Chromite is a black sub-metallic mineral consisting of oxide of chromium and iron. It is slightly magnetic and the only ore of chromium. A common constituent of peridotite rocks and the serpentines derived from them. Also associated with corundum. One of the first minerals to separate from a cooling magma. Chromium is widely used in metal plating and in stainless steel. It has the formulae FeCr2O4 and a relative hardness of 6. Research Chromite
Peridotite is an intrusive igneous rock thought to be one of the major components of the Earth's mantle. Peridotite is generally dark coloured and formed from dense, heavy minerals, of which more than 40 percent are olivine. Research Peridotite
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Matt and Leela Probert
Abbreviations
Research Chromite
