Refined in the Fire

Twenty-four karat gold is 100 percent gold with no impurities. But that percentage is difficult to achieve. Refiners most commonly use one of two methods for the purification process. The Miller method is the quickest and least expensive, but the resulting gold is only about 99.95 percent pure. The Wohlwill process takes a little more time and costs more, but the gold produced is 99.99 percent pure. In Bible times, refiners used fire as a gold purifier. Fire caused impurities to rise to the surf

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