File:Crookesite.jpg

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English: Metallic crystal aggregates and crusts of the extremely rare crookesite, a copper-thallium-silver selenide, a mineral full of rare elements; in fact it's the only mineral of almost 5000 that contains Ag, Tl and Se at the same time. Type locality mineral. From: Skrikerum Mine, Valdemarsvik, Östergötland, Sweden.
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Author David Hospital

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Date/TimeThumbnailDimensionsUserComment
current21:01, 24 January 2018Thumbnail for version as of 21:01, 24 January 2018900 × 600 (95 KB)David Hospital (talk | contribs)User created page with UploadWizard

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