Liver of Sulphur Use Liver of Sulphur to oxidize your silver pieces, which turns the silver black, then Polished. The places you can't buff up stay black.
Brand
Silver Clay
WARNING: This product can expose you to chemicals including Silica, crystalline (airborne particles of respirable size), which are known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.