輝き鉄てっ鉱こうMeanings1nounspecular iron; specularitemineralogyA mineralogical term for a variety of hematite with a shiny, mirror-like surface. Used in geology and mineralogy contexts.輝き鉄てっ鉱こうは鏡かがみのような光こう沢たくを持もつ鉱こう物ぶつです。Specular iron is a mineral with a mirror-like luster.