Further Notes on a Field-Test for Gold

CIM Bulletin1938
IN a previous paper by Douglas and Gillies (1) , a simple field test was given for gold. Later work by the present writers, and by others who have kindly written to us, shows that the test is not as satisfactory as it was hoped. In many cases, the gold mirror is completely obscured by a dense precipitate which, up to the present, it has been found impossible to remove.
Keywords: aqua regia, hydrochloric acid, hydrogen bromide, iodine test, pyridine, Canadian, Fines, Gold, mining, Ore, Ores, test, Tests
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