| Name: Pyrite |
Origin of name: From the Greek, pyrites lithos, meaning stone which strikes fire. |
Chemical Composition: FeS2 |
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Pyrite is an iron sulphide with a brassy yellow colour and metallic lustre. Because it has often been mistaken for gold, it has come to be known as "fool's gold".
The mineral is common and widely-distributed in a variety of geological environments, but it is generally rejected as an ore in favour of the iron oxides. Pyrite earned its name from the fact that it produces sparks when hit with a hammer. Its most common crystal forms are striated cubes (as shown here) or dodecahedra. |
Crystal system: cubic |
| Class: Sulphides |
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| Hardness: 6 - 6.5 |
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| Cleavage: poor |
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| Colour: brassy yellow |
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| Specific gravity: 5.0-5.02 |