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Dominant species
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Quartz
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  Home  >>  Mineral Encyclopedia  >>  Mineral Photos  >>  Hubnerite-Hubnerite
Hubnerite
Chemical
Formula
 MnWO4
Species
 Molybdates & Tungstates
Crystal
System
 Monoclinic
Mohs
Scale
 4-4.5
Specific
Gravity
 7.12-7.18
Color
 Yellowish brown to reddish brown, blackish brown, black; Deep red internal reflections in reflected light
Streak
 Yellow to reddish brown, greenish gray
Luster
 Metallic to adamantine towards resinous.
Refractive
Index
 nα=2.17-2.2, nβ=2.22, nγ=2.3-2.32
Diaphaneity
 Transparent to translucent
Cleavage
 Perfect on
Fracture
 Irregular/uneven
Crystal Habit：Prismatic striated crystals, tabular to flattened, in radiating groups
Hubnerite7064
Hubnerite7064
Hubnerite7063
Hubnerite7063
Hubnerite7062
Hubnerite7062
Hubnerite7061
Hubnerite7061

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