omphacite

mineral

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July 1, 2026

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Omphacite is a mineral composed of a grass-green pyroxene found in eclogite rocks. Pyroxenes are a group of rock-forming silicate minerals that are abundant in igneous and metamorphic rocks. They are characterized by their chemical composition, which can be represented by the general formula XYZ₂O₆, and crystallize in either the orthorhombic or monoclinic systems. Omphacite specifically occurs in high-pressure, high-temperature rocks known as eclogites, which are indicative of deep metamorphic conditions.12

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pyroxene
Metamorphic rocks
Omphacite is restricted in occurrence to the high-pressure and high-temperature rocks called eclogites. Eclogites represent the most deep-seated conditions of metamorphism and are characterized by an assemblage of omphacite and magnesium-rich pyrope garnet. Omphacite-bearing eclogite nodules are associated with peridotites in the kimberlite pipes of…
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Omphacite is restricted in occurrence to the high-pressure and high-temperature rocks called eclogites. Eclogites represent the most deep-seated conditions of metamorphism and are characterized by an assemblage of omphacite and magnesium-rich pyrope garnet. Omphacite-bearing eclogite nodules are associated with peridotites in the kimberlite pipes of…
Read More