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mineral de oro calaverite

  • Gold Wikipedia

    Gold is a chemical element with symbol Au (from Latin: aurum) and atomic number 79, making it one of the higher atomic number elements that occur naturally. In its purest form, it is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal.

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  • Gold: Gold mineral information and data. Mindat.org

    Gold is one of the first minerals used by prehistoric cultures. The Latin name for this mineral was "aurum" and Jöns Jakob Berzelius used Au to represent the element when he established the current system of chemical symbols.

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  • Fine Collector Mineral Specimens Andy Seibel

    Website Specializing in High Quality Mineral Specimens for Collectors

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  • Excalibur Mineral Corporation Current List

    Excalibur Mineral Corporation is a complete mineralogist's heaven! Excellent quality mineral specimens, microscopes, UV lamps, Photographic Guide to Mineral Species on CD-ROM, mineral models, and an analytical lab with SEM and EDS instruments in it's Peekskill, NY home

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  • Copper, Silver and Gold

    Contents. The Royal Family; Copper; Silver; Gold; References; The Royal Family. Copper, silver and gold are found in elemental or "native" form at the earth's surface.

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  • Mineral Shows Mineral Specimens, News & Reports

    The leading internet connection for what's new at the Denver and Tucson Gem, Mineral, and Fossil Shows!

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