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1
A zinc sulfide mineral (ZnS) with dispersive fire exceeding that of diamond, faceted as a rare collector's gem; notable transparent deposits occur in Spain and Mexico.
2
Iron disulfide (FeS₂) with a bright metallic luster, used in jewelry since antiquity and especially fashionable as small faceted stones set in silver during the Art Deco period.
3
Senator Fumaroles are two steam and hydrogen sulfide vents in Churchill County, Nevada, part of the Dixie Valley geothermal area.
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