Colorless
Typical colors
—
Al · O
Elements
—