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PLATINUM
xx METAL & METALWORKING
Platinum for the jewelry maker. How to bend, solder, finish and work with platinum. JEWELRY MAKING, GEMS & MINERALS #541 Nov 1982 pg. 16
Discover and recover the noble metals. Using nitrate leaching to extract gold, silver and the platinum group from ordinary unyielding ores. LAPIDARY JOURNAL Sep 1985 (v.39#6) pg. 55
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