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Mica I dug from a site in Easton Pa.

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Rocks and Minerals272 of 286Azurite Gemmy Willemite Franklin NJ Fluorescent Mineral (Family Collection)
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    Posted 12 years ago

    Spiperato
    (67 items)

    This is the mineral Mica dug from a site I found in my home town.

    The mica group of sheet silicate (phyllosilicate) minerals includes several closely related materials having close to perfect basal cleavage. All are monoclinic, with a tendency towards pseudohexagonal crystals, and are similar in chemical composition. The nearly perfect cleavage, which is the most prominent characteristic of mica, is explained by the hexagonal sheet-like arrangement of its atoms.
    The word "mica" is derived from the Latin word mica, meaning "a crumb", and probably influenced by micare, "to glitter".

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    Comments

    1. Budek Budek, 11 years ago
      What a magnificent find!

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