白はく鉄てっ鉱こうはくてっこうMeanings1nounmarcasitemineralogy›A mineral, iron sulfide (FeS₂), similar to pyrite but with a different crystal structure. Used in jewelry and as a collector's mineral.白はく鉄てっ鉱こうは黄おう鉄てっ鉱こうとよく
