Number 32

Color--------------------Shades of red

Luster------------------nonmetallic, dull to waxy

Streak------------------White

Hardness--------------3.9 - 4.1

Cleavage/-------------Fracture, uneven
Fracture

S.G.---------------------9.0

Special Properties---Is the hardest mineral in our kit.  Has hexagonal crystals.

Formula-----------------Al2O3

Mineral Name---------Corundum

Family-------------------Oxides

Uses---------------------Impure corundum is used extensively as an adrasive.

Corundum