Establishments primarily engaged in mining gold ores from lode deposits or in the recovery of gold from placer deposits by any method. In addition to ore dressing methods such as crushing, grinding, gravity concentration, and froth flotation, this industry includes amalgamation, cyanidation, and the production of bullion at the mine, mill, or dredge site. …
Examples: Bullion, gold: produced at mine, mill, or dredge site, Calaverite mining, Lode gold mining, Placer gold mining,
