Very effective cleaning cloth to be used on most precious metals and finishes. Self containing two step process with two treated inner cloth to be used to remove tarnish and two outer cloth to be used for buffing and shining. Great investment to keep your jewelry looking as good as the day you first got it. Caution: Do not use on 24 karat gold, ivory, pearls, opals, coral, lapis, malachite and other soft or porous stones.