(ˈkəʊsaɪt) n (Minerals) a form of silicon dioxide produced when high pressure and temperature are applied to quartz
coesite
coesite
[′sē‚zīt] (mineralogy) A high-pressure polymorph of SiO2 formed in nature only under unique physical conditions, requiring pressures of more than 20 kilobars (2 gigapascals); usually found in meteor impact craters.