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From Aragon + -ite, after the province in Spain, named by Abraham Gottlob Werner in 1790.
Etymology from Wiktionary, CC BY-SA 4.0.
aragonite
Today it means: An evaporite consisting of anhydrous calcium carbonate with the chemical formula CaCO₃ and occurring in pearls, shells and nacre; it is dimorphous with calcite. Full definition →