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Why does silver darken over time?

The fact that a silver jewel loses its initial brightness and becomes blackish, is something completely natural, you should not be alarmed or think that the piece is of lower quality, since this happens even to the pieces of greater purity .This is due to a process similar to oxidation called sulphidation. Although silver is a noble metal that does not oxidize, meaning that it does not react with the oxygen in the air, it does with hydrogen sulfide (H2S) equally present in the environment.Factors that accelerate the process:You will see that in summer time your silver pieces need extra care, since they are more likely to react and grow dark. Sun and heat speed up the process, because the...

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