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Cumengeite Mimetite & Pseudoboleite

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UVM772147

Cumengeite Mimetite & Pseudoboleite

Classic Locality

Description Tabs

Description
Locality: 
Rowley Mine, Theba, Maricopa County, Arizona, United States of America
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.5 × 2.7 × 1.2 cm
Description

Blue crystals of cumengeite and pseudoboleite associated with cerussite and broken crystals of wulfenite.   In areas, the mimetite is coated by drusy quartz.   A colorful and complex specimen from the outer layer of the cumengeite boulder of 2007.

Mineral Data
What's on the rock

Cumengeite

Formula: 
Pb21Cu20Cl42(OH)40·6H2O
Strunz: 
3.DB.20
Crystal System: 
Tetragonal
Hardness: 
2.5
Streak: 
Sky-blue
Type Locality: 
Santa Rosalía (El Boleo), Boleo District, Mun. de Mulegé, Baja California Sur (BC Sur), Mexico

Mimetite

Formula: 
Pb5(AsO4)3Cl
Strunz: 
8.BN.05
Crystal System: 
Hexagonal
Hardness: 
3.5 - 4.0
Streak: 
White
Type Locality: 
Treue Freundschaft Mine, Johanngeorgenstadt, Johanngeorgenstadt District, Erzgebirge, Saxony, Germany

Pseudoboleite

Formula: 
Pb31Cu24Cl62(OH)48
Strunz: 
3.DB.10
Hardness: 
2.5
Type Locality: 
Santa Rosalía (El Boleo), Boleo District, Mun. de Mulegé, Baja California Sur (BC Sur), Mexico

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