| 单词 | natural glass |
| 释义 | > as lemmasnatural glass natural glass n. any of various minerals (such as obsidian and tachylite) that resemble glass in their appearance and amorphous structure, having solidified from magma too quickly to crystallize. 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 1779 W. Hamilton Let. 1 Oct. in Philos. Trans. (Royal Soc.) (1780) 70 80 The phenomenon of the natural spun-glass, which fell at Ottaiano with the [volcanic] ashes..was clearly explained to me.] 1853 Spectator 22 Jan. 84/2 The finest particles of gold-dust are found in the sands of rivers;..it is found infinitesimally disseminated in the veins of natural glass, (quartz rock). 1894 Thinker Mag. 5 342 Phenomena like the devitrification of natural glasses oscillate from paramorphic to pseudomorphic. 1942 Chem. Abstr. 36 6452 (heading) Transformation of natural glasses into crystalline rocks by subjection to high gas and water-vapor pressures. 1992 A. Bell tr. M. Toussaint-Samat Hist. Food vi. 130 The use of obsidian (natural glass) for vessels and for seals, as well as similarities in the so-called cardial decoration of pottery.., are all evidence of cultural cross-currents. < as lemmas |
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