Eclogite
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Eclogite is a metamorphic rock containing garnet hosted in a matrix of sodium-rich pyroxene. Accessory minerals include kyanite, rutile, quartz, lawsonite, coesite, amphibole, phengite, paragonite, zo
Eclogite from Norway with a garnet (red) and omphacite (greyish-green) groundmass. The sky-blue crystals are kyanite. Minor white quartz is present, presumably from the recrystallization of coesite. A few gold-white phengite patches can be seen at the top. A 23 millimetres (0.91 in) coin added for scale.
Photomicrograph of a thin section of eclogite from Turkey. Green omphacite (+ late chlorite) + pink garnet + blue glaucophane + colorless phengite.
Eclogite
Eclogite from Almenning, Norway. The red-brown mineral is garnet, green omphacite and white quartz.
Omphacite
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Omphacite is a member of the clinopyroxene group of silicate minerals with formula: Si2O6. It is a variably deep to pale green or nearly colorless variety of clinopyroxene. It normally appears in eclo
Eclogite
…Eclogite ( ) is a metamorphic rock containing garnet (almandine-pyrope) hosted in a matrix of sodium-rich pyroxene (omphacite). Accessory minerals include kyanite, rutile, quartz, lawsonite, coesite, amphibole, phengite, paragonite, zoisite, dolomite, corundum and, rarely…
Phase diagram of slab crust in the Earth's upper mantle from 200 to 500 km depth. Omphacite general dissolves into garnet as depth increases. Omphacite can stable up to ~500 km depth.