Formula: HgS
Origin of name: From Greek hyper - above and cinnabar
Crystal system: Hexagonal
Crystal class: Unknown
Twinning:
Unit cell:
Colour: Black with purple tint
Diaphaneity:
Luster: Adamantine
Habit: Associated with metacinnabar
Hardness: 3
Specific gravity: 7.43
Cleavage: None
Tenacity:
Streak: Dark black-purple
Synonyms/varieties:
Comments: Trimorphous with cinnabar and metacinnabar
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