noun
aragonite
A carbonate mineral, a polymorph of calcium carbonate. Used in mineralogy and geology.
霰石は方解石と同じ化学組成を持つが、結晶構造が異なる。
Aragonite has the same chemical composition as calcite, but a different crystal structure.
Calcite, another calcium carbonate polymorph; more common and stable than aragonite.
Named after the Aragon region in Spain where it was first identified. The Japanese name 霰石 literally means 'hailstone', likely from its appearance.