Cinnabar

Name:
Cinnabar
Detailed information:

M Formula:	HgS
Properties:
Red, scarlet, reddish-brown to blackish solid, streak scarlet; luster adamantine to dull earthy when impure. D 8.10, Mohs hardness 2.5. Soluble in aqua regia. Has greater optical rotation than any other substance (+325 degrees).
Occurrence:
California, Nevada, Spain, Italy, Mexico, Yugoslavia.
Hazard:
See Mercuric Sulfide, Red.
Use:
The only important ore of mercury.