Formula: CuTeO3 . H2O
Origin of name: For Richard Graeme, American mining engineer
Crystal system: Orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell:
Colour: Blue-green
Diaphaneity:
Luster:
Habit: Crystals to 8 mm
Hardness: 3 to 3.5
Specific gravity: 4.13
Cleavage: 2; {010} good, {100} parting
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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