Editing Eclogite (section)

{{Short description|Metamorphic rock formed under high pressure}}
[[Image:Eclogite Norway.jpg|thumb|300px|right|Eclogite piece 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 {{convert|23|mm}} coin added for scale.]]

'''Eclogite''' ({{IPAc-en|pron|ˈ|ɛ|k|l|ə|dʒ|aɪ|t}}) is a [[metamorphic rock]] containing [[garnet]] ([[Garnet#Almandine|almandine]]-[[Garnet#Pyrope|pyrope]]) hosted in a [[Matrix (geology)|matrix]] of [[sodium]]-rich [[pyroxene]] ([[omphacite]]). Accessory minerals include [[kyanite]], [[rutile]], [[quartz]], [[lawsonite]], [[coesite]], [[amphibole]], [[phengite]], [[paragonite]], [[zoisite]], [[Dolomite (mineral)|dolomite]], [[corundum]] and, rarely, [[diamond]]. The chemistry of primary and accessory minerals is used to classify three types of eclogite (A, B, and C). The broad range of eclogitic compositions has led to a longstanding debate on the origin of eclogite [[xenolith]]s as [[subducted]], altered [[oceanic crust]].

The name ''eclogite'' is derived from the [[Ancient Greek]] word for 'choice' ({{Wikt-lang|grc|εκλογή}}, {{grc-transl|εκλογή}}), meaning 'chosen rock' on account of its perceived beauty. It was first named by [[René Just Haüy]] in 1822 in the second edition of his work ''Traité de minéralogie''.<ref>{{cite web|url=https://www.ruhr-uni-bochum.de/eclogite/history.html|title=Eclogite History|author=International Eclogite Conference|access-date=25 May 2024}}</ref>