Formula: Cu(OH)2
Origin of name: for Francesco Spertini, Canadian geologist
Crystal system: orthorhombic
Crystal class: mm2
Twinning:
Unit cell: a = 2.951, b = 10.592, c = 5.257
Colour: Blue to blue-green
Diaphaneity: Transparent
Luster: Vitreous
Habit: crystals lath-like, in botryoidal aggregates to 100 micron or blade-like in radial aggregates
Hardness: 1
Specific gravity: 3.93
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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