| 单词 | natural glass |
| 例句 | This natural glass, in fiery shades of brown, black or blood red, resulted from flowing volcanic lava millions of years ago. Special Report: A Cut Above: Jewelry: Jewelers Attracted to Mysterious and Ancient Obsidian 2011-03-17T14:30:44Z Tektites are pieces of natural glass that form when a meteorite strikes Earth and launches bits of molten rock into the air, where they solidify and rain down upon our planet. Catastrophe by Mail 2019-08-09T04:00:00Z The plutonic or intrusive rocks, which have been forced into the crust and have consolidated there, present a wide range of texture from the most coarse-grained granites to the most perfect natural glass. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" 2011-09-19T02:00:10.473Z Turreted on all four corners, constructed of material which looked like blocks of natural glass, the fairylike structure was crowned by a gigantic tower of something which resembled obsidian. Astounding Stories of Super-Science, December 1930 The substance is silica, a natural glass; and the prevailing shape is a six-sided prism capped at either end by little pyramids modeled with consummate grace. Natural Law in the Spiritual World On account of its peculiar formation, this crag of natural glass had several times attracted my attention, and on any other occasion I would have been curious enough to give it closer inspection. The Black Wolf Pack Crystals of opaque quartz, adorned with limpid drops of natural glass suspended to the roof like lusters, seemed to take fire as we passed beneath them. A Journey to the Centre of the Earth On the one hand, some are completely vitreous, like obsidian, which is a natural glass. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" 2011-09-19T02:00:10.473Z |
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