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Gold With Brannerite

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LGM639484

Gold With Brannerite

Ex Lehnen collection, Möchgengladbach, Germany
New Discovery

Description Tabs

Description
Locality: 
Haute-Savoie, Auvergne-Rhône-Alpes, France
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.5 × 2.8 × 0.9 cm
Weight: 
6.50gr
Description

This specimen features bright lustrous crystalline gold together with in-grown black brannerite crystals (with a few defined faces). The matrix is light smoky quartz.

It is from a quite new discovery at a high-alpine locality, found in 2015 by french stahlers one valley away from well-known La Gardette gold mine. Only a dozen pieces or so were found and the exact locality is still top-secret.

Significantly radioactive due to content of U (appr. 14.2 micro Sv/h within spitting distance).

 

Mineral Data
What's on the rock

Gold

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

Brannerite

Formula: 
(U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6
Strunz: 
4.DH.05
Crystal System: 
Monoclinic - Prismatic
Hardness: 
4.5 - 5.5
Type Locality: 
Kelley Gulch, Stanley, Stanley Basin District, Custer Co., Idaho, USA

Seller Information

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Seller's terms and conditions

Thank you for viewing my auctions! Maintaining high standards in customer service is extremely important to me. If shipping takes longer than expected, please contact me. It is possible to file an investigation request, and during nearly ten years of e-rocks NO parcel was finally lost.

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I will happily do all in my power to resolve the situation to your satisfaction.

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