- an orthorhombic mineral, FeS, that is dimorphic with pyrite; iron sulfide
- this mineral cut and mounted on silver or other white metal to look like brilliants
Origin of marcasiteFrench marcassite from Medieval Latin marcasita from Arabic marqash?t? from Persian marqash?sh?
- A mineral with the same composition as pyrite, FeS2, but differing in crystal structure. Also called white iron pyrites .
- An ornament of pyrite, polished steel, or white metal.
Origin of marcasiteMiddle English from Medieval Latin marcasīta from Arabic marqašī&tlowmac;ā from Aramaic marqəšitā from Akkadian mar&hlowbrev;ašu from mar&hlowbrev;aši ancient region in the eastern Iranian plateau