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  • Geology helps map kidney stone formation from tiny to troublesome

    A microscope image of brilliantly colored crystals in a kidney stone.

    A fluorescent microscope image of a thin section of a human kidney stone reveals a complex history of crystal growth layering, fracturing, dissolution and recrystallization.

    Image courtesy of Mayandi Sivaguru


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  • Editor’s note: To reach Bruce Fouke, call 217-244-5431; email  To reach Mayandi Sivaguru, email

    The paper “Human kidney stones: A natural record of universal biomineralization” is available online and from the U. of I. News Bureau.

    DOI: 10.1038/ s41585-021-00469-x