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- Pegmatite abstract "A pegmatite is a holocrystalline, intrusive igneous rock composed of interlocking phaneritic crystals usually larger than 2.5 cm in size; such rocks are referred to as pegmatitic. Most pegmatites are composed of quartz, feldspar and mica, having a similar basic composition as granite. Rarer intermediate composition and mafic pegmatites containing amphibole, Ca-plagioclase feldspar, pyroxene, feldspathoids and other unusual minerals are known, found in recrystallised zones and apophyses associated with large layered intrusions.Crystal size is the most striking feature of pegmatites, with crystals usually over 5 cm in size. Individual crystals over 10 metres across have been found, and many of the world's largest crystals were found within pegmatites. These include, spodumene, microcline, beryl, and tourmaline.[citation needed]Similarly, crystal texture and form within pegmatitic rock may be taken to extreme size and perfection. Feldspar within a pegmatite may display exaggerated and perfect twinning, exsolution lamellae, and when affected by hydrous crystallization, macroscale graphic texture is known, with feldspar and quartz intergrown. Perthite feldspar within a pegmatite often shows gigantic perthitic texture visible to the naked eye.".
- Pegmatite thumbnail Alkaline_pegmatite.jpg?width=300.
- Pegmatite wikiPageExternalLink pegmatopia.ou.edu.
- Pegmatite wikiPageID "38306".
- Pegmatite wikiPageRevisionID "605464626".
- Pegmatite hasPhotoCollection Pegmatite.
- Pegmatite subject Category:Economic_geology.
- Pegmatite subject Category:Igneous_rocks.
- Pegmatite subject Category:Phaneritic_rocks.
- Pegmatite comment "A pegmatite is a holocrystalline, intrusive igneous rock composed of interlocking phaneritic crystals usually larger than 2.5 cm in size; such rocks are referred to as pegmatitic. Most pegmatites are composed of quartz, feldspar and mica, having a similar basic composition as granite.".
- Pegmatite label "Pegmatiet".
- Pegmatite label "Pegmatit".
- Pegmatite label "Pegmatita".
- Pegmatite label "Pegmatite".
- Pegmatite label "Pegmatite".
- Pegmatite label "Pegmatite".
- Pegmatite label "Pegmatito".
- Pegmatite label "Pegmatyt".
- Pegmatite label "Пегматит".
- Pegmatite label "ペグマタイト".
- Pegmatite label "偉晶岩".
- Pegmatite sameAs Pegmatit.
- Pegmatite sameAs Pegmatit.
- Pegmatite sameAs Πηγματίτης.
- Pegmatite sameAs Pegmatita.
- Pegmatite sameAs Pegmatita.
- Pegmatite sameAs Pegmatite.
- Pegmatite sameAs Pegmatite.
- Pegmatite sameAs ペグマタイト.
- Pegmatite sameAs 페그마타이트.
- Pegmatite sameAs Pegmatiet.
- Pegmatite sameAs Pegmatyt.
- Pegmatite sameAs Pegmatito.
- Pegmatite sameAs m.09k1p.
- Pegmatite sameAs Q105630.
- Pegmatite sameAs Q105630.
- Pegmatite wasDerivedFrom Pegmatite?oldid=605464626.
- Pegmatite depiction Alkaline_pegmatite.jpg.
- Pegmatite isPrimaryTopicOf Pegmatite.
