Formula: CaCuSiO4.H2O
Origin of name: for B. Stringham, American mineralogist
Crystal system: monoclinic
Crystal class: 2/m
Twinning: very common
Unit cell: a = 5.03 Å, b = 16.07 Å, c = 5.30 Å, b = 102.6°
Colour: azure blue
Diaphaneity:
Luster:
Habit: crystals smaller than 0.1 mm
Hardness:
Specific gravity: 3.67
Cleavage: none
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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