Formula: H8V6O16
Origin of name: Locality; near Dolores River, Colorado
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: Dark brown when pure; nearly black
Diaphaneity: Opaque
Luster: Submetallic, tarnishes dark bronze
Habit: Crystals minute; massive, radiating botryoidal structure
Hardness:
Specific gravity: 3.27 to 3.33
Cleavage: None
Tenacity:
Streak: Greenish black
Synonyms/varieties:
Comments:
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