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The mineral pyrite also known as fool’s gold, is an iron sulfide with the chemical formula FeS. It can be found in nature with almost perfect cubic formations like these ones. – beautiful

The mineral pyrite also known as fool's gold, is an iron sulfide with the chemical formula FeS₂. It can be found in nature with almost perfect cubic formations like these ones.

The mineral pyrite also known as fool's gold, is an iron sulfide with the chemical formula FeS₂. It can be found in nature with almost perfect cubic formations like these ones. – radical