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.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Ferberite before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Ferberite Localities Map
See where Ferberite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
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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Ferberite FAQs
How do I identify Ferberite?
Ferberite can be identified by its hardness of 4 - 4.5 on the Mohs scale, Black color, Metallic luster, Monoclinic crystal system. Look for these key characteristics when examining specimens.
What color is Ferberite?
Ferberite typically appears in Black, dark brown in transmitted light. Color can vary depending on impurities and formation conditions.
How hard is Ferberite?
Ferberite has a hardness of 4 - 4.5 on the Mohs scale. This gives it moderate hardness.
What is the composition of ferberite 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.
