| 单词 | hacked quartz |
| 释义 | > as lemmashacked quartz hacked quartz n. Mineralogy (now rare) a variety of quartz, believed (in later use) to be a pseudomorph after baryte, exhibiting nicks and fissures, as if it had been hacked at with a sharp implement. ΚΠ 1786 Catal. Portland Mus. (Skinner & Co.) 70 A specimen of hacked Quartz. 1886 Nature 25 Mar. 486/2 This form of calcite..gives rise to ‘hacked’ quartz, when silica has coagulated or crystallised over a mass of such thin crystals, and then these latter have been subsequently dissolved out. 1911 Papers & Proc. Royal Soc. Tasmania 1910 149 A peculiar variety known as ‘hacked quartz’ occurs at several of the East Coast alluvial tin workings. 1946 Mineral. Mag. 27 151 The crystals either project from, or lie flat on, thin crusts of minutely crystallized green pyromorphite, which invests baryte, small bipyramidal crystals of quartz, or hacked quartz from which baryte has been leached. < as lemmas |
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