| 单词 | quartz |
| 释义 | quartz (once / 1854 pages) n Quartz is a mineral that's usually clear or white, but is sometimes tinted a translucent color. It's common for quartz to be part of other rocks, and often you can see its stripes cutting through smooth beach stones. Quartz is very hard and shiny, and it's also quite common. There are many different types of quartz, and the rarest ones are considered semi-precious gemstones, like citrine and amethyst. This is the quartz that's used to make jewelry. Its chemical name is silicon dioxide, and it has a crystal structure. Quartz comes from the German Quarz, "rock crystal." WORD FAMILYquartz: quartzes USAGE EXAMPLESIf you count smart and quartz models, thousands of watches, with very different functions and purposes, entered the market in 2016. Wall Street Journal(Dec 20, 2016) They met under Schuster’s command on Wednesdays at 2 p.m. in a corner room of the Brain building called Quartz Lake. New York Times(Dec 14, 2016) “Millenial pink”, “not pink pink”, “rose quartz” – call it what you like. The Guardian(Dec 13, 2016) 1n 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 Hypo|Hyper 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 rock crystal, transparent quartza clear quartz used in making electronic and optical equipment cairngorm, smoky quartza smoky yellow or brown quartz amethysta transparent purple variety of quartz; used as a gemstone calcedony, chalcedonya milky or greyish translucent to transparent quartz citrinesemiprecious yellow quartz resembling topaz rose quartza translucent rose-red variety of quartz used for ornaments aventurine, sunstonea translucent quartz spangled with bits of mica or other minerals common topaz, false topaz, topaza yellow quartz rhinestonean imitation diamond made from rock crystal or glass or paste agatean impure form of quartz consisting of banded chalcedony; used as a gemstone and for making mortars and pestles bloodstone, heliotropegreen chalcedony with red spots that resemble blood carnelian, corneliana translucent red or orange variety of chalcedony chrysoprasea green variety of chalcedony valued as a gemstone goldstoneaventurine spangled densely with fine gold-colored particles onyxa chalcedony with alternating black and white bands; used in making cameos plasmaa green slightly translucent variety of chalcedony used as a gemstone sard, sardine, sardiusa deep orange-red variety of chalcedony mineral solid homogeneous inorganic substances occurring in nature having a definite chemical composition 2n colorless glass made of almost pure silica Syn|Hyper crystal, lechatelierite, quartz glass, vitreous silica natural glass magma of any composition that cooled very rapidly |
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