Formula: Bi2O3
Origin of name: from Greek sphaira = sphere and composition
Crystal system: tetragonal
Crystal class: unknown
Twinning:
Unit cell:
Colour: green, yellowish, gray
Diaphaneity:
Luster: adamantine to dull
Habit: tabular crystals to 10 to 20 micron long forming spherulitic aggregates to 0.5 mm
Hardness: 4
Specific gravity: 7.17
Cleavage:
Tenacity:
Streak: white
Synonyms/varieties:
Comments:
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