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  1. Copilot Answer
    CategoryPhosphate mineral · Vivianite group
    FormulaFe · ₃(PO · ₄) · ₂·8H · ₂O
    IMA symbolViv
    Strunz classification8.CE.40 (10 ed)
     A Fossil Maker
    A Fossil Maker
    What do you get when you mix iron, phosphorus, water, and some organic matter? You get vivianite, a fascinating mineral that can change colors and even create fossils.
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