I bought this necklace on May 11, 2011. I wear it frequently with a silver cross. It is July 31st and the chain now looks brown. I don't know much about silver, as I normally wear gold jewelry, but the cross I bought has such sentimental value that I wanted a chain to wear it on from day to day. The cross, also silver, is fine. I allow for the fact that it may be something I did, but then how come the chain turned but not the cross? I'm very disappointed.