The Gem and Jewelry Cleaner is a non-toxic cleaner formulated for the cleaning of gold, platinum, diamond, ruby, sapphire, amethyst, aquamarine and other non-porous gem jewelry. The 100% cotton polishing cloth maintains the shine of silver, gold, and platinum jewelry. Do not use either on emeralds, pearl or other porous gemstones such as jade, opal or lapis.... » read more