毛もう鉱こうMeanings1nounjamesonite; feather oregeologyA sulfosalt mineral with a fibrous, feather-like appearance. Technical term used in geology and mineralogy.毛もう鉱こうは鉛なまりとアンチモンの硫りゅう化か鉱こう物ぶつである。Jamesonite is a sulfide mineral of lead and antimony.