gold in quartz february 2016 (vol. 85, no. 06) icmj's
Crushingtheorecan free thegoldand allow recovery by gravity-based methods. In fact it’s very common that thegoldin hard rockoreswill range in the 30- to 200-mesh size range with most of thegoldin the lower end of that range. The tried and true method for testing theseoresin the field is handcrushing…
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