omphacite


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omphacite

(ˈɒmfəˌsaɪt)
n
(Minerals) a green, foliated mineral
References in periodicals archive ?
Eclogites are fine-grained rocks consisting of garnet porphyroblasts set in a matrix of omphacite (25%), amphibole (hornblende or barroisite) (20%), plagioclase and zoisite; rutile often rimmed by titanite occurs as the main accessory mineral phase, phengite is quite rare whereas quartz is nearly absent.
Claire Mitchell FGA DGA, London, for a reconstituted malachite/azurite, two reconstituted turquoises, two sugilite simulants, and rough and cabochon-cut samples of omphacite jade from Val Pellice-Alpi Cozie, Piemonte-Nord, Italy.
Being an etymologist she searches for herself in dictionaries and relishes the "lovely words: pyrolusite, ignimbrite, omphacite, uvarovite, glaucophane, schist, shale, gneiss, tuff.
He addressed this problem by preparing mineral separates of two garnets and an omphacite, since no suitable garnet and omphacite specimens were available.
Chuck Trantham recalls that Jack collected nissonite at the type locality in San Benito County, California, with Charles Chesterman, pumpellyite and omphacite near Cazadero, California, with George Switzer and Al McGuinness, and parahopeite at Broken Hill, Zambia, with Al McGuinness and Luis Leite.
The presence of eclogitic omphacite in specific samples appears to differentiate these trains from the one observed further north (G9-ILM File-Axe Lake train).
Dr Edward (Shang-i) Liu (The Hong Kong Institute of Gemmology) described several types of fei cui jade, consisting of various amounts of jadeite [+ or -] omphacite and kosmochlor.