Hübnerite (Wolframite)

Huayllapon Mine, Pasto Bueno, Pampas District, Pallasca Pr., Ancash Dept. Peru

Item-No.: MIN0351
Price: 550.00 EUR 

Siderite, Ferberite (Wolframite)

Panasqueira Mine - Couto Mineiro da Panasqueira, Panasqueira, Covilhã, Castelo Branco District, Portugal

Item-No.: MIN0156
Price: 480.00 EUR 

Wolframite, Zinnwaldite

Cínovec , Krušné Hory Mts, Ústí Region (Bohemia), Czech Republic

Item-No.: MIN0159
Price: 130.00 EUR 

Synonyms:  Cal, Call, Gal, Mock-lead, Prismatic scheelium ore, Tungsttate of Iron and Manganese, Wolfram
IMA Status:  Discredited
Classification:  As single mineral not recognised, Wolframite Group
Chemical formula:  (Fe,Mn,Mg)WO4
Crystal system:  Monoclinic
Density (g/cm3):  9,175 calculated (Mineralienatlas)
Tenacity:  Brittle
Cleavage:  Perfect
Fracture:  Irregular/Uneven
Hardness (Mohs):  5 - 5,5
Colour:  Greyish-black
Lustre:  Sub-Metallic
Streak:  Reddish brown
Application:  Principal ore of tungsten