Jamesonite
Chemical Formula	Pb4FeSb6S14
Species	Sulfides
Crystal System	Monoclinic
Mohs Scale	2
Specific Gravity	5.63
Color	gray-black
Streak	gray-black
Luster	Metallic
Diaphaneity	Opaque
Cleavage	Distinct/Good good; also possibly amd
Crystal Habit：Acicular to fibrous and striated parallel . In felted masses of needles. Also massive, fibrous to columnar; radial or plumose at times. In subparallel aggregates of prismatic crystals, forming a columnar mass.
Geological Setting：Late stage hydrothermal mineral formed at moderate to low temperature.