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Copper(II) sulfate Crystal Iron(II) sulfate Chalcanthite, Nickel Sulfate, gemstone, blue, electric Blue png -
Copper(II) sulfate Crystal structure Iron(II) sulfate Primitive cell, crystal, miscellaneous, flag, triangle png
Chalcanthite Copper(II) sulfate Gemstone Mineral, gemstone, gemstone, blue, diamond png
Sapphire Chalcanthite Gemstone Blue Spinel, sapphire, purple, gemstone, blue png
Cobalt blue Gemstone Diamond Opal, dimond, purple, gemstone, blue png
