cristobalite

== English == === Etymology === Named for the type locality at Cerro San Cristóbal, Mexico, +‎ -ite. === Noun === cristobalite (countable and uncountable, plural cristobalites) (mineralogy) A mineral of volcanic rocks that solidified at a high temperature. Cristobalite is chemically identical to quartz, with the chemical formula SiO2, but has a different crystal structure. Crystals are always microscopic, and usually form small rounded masses. ==== Translations ==== === See also === Wikipedia article on Silicon dioxide minerals silicate, silica group === Further reading === David Barthelmy (1997–2026), “Cristobalite”, in Webmineral Mineralogy Database. “cristobalite”, in Mindat.org, Keswick, Va.: Hudson Institute of Mineralogy, 2000–2026.