The Hagerty Sonic Jewelry Cleaner is safe for use on gold, silver, porous stones (such as pearls, coral, onyx and turquoise) and all non-porous stones. Porous stones should not be immersed for more than 3-4 minutes.
Simply add concentrate and water to tank, place jewelry in basket, and close lid to clean. Remove jewelry, rinse, and buff dry with a soft cloth.
Hagerty products are endorsed and certified Kosher by the Union of Orthodox Jewish Congregations of America