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Native Gold Keystoneite & Hessite

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JYJ998869

Native Gold Keystoneite & Hessite

Description Tabs

Description
Locality: 
McAlpine Mine, Peñon Blanco Peak, Tuolomne County, California, United States of America
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
10 × 5.5 × 3 cm
Description

Native gold with grey metallic hessite and yellow keystoneite on quartz. 

SEM-EDS confirmed. Very rich specimen. 

 

Mineral Data
What's on the rock

Gold

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

Keystoneite

Formula: 
(Ni,Mg,Fe,Mn)3Te3O9·5H2O
Strunz: 
4.JM.05
Hardness: 
0.0
Type Locality: 
Keystone Mine, Magnolia District, Boulder Co., Colorado, USA

Hessite

Formula: 
Ag2Te
Strunz: 
2.BA.60
Hardness: 
2.0 - 3.0
Streak: 
black
Type Locality: 
Koz'modem'yanskii shaft, Second Zavodinskii Mine (Second Sawodinsk Mine), Zyryanovsk Rayon, Altai Mts (Rudnyi Altai), Eastern Kazakhstan Province (Shyghys Qazaqstan Oblysy; Vostochno-Kazakhstanskaya Oblast'), Kazakhstan...