• Cummingtonite

    Origin

    Cummington + -ite, since it was originally discovered in Cummington, Massachusetts.

    Full definition of cummingtonite

    Noun

    cummingtonite

    (plural cummingtonites)
    1. (mineral) A mineral, magnesium-iron silicate hydroxide, (Mg,Fe)7Si8O22(OH)2.
    © Wiktionary
    • © 2013 - 2023 All Rights Reserved