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Quartzite can have a grainy, glassy, sandpaper-like surface. Quartzite is a hard, non-foliated metamorphic rock which was originally pure quartz sandstone. [1] [2] Sandstone is converted into quartzite through heating and pressure usually related to tectonic compression within orogenic belts.
Quartz is, therefore, classified structurally as a framework silicate mineral and compositionally as an oxide mineral. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar. [10] Quartz exists in two forms, the normal α-quartz and the high-temperature β-quartz, both of which are chiral. The transformation ...
Salvador Domingo Felipe Jacinto Dalí i Domènech, Marquess of Dalí of Púbol [b] [a] gcYC (11 May 1904 – 23 January 1989), known as Salvador Dalí (/ ˈ d ɑː l i, d ɑː ˈ l iː / DAH-lee, dah-LEE; [2] Catalan: [səlβəˈðo ðəˈli]; Spanish: [salβaˈðoɾ ðaˈli]), [c] was a Spanish surrealist artist renowned for his technical skill, precise draftsmanship, and the striking and ...