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Herbertsmithite & Cumengeite

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UVM662086

Herbertsmithite & Cumengeite

Description Tabs

Description
Locality: 
Tonopah-Belmont Mine, Tonopah, Maricopa County, Arizona, United States of America
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.2 × 2.2 × 1.3 cm
Description

Tiny green crystals of herbertsmithite associated with blue cumengeite.   Rarely seen material from the locality, collected by Joe Ruiz.

Mineral Data
What's on the rock

Herbertsmithite

Formula: 
Cu3Zn(OH)6Cl2
Strunz: 
3.DA.10c
Hardness: 
3.0 - 3.5
Type Locality: 
Los Tres Presidentes Mine, Caracoles, Sierra Gorda District, Antofagasta Province, Antofagasta Region, Chile

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

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