Formula: FeAl2O4
Origin of name: From Latin name of locality, the Bohemian forest
Crystal system: Cubic
Crystal class: 4/m -3 2/m
Twinning:
Unit cell:
Colour: Black
Diaphaneity: Opaque
Luster:
Habit: Massive, fine granular; embedded grains
Hardness: 7.5 to 8
Specific gravity: 4.32
Cleavage: None
Tenacity:
Streak: Dark green
Synonyms/varieties:
Comments: Series with spinel, with gahnite and with chromite
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