Category:Auriferous opalite, Vulcan Mine, Colorado

Media in category "Auriferous opalite, Vulcan Mine, Colorado"

The following 2 files are in this category, out of 2 total.

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  Auriferous opalite, Vulcan Mine, Colorado 1 (14550601619).jpg 2,988 × 1,663; 4.13 MB
  
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  Auriferous opalite, Vulcan Mine, Colorado 2 (14550787507).jpg 3,008 × 2,000; 5.14 MB