silver discolors easily and the reason is sulfur. sulfur occurs in many contexts: in the air, on skin, in the kitchen, painted surfaces, fabrics, plastics, cigarette smoke, fossil fuels, rubber bands, etc.. it's commonly said that silver oxidizes. some people excrete sulfur on the skin.humidity is very important for how fast silver sulphide is growing. the higher the relative humidity in the air, the faster the formation of sulfide. try not to store your silver jewelry in the bathroom.
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