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Quartz

By Rikou

June 6, 2007
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https://www.geoforum.fr/gallery/image/1056-quartz/

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[b]Anciennes mines de fer de St-Quentin-Fallavier (38)[/b]
Cristaux tapissant l'interieur des loges d'une ammonite ([i]Phylloceras sp.[/i])
Grossissement x 20

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Microminéraux en photos

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https://www.geoforum.fr/gallery/image/1056-quartz/

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