10 "Ficheiro:Garnet,_quartz,_mica,_pyrite_1.jpg".

Ficheiro:Garnet, quartz, mica, pyrite 1.jpg

French grenat var. spessartine, quartz var. quartz fumé, mica var. muscovite, feldspath var. microcline, pseudomorphe de pyrite : Wushan Spessartine Mine,...


Ficheiro:Garnet, quartz, mica, pyrite.jpg

French grenat var. spessartine, quartz var. quartz fumé, mica var. muscovite, feldspath var. microcline, pseudomorphe de pyrite : Wushan Spessartine Mine,...


Ficheiro:Argillic zone alteration from hydrothermal veins (Orphan Boy Mine, Butte, Montana, USA) 10.jpg

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Ficheiro:Argillic zone alteration from hydrothermal veins (Orphan Boy Mine, Butte, Montana, USA) 9.jpg

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Ficheiro:Argillic zone alteration & hydrothermal veins (Orphan Boy Mine, Butte, Montana, USA) 3.jpg

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Ficheiro:Argillic zone alteration & hydrothermal veins (Orphan Boy Mine, Butte, Montana, USA) 2.jpg

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Ficheiro:Argillic zone alteration from hydrothermal veins (Orphan Boy Mine, Butte, Montana, USA) 14.jpg

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Ficheiro:Dikes intruding tillite (Nipissing Diabase & Gowganda Formation, Paleoproterozoic; Percival Lake roadcut, Ontario, Canada) 27 (46811766905).jpg

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Ficheiro:Dike intruding tillite (Nipissing Diabase & Gowganda Formation, Paleoproterozoic; Percival Lake roadcut, Ontario, Canada) 15 (47674670232).jpg

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