noun
goethite
A mineral name used in geology and mineralogy; an iron hydroxide mineral.
針鉄鉱は鉄の水酸化鉱物の一種である。
Goethite is a type of iron hydroxide mineral.
The Japanese name 針鉄鉱 (shintekkō) literally means 'needle iron ore', likely referring to its acicular crystal habit. The English name 'goethite' honors the German poet Goethe.