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process for extration purifiion manufactural in gold

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process for extration purifiion manufactural in gold

By 2000 bc theprocessofpurifying gold-silveralloys with salt to remove the silver was developed. The mining of alluvial deposits and, later, lode or vein deposits required crushing prior togold extraction, and this consumed immense amounts of manpower. By ad 100, up to 40,000 slaves were employed ingold miningin Spain. The advent of Christianity somewhat tempered the demand forgold…

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