| 单词 | purple quartz |
| 释义 | > as lemmaspurple quartz purple quartz n. Mineralogy (a) = amethyst n. 1a; †(b) U.S. regional = fluorspar n. (obsolete). ΚΠ 1819 W. T. Brande Man. Chem. v. 327 Purple quartz or amethyst is tinged with a little iron and manganese. 1896 Cosmopolitan Feb. 449 The fluor-spar is locally known as ‘purple quartz’. 1943 Science 11 June 531 Milky quartz, rose quartz and purple quartz (amethyst) are useless [for the manufacture of quartz oscillator plates]. 1994 Gleaner (Kingston, Jamaica) 3 Aug. 14/1 Amethyst—a purple quartz is calming. It also sharpens the concious mind. < as lemmas |
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