Formula: (Cu,Ni)2(CO3)(OH)2
Origin of name: From Greek for blue and sphere
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: Green
Diaphaneity:
Luster: Dull to subvitreous to silky
Habit: Fibrous in spherules
Hardness: 3 to 4
Specific gravity: 3.78
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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