Tarn-X PRO Tarnish Remover will clean sterling silver, silver plate, platinum, copper, gold and even diamonds.  This non-flammable tarnish remover is perfect for cleaning copper in factories and mechanic shops.  Jewelry designers will also find this product great for final cleanings before the jewelry is sold or displayed.  Do not use on stainless steel, chrome, pewter, aluminum, brass, artificially oxidized silver, lacquered surfaces, pearls or porous stones.  Avoid spilling on laminates like Formica, countertops and synthetic surfaces.