Parajamesonite

Formula: Pb₄FeSb₆S₁₄

Origin of name: from Greek para = similar and jamesonite

Crystal system: orthorhombic

Crystal class: unknown

Twinning: 

Unit cell: 

Colour: gray

Diaphaneity: opaque

Luster: metallic

Habit: crystals columnar, imperfect rounded faces to 8 mm

Hardness: 2.5 to 3

Specific gravity: 5.48

Cleavage: none

Tenacity: 

Streak: 

Synonyms/varieties:

Comments: dimorphous with jamesonite