Peridotite is an ultramafic (silica-poor, magnesium-rich) intrusive rock. It is coarse-grained and pale to dark green and is composed of >90 % mafic (ferromagnesian) minerals: typically olivine, orthopyroxene, and clinopyroxene. Minor phases include plagioclase, spinel or garnet, amphibole or biotite, and Fe-Cr-Ti oxides. Peridotite is the dominant component of the upper mantle of the Earth and other planets and is thus the most common rock in the Solar System. Peridotite is also found as main component of some shergottites, one of the classes of Martian SNC meteorites.