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Zemannite Eurekadumpite & Goldfieldite

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JYJ755546

Zemannite Eurekadumpite & Goldfieldite

Description Tabs

Description
Locality: 
North Star Mine, Mammoth, Tintic District, Juab County, Utah, United States of America
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.3 × 2.1 × 0.9 cm
Description

Yellow zemannite associated with eurekadumpite and black grains of goldfieldite in quartz cavities. 

 

Mineral Data
What's on the rock

Zemannite

Formula: 
Mg(ZnFe)2(TeO3)6·9H2O
Strunz: 
4.JM.05
Crystal System: 
Hexagonal
Hardness: 
0.0
Colour: 
Brown
Type Locality: 
Moctezuma Mine (Bambolla Mine), Moctezuma, Mun. de Moctezuma, Sonora, Mexico

Eurekadumpite

Formula: 
(Cu,Zn)16(TeO3)2(AsO4)3Cl(OH)18 ·7H2O
Hardness: 
2.5 - 3.0
Type Locality: 
Centennial Eureka Mine (Blue Rock), Eureka, Tintic District, East Tintic Mts, Juab Co., Utah, USA

Goldfieldite

Formula: 
Cu10Te4S13
Strunz: 
2.GB.05
Hardness: 
3.0 - 3.5
Type Locality: 
Mohawk Mine, Goldfield, Goldfield District, Esmeralda Co., Nevada, USA