Ferberite
A variety of Wolframite Group

What is Ferberite?
Ferberite is a variety of Wolframite and is only separated from the rest of the family by its high iron concentrations. Surprisingly, its appearance lacks the classical coloration of other minerals with similar iron content. It is mined as an ore of tungsten, and collectible crystal specimens aren't common to come by.
Etymology & Origins
Ferberite was discovered in 1863 in Sierra Almagrera, Spain, and named after the German mineralogist Moritz Rudolph Ferber (1805–1875).
Uses & Applications
Ferberite is a source of tungsten in some areas. Tungsten is used for a variety of applications including strengthening alloys, high-temperature applications, cutting and drilling tools, and lighting. High-quality samples are valued among collectors.
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Key Characteristics
Composition of Ferberite
Ferberite is the iron endmember of the manganese - iron wolframite solid solution series. The manganese endmember is hübnerite. Ferberite is a black monoclinic mineral composed of iron(II) tungstate, FeWO4.
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Quick Facts
Physical Properties
- Color
- Black, dark brown in transmitted light
- Hardness (Mohs)
- 4 - 4.5
- Density
- 7.6 g/cm³
- Streak
- Brownish black to black
- Luster
- Metallic
- Crystal System
- Monoclinic
Chemical Properties
- Chemical Formula
- FeWO4
- Elements
- Fe, O, W
Also Known As

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