Origin of quartzGerman quarz from uncertain or unknown; perhaps
any of various crystallized forms of silica that are transparent, translucent, or colored, used in many ways, esp. as a gem or in making glass, lenses, or quartz crystals
A very hard mineral composed of silica, SiO2, found worldwide in many different types of rocks, including sandstone and granite. Varieties of quartz include agate, chalcedony, chert, flint, opal, and rock crystal.
Origin of quartzGerman Quarz from Middle High German quarc of Slavic origin
A hard, transparent trigonal mineral that, after feldspar, is the most common mineral on the surface of the Earth. It occurs as a component of igneous, metamorphic, and sedimentary rocks as well as in a variety of other forms such as rock crystal, flint, and agate. Some crystalline forms, such as amethyst, are considered gemstones. Chemical formula: SiO2.
(countable and uncountable, plural quartzes)
quartz - Computer Definition
- The rocks are probably of quartz, i.e.
- Jacquerod and Perrot have found that quartz-glass is freely permeable to helium below a red-heat (Comet.
- Gold is obtained chiefly from quartz reefs, but there are still some important alluvial deposits being worked.
- The Upper Devonian was a period of marine retreat; the crustal disturbances of the Lower Devonian were renewed and great quartz-pebble beaches were formed on the rising shore lines, producing the West Coast Range conglomerates of Tasmania, and the similar rocks to the south-east of Mansfield in Victoria.
- The greatest development of quartz reefing is found in Victoria, some of the mines being of great depth.