Formula: Hg3S2Cl2
Origin of name: From locality; Cordero mine, Humboldt Co., Nevada
Crystal system: Cubic
Crystal class: 23
Twinning:
Unit cell: a = 8.940 Å
Colour: Light orange-pink, changes to light gray to black on exposure to light
Diaphaneity:
Luster:
Habit: Microscopic grains
Hardness:
Specific gravity: 6.85
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments: Dimorphous with lavrentievite. Found as rims and replacements of cinnabar, in lake-bed sediments and underlying silicified rhyolite tuffs, possibly low-temperature secondary origin; in some oxidised hydrothermal deposits.
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