单词 | alumocalcite |
释义 | alumocalciten. Mineralogy. Now rare. A variety of opal containing lime and alumina as impurities. ΘΚΠ society > occupation and work > materials > raw material > gem or precious stone > opal > [noun] > varieties of girasol1588 oculus mundi1661 eye of the world1730 hydrophane1784 cacholong1791 pitchstone1794 pyrophane1794 semi-opal1794 fire opal1811 sun opal1818 isopyre1827 alumocalcite1832 jasper-opal1843 opal jasper1848 resin opal1850 pitch opal1861 jasp-opal1868 opal-agate1868 harlequin1873 harlequin opal1887 wax-opal1896 potch1897 pinfire1902 moss opal1904 nobby1919 1832 C. U. Shepard Treat. Mineral. 317 (heading) Alumocalcite..milk-white, inclining to blue. 1866 C. Knight Nat. Hist. I. 139 Alumo-calcite..occurs in the clefts of ironstone veins at Eybenstock. 1886 Q. Jrnl. Geol. Soc. 42 432 The material which seems to come nearest to this in composition and properties is the ‘alumo-calcite’ of Kersten, found at Eibenstock, near Rézbánya. 1951 M. L. Wolf Dict. Arts 26 Alumocalcite, in lapidary art, an undesirable variety of opal containing alumina and lime as impurities. This entry has been updated (OED Third Edition, September 2012; most recently modified version published online December 2021). < n.1832 |
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