英语词汇“semi-opal”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	semi-opal
释义	semi-ˈopal [transl. G. halbopal (Werner, 1788).] An inferior variety of opal harder and more opaque than common opal. 1794Kirwan Elem. Min. (ed. 2) I. 290 Semi Opal..much resembles flint.1857Dana Man. Min. (1862) 139 Common opal has the hardness of opal and is easily scratched by quartz, a character which distinguishes it from some silicious stones often called semi-opal.
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