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Pyrite is harder than gold. While Pyriteâs hardness is 6 to 6.5, gold has hardness around 2 to 3. Pyrite also contains high amount of iron. There is also a big difference in the specific gravity between gold and pyrite.While gold has a specific gravity of 15.6/19.3, pyrite has 5.0.old vs Pyrite. It is easy to make out the difference between Gold and pyrite. They have much difference in their structure, colour, hardness and specific gravity. When comparing gold and pyrite with regard to their colour, both have a metallic lustre but have different yellow tones.
Report Abuse. The mineral pyrite, or iron pyrite, is an iron sulfide with the formula FeS2. This mineral's metallic luster and pale-to-normal, brass-yellow hue have earned it the nickname fool's gold due to its resemblance to gold.