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pegmatite::noun | Spocien Dictionary
| Type | Words |
|---|---|
| Type of | igneous rock |
Examples of pegmatite
pegmatite
Very coarse grained pegmatite is associated with the granite of Harney Peak.
From the en.wikipedia.org
In some locations, very coarse-grained pegmatite masses occur with granite.
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If the pegmatite fluid is rich in beryllium, crystals of beryl or chrysoberyl could form.
From the en.wikipedia.org
Pegmatite may be produced by low degrees of partial melting of the crust.
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Also mined here in the 19th century was mica, pegmatite, and quartz.
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The mineral occurs in pegmatite deposits and is easily mistaken for albite and other feldspars.
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The most important sources of sheet mica are pegmatite deposits.
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The overwhelming majority of rare earth elements, tantalum and lithium are found within pegmatite.
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Lithium is present as spodumene or lepidolite within pegmatite.
From the en.wikipedia.org
- A form of igneous rock consisting of extremely coarse granite resulting from the crystallization of magma rich in rare elements
- A pegmatite is a very coarse-grained, intrusive igneous rock composed of interlocking grains usually larger than 2.5 cm in size; such rocks are referred to as pegmatitic.
- A coarsely crystalline igneous or plutonic rock composed primarily of feldspar and quartz, normally with muscovite and/or biotite mica. Often contains other minerals, which may be of economic importance. Pegmatite is chemically identical to granite, but has a much coarser crystal structure. ...
- Pegmatites are very coarse-grained igneous rocks, usually granite, that form from water-rich magmas. They are important sources of gem material and crystal specimens. For more information, please see our Mineralogy FAQ page.
- A type of igneous rock. Pegmatite forms from molten rock buried deep below the surface of the Earth. Since the molten rock is well insulated beneath the surface of the Earth, it cools very slowly, allowing the crystals to grow very large. ...
- A coarse-grained igneous rock with exceptionally large crystals, formed from a magma that contains a high proportion of water.
- Yet another fancy geology word, this time referring to an igneous intrusion that has very large (several cm up to several meter) crystals. Not all pegmatites are granitic, but many are. ...
- The primary sources of many gems are in the pegmatite vein systems often associated with the late - stage igneous activity of granite emplacement. Natural jewel boxes, pegmatites provide the space and the chemical isolation that are necessary for the formation of pure mineral crystals. ...
- A very course grained igneous rock having a grain size of 3cm or larger.
