Omphacite - Wikipedia
Omphacite is a member of the clinopyroxene group of silicate minerals with formula: (Ca, Na) (Mg, Fe 2+, Al) Si 2 O 6. It is a variably deep to pale green or nearly colorless variety of clinopyroxene. It normally appears in eclogite, which is the …
Omphacite - ALEX STREKEISEN
Omphacite is a clinopyroxene solid solution of jadeite (25%-75%), augite (25%-75%), and aegirine (0%-25%). It is a major mineral component of eclogite along with pyrope garnet and also occurs in blueschist facies and UHP (ultrahigh-pressure) metamorphic rocks.
Omphacite Jade Gemstone Information - GemSelect
Omphacite jade is a pyroxene mineral with a chemical formula somewhere between that of jadeite and augite: (Ca,Na)(Mg,Fe2+,Al)Si2O6. The term 'omphacite jade' can be applied to green varieties of omphacite. It has a brittle tenacity and exhibits …
The Mineral omphacite - The Mineral and Gemstone Kingdom
Omphacite is a rare member of the pyroxene group. It is intermediary in chemical composition between Augite and Jadeite. It is one of the primary minerals that forms eclogite deposits, which is a dense, course grained rock formed at extremely high pressures. It is occasionally associated with Diamond in Diamond deposits.
Occurrence: A major constituent of eclogite, commonly in kimberlite pipes; from some ophiolites and glaucophane-bearing blueschist facies rocks. Association: Garnet, quartz, kyanite, corundum (eclogite); \hornblende," scapolite, epidote, glaucophane (blueschists). Distribution: A …
Omphacite Mineral Data
Major constituent of eclogite, commonly in kimberlite pipes; from some ophiolites and glaucophane-bearing blueschist facies rocks. Tiburon Pininsula, Marin County, and Sonoma County, California, USA. Link to MinDat.org Location Data. From the Greek for "unripe grapes", in allusion to its green color.
40 Facts About Omphacite
2024年12月14日 · Omphacite is a member of the pyroxene group, known for its unique crystal structure and vibrant color. It plays a crucial role in the formation of eclogite, a rock that tells stories of ancient geological processes.
Omphacite - Clark Science Center
Commonly found in rocks that formed in high-pressure conditions, such as eclogite, a high-pressure metamorphic/igneous rock. It is less commonly found in alpine metamorphic belts in blue schist, metagraywacke, and can also be found in granulites. Photomicrograph of a mostly omphacite in plane polarized light.
Omphacite - an overview | ScienceDirect Topics
Omphacite is a green calcalkali pyroxene mineral composed of jadeite, diopside, and hedenbergite components. It is colorless to green under the microscope and is typically found in eclogite facies rocks formed at high pressure in various geodynamic settings.
Omphacite
Dark green omphacite crystals with brownish-green epidote-group mineral (after chemical dissolution of calcite). Self collected in 1975. Collection and photo: Angelo Brambilla. Omphacite grading from light to dark green. Photographed by and in the collection of Douglas Merson.
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