Number 31

Color--------------------Bright to dull red

Luster------------------nonmetallic, dull to earthy

Streak------------------Scarlet red

Hardness--------------2.0 - 2.5

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

S.G.---------------------8.0 - 8.2

Special Properties---Forms in low temperature.

Formula-----------------HgS

Mineral Name---------Cinnabar

Family-------------------Sulfides

Uses---------------------Is the main ore of mercury.

Cinnabar