cristobalite

cris to bal ite |kriˈstōbəˌlīt krɪˈstoʊbəlaɪt | ▶noun a form of silica that is the main component of opal and also occurs as small octahedral crystals. ORIGIN late 19th cent.: named after Cerro San Cristóbal in Mexico, where it was discovered, + -ite 1 .

cristobalite

cristobalite |krɪˈstəʊbəlʌɪt | ▶noun [ mass noun ] a form of silica which is the main component of opal and also occurs as small octahedral crystals. ORIGIN late 19th cent.: named after Cerro San Cristóbal in Mexico, where it was discovered, + -ite 1 .