General Information:
Chemical Formula:
HgS
Composition:
(Molecular Weight = 232.66 gm)
Mercury 86.22 % Hg
Sulfur 13.78 % S
Empirical Formula:
HgS
Environment:
Microscopic grains in metacinnabar.
Locality:
Mt. Diablo mine, Contra Costa County, California, USA.
Name Origin:
Named for its trimorphous relationship with cinnabar and metacinnabar.
Physical Properties:
Cleavage:
None
Color:
red or purple black.
Density:
7.43
Habits:
Microscopic Crystals - Crystals visible only with microscopes., ,
Hardness:
3 - Calcite
Luster:
Adamantine
Streak:
reddish black
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