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    a large red hematite stone surrounded by gray magnetic hematite stones

    Hematite Stone: Rock Science

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    susan-margolis

    Susan Margolis: 40 Years of Carved Gemstones

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    virginia state fossil chesapecten jeffersonius

    State Fossils of America

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    Limestone stalactites and stalagmites fill the caves of Carlsbad Caverns National Park, New Mexico.

    Caves of the National Parks

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    desert-rose-rocks

    Desert Rose Rocks 101

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    rock-tumbling

    Rock Tumbling For Beginners

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    rose-quartz-pink-quartz

    Rose Quartz vs. Pink Quartz

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    rainbow obsidian and lake county diamonds are highly collectible like this large piece of rainbow obsidian

    Lake County Diamonds: Volcanic Gems

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    people attending the gem and mineral shows in tucson in february

    Gem and Mineral Shows: Rockhounding Tucson

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    tumbled snowflake obsidian with snowflakes that are silicon dioxide polymorph cristobalite

    What is Silicon Dioxide? More Than Quartz

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