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nounvariety of silica containing microcrystalline quartztype of:
Definition that contains chert
- taconite a variety of chert containing magnetite and hematite; mined as a low-grade iron ore
- whin any of various hard colored rocks (especially rocks consisting of chert or basalt)
- whinstone any of various hard colored rocks (especially rocks consisting of chert or basalt)
- cherty resembling or containing chert