| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024quartz /kwɔrts/USA pronunciation n. [uncountable]- Mineralogya mineral, silicon dioxide, found in crystals and grains, and the chief part of sand.
WordReference Random House Unabridged Dictionary of American English © 2024quartz (kwôrts),USA pronunciation n. - Mineralogyone of the commonest minerals, silicon dioxide, SiO2, having many varieties that differ in color, luster, etc., and occurring either in masses (as agate, bloodstone, chalcedony, jasper, etc.) or in crystals (as rock crystal, amethyst, citrine, etc.): the chief constituent of sand and sandstone, and an important constituent of many other rocks. It is piezoelectric and used to control the frequencies of radio transmitters.
quartz•ose (kwôrt′sōs),USA pronunciation quartz•ous (kwôrt′səs),USA pronunciation adj. Collins Concise English Dictionary © HarperCollins Publishers:: quartz /kwɔːts/ n - 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
Etymology: 18th Century: from German Quarz, of Slavic origin |