| 单词 | blue ground |
| 释义 | > as lemmasblue ground blue ground n. Mining (originally South African) the brecciated igneous rock, typically dark greyish-blue, in which diamonds may be found; = kimberlite n.; cf. yellow ground n. at yellow adj. and n. Compounds 2d(b). ΘΚΠ the world > the earth > structure of the earth > constituent materials > earth or soil > kind of earth or soil > [noun] > mineral soil > blue earth blue clay1577 blue1873 blue ground1881 blue earth1883 1881 Truth 7 July 29/1 (advt.) The Vendors have devoted the whole of their energy since they acquired the various Claims to work down to what is technically known as ‘blue ground’. 1911 Daily Chron. 25 Mar. 3/2 Of very great rarity is a piece of ‘blue ground’ with a diamond embedded in it... The ‘blue ground’..is..not uncommonly black or brown. 1954 J. F. Kirkaldy Gen. Princ. Geol. x. 124 On the average the yield of diamonds is about one fifteenth million part of the quantity of blue ground mined. 2006 Oroville (Calif.) Mercury Reg. (Nexis) 28 Dec. Miners at the shaft in Oroville broke into a chunk of blue ground with flickers of what appeared to be diamonds. < as lemmas |
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