|
quartz 音標拼音: [kw'ɔrts] n. 石英 石英 quartz水晶; 石英 quartz石英 quartz n 1: colorless glass made of almost pure silica [ synonym: { quartz glass}, { quartz}, { vitreous silica}, { lechatelierite}, { crystal}] 2: 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 impuritiesQuartz \ Quartz\, n. [ G. quarz.] ( Min.) A form of silica, or silicon dioxide ({ SiO2}), occurring in hexagonal crystals, which are commonly colorless and transparent, but sometimes also yellow, brown, purple, green, and of other colors; also in cryptocrystalline massive forms varying in color and degree of transparency, being sometimes opaque. [ 1913 Webster] Note: The crystalline varieties include: amethyst, violet; citrine and false topaz, pale yellow; rock crystal, transparent and colorless or nearly so; rose quartz, rosecolored; smoky quartz, smoky brown. The chief crypto- crystalline varieties are: agate, a chalcedony in layers or clouded with different colors, including the onyx and sardonyx; carnelian and sard, red or flesh- colored chalcedony; chalcedony, nearly white, and waxy in luster; chrysoprase, an apple- green chalcedony; flint, hornstone, basanite, or touchstone, brown to black in color and compact in texture; heliotrope, green dotted with red; jasper, opaque, red yellow, or brown, colored by iron or ferruginous clay; prase, translucent and dull leek- green. Quartz is an essential constituent of granite, and abounds in rocks of all ages. It forms the rocks quartzite ( quartz rock) and sandstone, and makes most of the sand of the seashore. [ 1913 Webster] |
安裝中文字典英文字典查詢工具!
中文字典英文字典工具:
英文字典中文字典相關資料:
|