Definitions for quartziteˈkwɔrt saɪt
Random House Webster's College Dictionary
a granular metamorphic rock consisting essentially of quartz in interlocking grains.
Origin of quartzite:
hard metamorphic rock consisting essentially of interlocking quartz crystals
a metamorphic rock consisting of interlocking grains of quartz
massive quartz occurring as a rock; a metamorphosed sandstone; -- called also quartz rock