| 单词 | rusty gold |
| 释义 | > as lemmasrusty gold rusty gold n. Mining gold having a surface coating, typically of iron oxide, that makes it resistant to amalgamation. ΚΠ 1859 J. Douglas Let. 4 July in Further Papers Affairs Brit. Columbia (1860) iii. 29 Mr. Sanders laments the great loss of gold arising from careless working and the want of proper means to retain the ‘rusty gold’. 1967 P. R. May West Coast Gold Rushes (ed. 2) 238 With cemented gold a thin coating of iron oxide (‘rusty gold’) often prevented amalgamation. 1999 P. J. Golas in J. Needham Sci. & Civilisation in China V. xiii. 254 Even with this technique..rusty gold particles with films of iron silicates or manganese would not be captured by the mercury. < as lemmas |
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