strigovite
noun
strig·o·vite
ˈstrigəˌvīt
plural -s
: a mineral Fe3(Al,Fe)3Si3O11(OH)7 consisting of a basic silicate of iron and aluminum of the chlorite group and occurring in dark green crystalline incrustations
Word History
Etymology
German strigovit, from Striegau, Silesia (now Strzegom, Poland) + German -it -ite