Iron pyrites

Iron pyrites

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Credit: SHEILA TERRY/SCIENCE PHOTO LIBRARY

Caption: Iron pyrites. Nugget of iron pyrites, a crystalline form of iron sulphide (FeS2). It is pale brass-yellow in colour with a metallic lustre, which explain its common name of fool's gold. The crystals are often cubic or octahedral in shape. It is the most abundant sulphide in the Earth's crust and can be found in most environments. It is used as a source of sulphur and sulphuric acid for industry, and is made into jewellery under the name 'marcasite'.

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Keywords: crystal, crystalline, crystals, fool's gold, geological, geology, golden, iron pyrites, iron sulphide, lump, lustre, marcasite, metal, metallic, mineral, minerals, nugget, pyrite, shiny, sulphides

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