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melting gold and black sand

Jan 20 2019 · 3 put dry black sand on a sheet of clean steel 4 beat the black sand with a small hammer 5 the black sand grains shatter 6 any gold is released 7 any gold is either tiny and visible only with a x40 to x100 stereozoom microscope or is big enough to be beaten flat and rendered large enough to be seen by eye in bright light

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