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Dominant species
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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.
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