Augite

High-Ca clinopyroxene, (Ca,Mg,Fe)SiO3, that occurs in many igneous rocks, particularly those of basaltic composition. In order to be considered augite, the clinopyroxene must contain 20 to 45 mol % of calcium (Wo20 – 45).

An important and unique Martian meteorite is NWA 8159, that has been classified as an augite basalt.

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