| 单词 | marekanite | 
| 释义 | marekaniten. Mineralogy.   Perlite, pearlstone. ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > igneous rock > 			[noun]		 > volcanic rocks > lava > vitreous obsidian stone1601 pitchstonea1728 volcanic glass1780 obsidian1794 pearlstone1806 retinite1808 marekanite1818 perlite1833 Pele's hair1844 Pele's tears1930 1818    J. Mawe Descr. Catal. Minerals 		(ed. 3)	 51  				Marekanite, colours, smoke-grey, also dull bluish; occurs in rounded pieces. 1857    J. D. Dana Man. Mineral. 		(new ed.)	 357  				Marekanite is a pearl-gray translucent obsidian from Marekan in Kamschatka. 1920    A. Holmes Nomencl. Petrol. 150  				Marekanite, a variety of perlitic rhyolite-glass from which large perlitic masses of clear glass readily separate. 1993    A. M. Clark Hey's Mineral Index 		(ed. 3)	 436/1  				Marekanite, syn. of pearlstone. This entry has been updated (OED Third Edition, December 2000; most recently modified version published online March 2022). < | 
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