02.EA.20 - Metal sulfide, M: S <= 1:2 with Cu, Ag, Au (Q162051)

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classification of minerals from the Strunz-Nickel classification system version 10
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02.EA.20 - Metal sulfide, M: S <= 1:2 with Cu, Ag, Au
classification of minerals from the Strunz-Nickel classification system version 10

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