• Coon Creek Science Center 1

    Coon Creek Science Center

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    Osage Rock and Mineral Club

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    Central Iowa Mineral Society

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    Mazon Creek Fossil Beds

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    Herkimer Diamond Mines

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    Gem Mountain Sapphire Mine

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    Ozark Mountain Gem & Mineral Society

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    Colorado School of Mines Geology Museum

    • sheffler rock shop

    Sheffler Rock Shop