File:Gold-pyrite-quartz hydrothermal vein (Central City Mining District, Colorado, USA) 2 (17157253521).jpg

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Gold-pyrite-quartz hydrothermal vein from Colorado, USA. (public display, Leadville Mining Museum, Leadville, Colorado, USA)

This is a gold ore sample from Colorado's Central City Mining District. The whitish-gray material is quartz (SiO2 - silicon dioxide). The deep metallic yellowish material is native gold (Au). The pale, brassy-colored material is pyrite (FeS2 - iron sulfide).

Locality: Central City Mining District, Colorado, USA
Date
Source Gold-pyrite-quartz hydrothermal vein (Central City Mining District, Colorado, USA) 2
Author James St. John

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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/17157253521. It was reviewed on 3 May 2015 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0.

3 May 2015

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current20:48, 3 May 2015Thumbnail for version as of 20:48, 3 May 20152,158 × 1,586 (2.98 MB)Natuur12 (talk | contribs)Transferred from Flickr via Flickr2Commons

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