JEWELER'S SECRET® cleans and restores that "like new" look and sparkle to diamonds, precious, and semi-precious stones. It can clean gold, silver, platinum, and costume jewelry. Most ordinary "dip" jewelry cleaners require you to soak your jewelry overnight; after just a couple of cleanings you are soaking your jewelry with all the dirt, build-up, and grime from previous cleanings. In addition these "standard" formulas use ammonia-based cleaning agents that over time are harmful for your jewelry.