Ferberite

A variety of Wolframite Group

Rare
Ferberite specimen - rock identification

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.

Ferberite Market Value Calculator

Estimate the market value of Ferberite using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.

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Ferberite Localities Map

See where Ferberite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.

Map preview
North ZoneCentral RidgeSouth Basin

Interactive map layers and collecting notes are available in the app.

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.

More Images

Ferberite specimen 2
© Robert M. Lavinsky

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

FerberiteFerrotungstate
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