. . . . . . . . . . . . . . . . . . . . . . . . . . "QZITE"@en . . "Quartzite"@en . . . . . . . . . . "stable"@en . "Quartzite"@en . . . . . . . . . "Quartzite - A type of metasedimentary rock composed largely of quartz, feldspar and mica. In the Rock Classification Scheme, quartzite is a psammite containing more than 80% quartz. British Geological Survey Research Report RR/99/02, section 3.2 and fig. 5."@en . .