the.com/ankerite

a chameleon mineral that swaps its iron for magnesium and never tells you when

chemical disguiseiron-rich cousin of dolomite, always swapping metals
named forAustrian mineralogist Mathias Joseph Anker, 1825
goes brownweathers rusty as its iron oxidizes outside
gold companyoften haunts the same rocks as gold ore
slow fizzbarely reacts to acid unless powdered or heated
the.com/
the.com