quartz(redirected from SiO2 Group)
Also found in: Thesaurus, Medical, Encyclopedia.
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.
[German Quarz, from Middle High German quarc, of Slavic origin.]
quartz′ose′ (kwôrt′sōs′) adj.
1. (Minerals) a colourless mineral often tinted by impurities, found in igneous, sedimentary, and metamorphic rocks. It is used in the manufacture of glass, abrasives, and cement, and also as a gemstone; the violet-purple variety is amethyst, the brown variety is cairngorm, the yellow variety is citrine, and the pink variety is rose quartz. Composition: silicon dioxide. Formula: SiO2. Crystal structure: hexagonal
2. (Ceramics) short for quartz glass
[C18: from German Quarz, of Slavic origin]
the commonest mineral, silicon dioxide, SiO2, occurring in crystals, grains, and cryptocrystalline masses: the chief component of sand.
[1750–60; < German Quarz]
quartz•ose (ˈkwɔrt soʊs) quartz′ous (-səs) adj.
A hard, transparent mineral composed of silicon dioxide. Quartz is the most common of all minerals. It occurs as a component of rocks such as sandstone and granite, and separately in a variety of forms such as rock crystal, flint, and agate. Some crystalline forms, such as amethyst, are considered gemstones. Quartz is the mineral used to represent a hardness of 7 on the Mohs scale.
A hard silicate mineral.
Switch to new thesaurus
|Noun||1.||quartz - colorless glass made of almost pure silica|
natural glass - magma of any composition that cooled very rapidly
|2.||quartz - a hard glossy mineral consisting of silicon dioxide in crystal form; present in most rocks (especially sandstone and granite); yellow sand is quartz with iron oxide impurities|
quartz crystal - a thin plate or small rod of quartz cut along certain lines and ground so that it can produce an electric signal at a constant frequency; used in crystal oscillators
atomic number 14, Si, silicon - a tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors
mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
amethyst - a transparent purple variety of quartz; used as a gemstone
citrine - semiprecious yellow quartz resembling topaz
rose quartz - a translucent rose-red variety of quartz used for ornaments
silica, silicon dioxide, silicon oxide - a white or colorless vitreous insoluble solid (SiO2); various forms occur widely in the earth's crust as quartz or cristobalite or tridymite or lechatelierite
كوارْتز: صُوّان شَفّاف مُتَبَلْوِر
quartz(kwoːts) noun, adjective
(of) a kind of hard substance found in rocks, often in the form of crystals. kwarts كوارْتز: صُوّان شَفّاف مُتَبَلْوِر кварц quartzo křemen(ný) Quarz; Quarz-... kvarts; kvarts- χαλαζίαςcuarzo kvarts کوارتز kvartsi quartz קְווָארץ बिल्लौर kvarc kvarc kuarsa kvars quarzo; di quarzo 石英(の) 석영 kvarcas kvarcs kuarza kwartskvartskwarc كوار تس، ځلاندى او پړكيدونكى ډبرې، بلور quartzo (de/din) cuarţ кварц kremeň; kremeňový kremenjak kvarc kvarts แร่ควอทซ kuvars 石英［的］ кварц سلکا کی ایک معدنی شکل ، صوان سنگ مرمر thạch anh 石英（的）