The basics Make your jewelry sparkle with the professional power of sonic cleaning. The benefits Includes three Hagerty Sonic Jewel Clean concentrate packets, a brush, and a basket for easy drip-drying.  The uses 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. The pro tip Porous stones should not be immersed for more than 3-4 minutes.