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Wulfenite With Coronadite

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QRI634417

Wulfenite With Coronadite

Classic Locality

Description Tabs

Description
Locality: 
Glove Mine, Tyndall District, Santa Cruz County, Arizona, United States of America
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.6 × 4.2 × 2.8 cm
Largest Crystal: 
0.50cm
Weight: 
80.00gr
Description

A very unusual miniature of black wulfenite crystals from Glove Mine, USA. Tabular crystals of wulfenite are either self standing or interconnected upon a coronadite-rich gossan matrix, quite fine grained and powdery. The lustre varies from good for the large crystals to exceptional for the smaller individuals.

Unusually seen in this quality, this is definitely an Arizona oldtimer.

The specimen is dated back to the 60s, when it was purchased by a Swiss collector.

Mineral Data
What's on the rock

Wulfenite

Formula: 
Pb(MoO4)
Strunz: 
7.GA.05
Crystal System: 
Tetragonal
Hardness: 
2.5 - 3.0
Streak: 
White
Type Locality: 
Bad Bleiberg, Bleiberg District, Gailtaler Alpen & Karnische Alpen, Carinthia, Austria

Coronadite

Formula: 
Pb(Mn64+Mn23+)O16
Strunz: 
4/D.08-70
Crystal System: 
Monoclinic
Hardness: 
4½ - 5
Colour: 
Dark gray, black
Type Locality: 
Horseshoe Mine, Coronado Mine, Coronado vein, Copper Plate Gulch, Copper Mountain District, Greenlee County, Arizona, USA
Isostructural with: 
Cryptomelane
Ferrihollandite
Hollandite
Manjiroite
Strontiomelane

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