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why has my malachite pendant lost its luster and has turned dark

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asked Jan 6, 2016 by marlene (120 points)

1 Answer

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Malachite is very stable, the only thing I've found for darkening is exposure to hydrogen sulfide in pollutants or when used in substances as a colorant it may darken as the oil base darkens.
answered Jan 6, 2016 by Weasel (52,070 points)