Fabianite

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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