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Utahite & Zemannite

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Utahite & Zemannite

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 × 1.4 × 1.3 cm
Description

Intense blue utahite (SEM-EDS analysed) in cavities of baryte and quartz. Yellow hexagonal zemannite associated with eurekadumpite and goldfieldite.

Very rare!
 

Mineral Data
What's on the rock

Utahite

Formula: 
Cu5Zn3(TeO4)4(OH)8·7H2O
Strunz: 
7.DE.25
Crystal System: 
Triclinic
Hardness: 
4.0 - 5.0
Type Locality: 
Centennial Eureka Mine (Blue Rock), Eureka, Tintic District, East Tintic Mts, Juab Co., Utah, USA

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