Formula: HgO
Origin of name: For Montroyd Sharp, American mine owner
Crystal system: Orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell:
Colour: Dark red, brownish red to brown
Diaphaneity: Transparent to translucent
Luster: Vitreous to adamantine
Habit: Crystals slender prismatic, twisted or bent; equant of flattened; aggregates, tubular, rounded, vermicular; massive, pulverulent
Hardness: 2.5
Specific gravity: 11.2
Cleavage: 1; {010} perfect
Tenacity:
Streak: Yellowish brown
Synonyms/varieties:
Comments:
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