Bohdanowiczite

Formula:  AgBiSe₂

Origin of name:  For K. Bohdanowicz, Polish geologist

Crystal system:  Hexagonal

Crystal class:  -3 2/m

Twinning: Polysynthetic

Unit cell: a = 8.412 Å, c = 19.63 Å

Colour:  Lead-gray

Diaphaneity:  Opaque

Luster:  Metallic

Habit:  Anhedral grains

Hardness:  3.2

Specific gravity:  7.87

Cleavage:  None

Tenacity:

Streak:

Synonyms/varieties:

Comments: Found in fluorite and quartz in a strongly cracked zone formed in crystalline limestone adjacent to magnetite-bearing skarns