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identifying gold in stone

Oct 25, 2016 Calaverite is a bronze-yellow gold telluride, usually containing a little silver, occurring in Western Australia and in certain mines in California and Colorado. One analysis gave tellurium 55.5 per cent., gold 44.5 per cent., corresponding to the formula AuTe2. Another analysis from Kalgoorlie showed gold 41.76 per cent., silver 0.80 per cent ...

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