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Dominant species
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Alabandite
Chemical
Formula
MnS
Species
Sulfides
Crystal
System
Isometric
Mohs
Scale
3-4
Specific
Gravity
4.053
Color
black, steelgray, brownish-black
Streak
Green
Luster
Sub-Metallic
Refractive
Index
n = 2.70
Diaphaneity
Opaque
Cleavage
Perfecton
Fracture
Irregular/Uneven
Crystal Habit:mostly massive or granular; cubic or octahedral crystals to 1 cm
Geological Setting:May occur in large quantities in epithermal polymetallic sulfide veins and especially in low-temperature manganese deposits. An uncommon constituent of a number of meteorites.
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