Formula: CaB3O5(OH)
Origin of name: For H. Fabian, German geologist
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: Colourless
Diaphaneity:
Luster: Vitreous
Habit: Crystals prismatic
Hardness: 6
Specific gravity: 2.77
Cleavage: 1; {011}
Tenacity:
Streak:
Synonyms/varieties:
Comments: Fluoresces brownish yellow in UV light
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