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Wolframite

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KOV778702

Wolframite

Classic Locality

Description Tabs

Description
Locality: 
Baia Sprie Mine, Baia Sprie, Maramureș County, Romania
Class: 
Crystal Group/Cluster
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.5 × 5.4 × 2.5 cm
Weight: 
93.60gr
Description

Quartz has settled on Wolframite blades. Old specimen I purchased in my early years as a collector (1970s). Quartz-Chalkopyrite matrix, Wolramite (Hübnerite type) & Siderite with 2nd generation Quartz on top of Wolframite. Wonderful composition as seen on the pictures.

Mineral Data
What's on the rock

Wolframite

Synonym Of: 

Hübnerite

Formula: 
MnWO4
Strunz: 
4.DB.30
Hardness: 
4.0 - 4.5

Ferberite

Formula: 
FeWO4
Strunz: 
4.DB.30
Hardness: 
4.0 - 4.5
Formula: 
(Fe2+)WO4 to (Mn2+)WO4
Crystal System: 
Monoclinic
Hardness: 
4 - 4.5
Colour: 
Greyish-black
Streak: 
Reddish Brown