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Ferberite

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PDM655404

Ferberite

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Description
Locality: 
Nederland, Sugarloaf, Boulder County, Colorado, United States of America
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.2 × 5 × 3.3 cm
Description

Sharp black crystals of ferberite with good lustre on matrix. I’m told that this is an old piece (found at least 50 years ago), from the John Trimble collection, with a glued number at the rear side.

Mineral Data
What's on the rock

Ferberite

Formula: 
FeWO4
Strunz: 
4.DB.30
Crystal System: 
Monoclinic
Hardness: 
4.0 - 4.5
Type Locality: 
Niña Mine, Sierra Almagrera, Cuevas del Almanzora (Cuevas de Vera), Almería, Andalusia, Spain

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