bn:00018188n
Noun Concept
Categories: Firelighting using percussion, Quartz, Chert, Quartz varieties, Lithics
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chert  Arkansas flint  chert and flint  Cherti  Cherty
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Variety of silica containing microcrystalline quartz WordNet 3.0
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Chert is a hard, fine-grained sedimentary rock composed of microcrystalline or cryptocrystalline quartz, the mineral form of silicon dioxide. Wikipedia
Hard, fine-grained sedimentary rock composed of cryptocrystalline silica Wikidata
WordNet 3.0 & Open English WordNet
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Wikipedia
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