There are impurities that naturally occur in silver at the molecular level. These impurities consist of other metals - usually copper, but traces of other metals can also be found. These trace impurities are insignificant, and would be too costly to remove - so .999 silver is considered pure.
#jewelleryfacts365 235/365 Silver fact
Thursday, September 22, 2016
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jewellery facts,
silver facts
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