Formula: NaCaB5O8(OH)2.3H2O
Origin of name: after locality Tuzla salt mine, Bosnia and Herzegovina
Crystal system: monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: colourless to white
Diaphaneity:
Luster: silky to pearly
Habit: crystals prismatic, elongated, 0.1 by 0.1 by 0.5 mm
Hardness: 2 to 3
Specific gravity: 2.21
Cleavage: 1; perfect, parallel to {001}
Tenacity:
Streak: white
Synonyms/varieties:
Comments:
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