A large number of goldsmiths across India has taken to adulterating the precious metal with iridium and ruthenium (members of the lustrous platinum family)—up to 6%—and are getting away with it unless the gold is subjected to extensive purity tests.
These metals do not replace silver and copper that are added to all gold jewellery to make the soft yellow metal hard. “Iridium and ruthenium can be camouflaged as gold,’’
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