Image: <bdi><a href="https://www.wikidata.org/wiki/Q56247090" class="extiw" title="d:Q56247090"><span title="mineral collector and dealer">Robert M. Lavinsky</span></a></bdi> (CC BY-SA 3.0)

monoclinicuncommonTungstates

Ferberite

FeWO4

This image features a sharp, blocky, black ferberite crystal exhibiting a submetallic luster, likely showing distinct crystal faces and possibly some striations.

Ferberite Physical Properties

Mohs Hardness

Crystal System

monoclinic

Luster

vitreous

Streak Color

dark reddish brown to brownish black

Cleavage

perfect on {010}

Fracture

uneven to subconchoidal

Specific Gravity

7.4

Colors

black, brownish-black, dark gray

Transparency

opaque

Type Locality

Panasqueira, Covilhã, Castelo Branco District, Portugal

Mineral Group

Tungstates

Uses

ore of tungsten, collector

Associated Minerals

quartz, muscovite, cassiterite, arsenopyrite, pyrite, chalcopyrite, fluorite, apatite, topaz

Rarity

uncommon

Geological Context

Ferberite is typically found in high-temperature hydrothermal veins, often associated with granitic intrusions, and can occur in greisen and pegmatite deposits.

Back to Collection

Related Specimens

Albite

Sphalerite

Sapphire

Epsomite

Albite

Epistilbite