Formula: Ca6Cu3(SO4)3(OH)12.2H2O
Origin of name: for Karl Ludwig Von Bezing (1945-), Austrian-South African physician and mineral collector, for his contributions to knowledge of mineralogy of the Kalahari manganese field
Crystal system: Monoclinic
Crystal class: 2/m
Twinning: on {001}, twinned by merohedry
Unit cell: a = 15.122, b = 14.358, c = 22.063, β = 108.68°
Colour: Azure blue, dark blue
Diaphaneity: Semitransparent
Luster: Subvitreous, vitreous on fracture
Habit: elongated euhedral crystals up to 1 cm
Hardness: 4
Specific gravity: 2.82
Cleavage: None
Tenacity: Brittle, subconchoidal fracture
Streak: Light blue
Synonyms/varieties:
Comments:
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