The safest way to clean a colored stone is to wash it in lukewarm water using a mild liquid soap. Then dry it with a soft, lint-free cloth. Once in a while have it professionally clean by jeweler. With green amethyst, strong heat may change or fade its color, so don't leave this gem sitting on a sunning window or wear it to the beach. Avoid acids solutions as well as everyday products such as perfumes and lotions.
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