Professional Gem and Jewelry Cleaner, Three 8 oz. Kits, with Cleaning Solution, Brush and Basket, for Your Precious Jewelry Including Gold, Silver and Platinum, by BlackHillsGoldSource NON-TOXIC AND MADE IN THE USA to the highest quality standards for use as a safe home jewelry cleaner concentrate to remove dirt and restore shine. 100% Satisfaction Guaranteed or Your Money Back INCLUDES THREE CONVENIENT KITS each with cup, basket, jewelry cleaning solution and jewelry cleaner brush. Can be used as is or with all types of cleaning machines including ultrasonic jewelry cleaners. EASY TO USE - Simply drop your jewelry into the holding basket, recap and agitate for 3 minutes, remove and rinse for a brilliant shine. If necessary, use the jewelry cleaner brush included with each kit to remove loosened deposits. Everything fits in the self-contained jar and seals tight with cap. SPECIALLY FORMULATED for cleaning precious metals such as gold, silver and platinum and gems such as diamond, ruby, topaz, sapphire, amethyst, aquamarine, garnet, peridot and other non-porous jewelry. Do not use for cleaning porous gems such as amber, jade, opals, pearls or turquoise, etc. A NOTE ABOUT TARNISH - Silver or brass Tarnish is a chemical reaction that requires another chemical reaction to properly remove it. Our Gem & Jewelry Cleaner does a great job of removing built-up dirt and grime from jewelry, and keeping it grime-free with regular use. But to remove sterling silver Tarnish we suggest our jewelry polishing cloths because they have tarnish cleaning compounds and inhibitors impregnated in the cloth.