Huebnerite
Image: Robert M. Lavinsky (CC BY-SA 3.0)
Mineral NameHuebnerite
Chemical FormulaMnWO₄
Mohs Hardness4.5
Crystal Systemmonoclinic
Lustervitreous
Streak Coloryellowish-brown to reddish-brown
Cleavageperfect on {010}
Fractureuneven
Specific Gravity7.12
Colorsreddish-brown, brownish-red, blackish-red
Transparencytranslucent
Type LocalityPasto Bueno District, Pallasca Province, Ancash Department, Peru
Mineral GroupTungstates
Usesore of tungsten, collector
Associated Mineralsquartz, cassiterite, fluorite, scheelite, muscovite
Rarityuncommon
Description
This specimen features several reddish-brown to dark brown, blade-like prismatic crystals with a submetallic luster, forming a radiating or parallel growth.
Geological Context
Huebnerite typically forms in high-temperature hydrothermal veins associated with granitic intrusions, often found in pegmatites and greisens. It is an important ore mineral for tungsten.
