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Goldfieldite & Native Gold

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JYJ573404

Goldfieldite & Native Gold

Description Tabs

Description
Locality: 
May Day Mine, La Plata County, Colorado, United States of America
Class: 
Massive/Crystalline
Size Range: 
Thumbnail (1-3cm)
Size: 
2.6 × 1.2 × 0.8 cm
Description

Interesting sample hosting a layer of gold around an inner relative ore free quartz core. EDS confirmed goldfieldite around the native gold as grey metallic ore. Minor green secondary minerals. 

Mineral Data
What's on the rock

Goldfieldite

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

Gold

Formula: 
Au
Strunz: 
1.AA.05
Crystal System: 
Isometric
Hardness: 
2.5 - 3.0