| 单词 | pearl opal |
| 释义 | > as lemmaspearl opal pearl opal n. Mineralogy a pale whitish variety of opal; = cacholong n. ΘΚΠ the world > the earth > minerals > types of mineral > silicates > tectosilicate > [noun] > quartz > amorphous quartz or opal > others girasol1588 oculus mundi1661 hydrophane1784 cacholong1791 pitchstone1794 pyrophane1794 semi-opal1794 wood-stone1794 fire opal1811 wood-opal1816 sun opal1818 isopyre1827 jasper-opal1843 opal jasper1848 resin opal1850 natural glass1853 pitch opal1861 vitrite1866 jasp-opal1868 opal-agate1868 pearl opal1872 harlequin1873 harlequin opal1887 wax-opal1896 potch1897 moss opal1904 nobby1919 1872 Chambers's Encycl. II. 480/2 It is sometimes called Pearl Opal, or Mother-of-Pearl Opal. It is generally of a milk-white colour, rarely with a yellowish or reddish tinge, opaque and dull or pearly and shining, and has a flat conchoidal fracture. 1951 M. L. Wolf Dict. Arts 507/2 Pearl opal, in lapidary art, same as cacholong (q.v.); an opaque opal with a bluish-white, porcelain white, pale yellow or red color. < as lemmas |
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