Pyrite is made of iron and sulfur and is the compound iron
sulfide with the chemical formula FeS2. It is not a mixture of iron
and sulfur. The iron and sulfur are chemically combined to form a
compound.
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Iron sulfates contain iron, sulfur and oxygen.
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Iron is silver while sulfur is yellow, Iron is magnetic while
sulfur is not, and Iron looks like dirt and sulfur looks like
yellow powdered sugar