Coesite a high pressure polymorph crystal form of silica silicon dioxide SiO2 It has the same chemical composition as the minerals cristobalite stishovite
Coesite is a polymorph of quartz meaning that it is composed of the same chemistry SiO2 but has a different structure Both quartz and coesite are polymorphs
Coesite is a form polymorph of silicon dioxide SiO2 that is formed when very high pressure 2–3 gigapascals and moderately high temperature 700 °C 1 300