Vintage Women's Earrings stamped, hallmark 875 with a STAR, USSR period.

In a good condition !

       In the period from 1958 to 1994, silver items produced in the USSR were marked with the mark 875 with a STAR.  These products are in great demand as they are no longer produced.  Also, silver from the times of the USSR always corresponded in composition to its hallmark, while many types of modern imported products contain less precious metal than indicated on the hallmark.

      A value of 875 means that the product of this sample is an alloy, where per 1000 parts by weight of the alloy there are 875 g of pure silver and 125 g of impurity metals.  Possible impurities are copper, platinum, germanium and silicon.  The qualities of a silver alloy, such as color, strength and elasticity, depend on impurities, thus the 875 standard can have different properties.

Thus, the presence of copper strengthens the alloy, platinum changes color (and since platinum is much more expensive than silver, its presence significantly increases the cost of the alloy).  Copper, as the cheapest metal, is used as an impurity most often.  Silver is soft in nature; copper gives it elasticity and strength.

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