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a high-temperature polymorph of "quartz", and occurs as white octahedrons in the cavities and fine-grained groundmasses of acidic volcanic rocks, kvartsi teisend
cristobalite . EKI terminibaas Esterm. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//esterm/cristobalite/1/eng (23.07.2026)
