• Turquoise: The blue mineral turquoise

    Detailed description, properties, locality information guide about the blue mineral turquoise.

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    . .,mn 0 01 05_1 1 10 100 10th 11 11_d0003 12 13 14 141a 143b 15 16 17 17igp 18 19 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915

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  • History of chemistryWikipedia

    The history of chemistry represents a time span from ancient history to the present. By 1000 BC, civilizations used technologies that would eventually form the basis

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  • Fine Collector Mineral SpecimensAndy

    Website Specializing in High Quality Mineral Specimens for Collectors

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  • Full text of "NEW"Internet Archive

    Search the history of over 304 billion web pages on the Internet.

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  • FluorescenceWikipedia

    Fluorescence is the emission of light by a substance that has absorbed light or other electromagnetic radiation. It is a form of luminescence. In most cases, the

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