Gem and Jewelry Cleaner Concentrate is a non-toxic concentrated liquid that mixes with water to clean jewelry in all types of jewelry cleaning machines and ultrasonic jewelry cleaning machines. This non-toxic formula is for use in all types of jewelry cleaning machines and is specially formulated for the cleaning and care of gold, silver, platinum, diamonds, ruby, sapphire, topaz, amethyst, garnet, peridot and other non-porous precious and semi-precious gem jewelry.