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Anthoinite & Ferberite Psm Scheelite

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PDM764671

Anthoinite & Ferberite Psm Scheelite

Pseudomorph

Description Tabs

Description
Locality: 
Kalima, Maniema, DR Congo
Class: 
Crystal Group/Cluster
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.2 × 6 × 2.6 cm
Largest Crystal: 
3.80cm
Description

A “reinite” pseudomorph in a quartz matrix from an unusual area: Kalima, located in the DR Congo. This is an example of good size, where the original scheelite crystal is now completely replaced by black ferberite and white compact microcrystalline anthoinite that fills the numerous cavities. Remarkably in this piece, these geode-like voids are lined with well-defined lustrous ferberite crystals, which is uncommon.

Old example, collected in the late 1950’s. Ex. Francis Coune specimen.

Mineral Data
What's on the rock

Anthoinite

Formula: 
AlWO3(OH)3
Strunz: 
7.GB.35
Crystal System: 
Triclinic
Hardness: 
1.0
Streak: 
White
Type Locality: 
Mt Misobo Mine, Maniema, Democratic Republic of Congo (Zaïre)

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

Scheelite

Formula: 
Ca(WO4)
Strunz: 
7.GA.05
Crystal System: 
Tetragonal
Hardness: 
4.5 - 5.0
Streak: 
White
Type Locality: 
Bispbergs Klack, Säter, Dalarna, Sweden

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