α-quartz, β-quartz, α-tridymite, β-tridymite, α-cristobalite, β-cristobalite, keatite, coesite, stishovite, and moganite.
α-kremen, β-kremen, α-tridimit, β-tridimit, α-kristobalit, β-kristobalit, keatit, koezit, stishovit in moganit.