Tarn-X 12 oz. Tarnish Remover removes tarnish from sterling, silver plate, platinum, copper, gold, and diamonds instantly without harming the item. It is a liquid tarnish remover that is easy to use and does not require any special tools or equipment. Simply apply the tarnish remover to the affected area and rub it in with a soft cloth. The tarnish will disappear instantly. Tarn-X Tarnish Remover is safe for use on all types of jewelry, including gold, silver, platinum, and diamonds. It is also safe for use on copper, brass, and other metals. It comes in a 12 oz. bottle.