I have wondered the same thing. How can silver and pearl jewelry be cleaned? Perhaps the answer is to treat the silver before it's paired with pearls.I have seen a product invented by a housewife on one of the shopping networks. I have also seen her product advertised in magazines but I have never used it.

Here is a link.

http://www.maasinc.com/about_us.asp

also there is a different product which is a cloth for polishing silver

http://www.wehug.com/sunshine-polish-cloth.html