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This unique non-toxic solution formulated for the cleaning of delicate gems and jewelry can be used on gold, platinum, diamond, ruby, sapphire, amethyst, aquamarine, garnet, topaz, peridot, emerald, jade, opal, lapis, and other gems. Do not use on pearls. The 100% cotton polishing cloth maintains the shine of silver, gold, and platinum metals, not for use on gems.