Thare mony different varieties o quartz, several o whilk is semi-preciousgemstones. Ispecially in Europe an the Middle East, varieties o quartz haes been syne antiquity the maist commonly uised meenerals in the makkin ojewelry anhairdstane carvins.
The wird "quartz" is derived frae theGerman wird "Quarz" an itsMiddle Heich German auncestor "twarc", that belike oreeginatit inSlavic (cf. Czechtvrdý ("haird"), Polstwardy ("haird")).[6]
↑abcDeer, W. A., R. A. Howie and J. Zussman,An Introduction to the Rock Forming Minerals, Logman, 1966, pp. 340–355ISBN 0-582-44210-9
↑Anthony, John W.; Bideaux, Richard A.; Bladh, Kenneth W. and Nichols, Monte C. (ed.). "Quartz".Handbook of Mineralogy(PDF). III (Halides, Hydroxides, Oxides). Chantilly, VA, US: Mineralogical Society of America.ISBN0962209724.CS1 maint: multiple names: eeditors leet (link)
