Frank L. Hess reported uranium in quartzite of pre-Cambrian age very early in the century (Bulletin of Atomic Scientists).
Useful english dictionary. 2012.
quartz — bi·quartz; quartz; quartz·ic; quartz·if·er·ous; quartz·ite; quartz·it·ic; quartz·oid; quartz·ose; quartz·ous; … English syllables
quartz rock — Quartzite Quartz ite, n. [Cf. F. quartzite.] (Min.) Massive quartz occurring as a rock; a metamorphosed sandstone; called also {quartz rock}. [1913 Webster] … The Collaborative International Dictionary of English
gran´ite|like´ — gran|ite «GRAN iht», noun. 1. a very hard, igneous rock, made up chiefly of the minerals quartz and feldspar, usually with mica and hornblende. Granite is usually gray and is much used for buildings and monuments. 2. Figurative. hardness, as of… … Useful english dictionary
gran|ite — «GRAN iht», noun. 1. a very hard, igneous rock, made up chiefly of the minerals quartz and feldspar, usually with mica and hornblende. Granite is usually gray and is much used for buildings and monuments. 2. Figurative. hardness, as of mind or… … Useful english dictionary
coes|ite — «KOH syt, zyt», noun. a very dense form of silica, occurring naturally in meteoritic or nuclear bomb craters and produced synthetically by subjecting quartz to very high pressure. ╂[< Loring Coes, Jr., born 1915, an American chemist] … Useful english dictionary
cris|to|bal|ite — «krihs TOH buh lyt», noun. silica occurring in small octahedral crystals as a high temperature modification of quartz. ╂[< Cerro San Cristóbal, near Pachuca, Mexico + ite1] … Useful english dictionary
el|van|ite — «EHL vuh nyt», noun. a coarse porphyry composed of quartz and feldspar; granite porphyry … Useful english dictionary
tho|lei|ite — «THOH lee yt», noun. a form of basalt, usually containing quartz and alkalic feldspar: »The tholeiites represent the primary magma generated in the upper mantle beneath the oceans (Lawrence Ogden). ╂[< German Tholeiit < Tholei, a village in … Useful english dictionary
to|nal|ite — «TOH nuh lyt», noun. a granular igneous rock, a variety of diorite, containing quartz and biotite. ╂[< Tonale, a pass in the Tyrol, where it is found] … Useful english dictionary
quartzite — quartz·ite … English syllables
