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  • Cat P posted an update in the group Group logo of Fact a Day 2022Fact a Day 2022 5 months ago

    What is a Yooper stone? A gem and mineral dealer in the U.P. has made a glowing discovery. Erik Rintamaki discovered a rock that glows under an ultraviolet light made of a mineral never seen before in Michigan.
    Rintamaki self-named the rocks “Yooperlites” in honor of the endearing nickname “Yooper” for people who live in Michigan’s Upper Peninsula. … The mineral sodalite will fluoresce under longwave ultraviolet illumination, creating the glowing yellowish orange veins of Yooperlites

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