Sterling Silver
Sterling silver is an alloy of 92.5% silver and 7.5% other metals. Compared to pure silver it is harder and thus very suitable for jewelry production.
There are other silver compounds, like Britannian silver or Mexican silver. Here the pure silver amount is higher than in Sterling silver.
Silver and tarnish
The lower amount of pure silver, the bigger the problems with corrosion. Pure silver doesn't react with oxygen but as it isn't hard enough our jewellery doesn't consist of pure silver so the rings, earrings and other jewelry will turn black or dark bluish.
There are many products on the market to remove this and restore the grey and shiny metal look.
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