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Geology Specimen, Chert Slice

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Wyndham and District Historical Museum

Chert is a sedimentary rock composed of microcrystalline or cryptocrystalline quartz, the mineral form of silicon dioxide. It occurs as nodules, concretionary masses, and as layered deposits. Chert breaks with a conchoidal fracture, often producing very sharp edges. The term chert encompasses jasper, agate and flint, as well as other, less well known semi-precious stones.

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    31 Balaclava Street, Wyndham

Wyndham and District Historical Museum

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  • Text adapted with permission from Te Papa and Digital NZ

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