Silicon dioxide (SiO2) as a pure crystallinesubstance makes up quartz and related forms such as flint and chalcedony. More generally, silica is the basic chemical constituentcommon to all silicate minerals and magmas.
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Silicon dioxide (SiO2) as a pure crystallinesubstance makes up quartz and related forms such as flint and chalcedony. More generally, silica is the basic chemical constituentcommon to all silicate minerals and magmas.