fayalite

noun

fa·​yal·​ite

fəˈyäˌlīt,

fīˈä-

plural -s

: a mineral Fe₂SiO₄ consisting of an iron silicate isomeric with olivine and occurring in crystals or massive (specific gravity 4.1)

Word History

Etymology

German fayalit, from Fayal, island in the Azores + German -it -ite

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