lepidocrocite
noun
lep·i·do·cro·cite
-ˈkrōˌsīt
plural -s
: a ruby red to reddish brown mineral FeO(OH) consisting of an iron oxide hydroxide that is an important constituent of some iron ores and often occurs with goethite
Word History
Etymology
German lepidokrokit, from lepid- + Greek krokē thread + German -it -ite