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a plant to recover micro gold from clay and silica sands

a plant to recover micro gold from clay and silica sands

Nov 23, 2016 Fire assaying has been practiced since ancient times and has proven to be very reliable in the determination of precious metals. References to fire assaying are found in the old testament of the Bible and artifacts in past civilizations’ ruins. Assaying began to appear in French and English literature in the 12th century and from there spread to the rest of Europe shortly after.

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