bn:00014660n
Noun Concept
Categories: Chalcedony, Trigonal minerals, Lithics
EN
chalcedony  calcedony  Canary Stone
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EN
Chalcedony is a cryptocrystalline form of silica, composed of very fine intergrowths of quartz and moganite. Wikipedia
Microcrystalline varieties of silica, may contain moganite as well Wikidata
A form of fine-grained quartz that is nearly transparent or has a milky translucence; it fractures conchoidally. Wiktionary
Form of fine-grained quartz. Wiktionary (translation)
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