Formula: CuSiO2(OH)2
Origin of name: From Greek for to see and through
Crystal system: Hexagonal
Crystal class: -3
Twinning:
Unit cell: a = 14.57 Å, c = 7.78 Å
Colour: Emerald green to deep bluish green, turquoise-blue
Diaphaneity:
Luster: Vitreous, somewhat greasy on cleavage
Habit: Crystals short to long prismatic; massive; crystalline aggregates
Hardness: 5
Specific gravity: 3.28 to 3.35
Cleavage: 1; {10-11} perfect
Tenacity: Brittle
Streak: Pale greenish blue
Synonyms/varieties:
Comments:
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