I bought this and it came faster than I expected, always a plus. I started using it right away and the white inner cloth turned almost black from all the build up my my jewlrey. I love this cloth1!I haven't tried it on gold, but it works great on silver, especially rings, necklaces are a little trickier to get in the nooks.

The directions say
"Rub surface gently with inner treated cloth to loosen tarnish. Buff surface with outer cloth to instantly obtain a brillian shine. For heavily tarnished metal, lightly moisten the surface to be cleaned prior to polishing.
Caution: Do not use on 24 karat gold, ivory, pearls, opals, ciral, lapis, malachite and other soft or porous stones."