Category:Gold ores (auriferous altered rhyolite)

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Gold ore (auriferous altered rhyolite) in Colorado‎ (13 F)

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Gold ore (auriferous altered rhyolite) (Golden Wonder Vein, Late Oligocene, 27.5 Ma; Golden Wonder Mine, San Juan Mountains, Colorado, USA) 2 (25246150567).jpg 3,548 × 1,949; 4.48 MB

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