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Definition of Pegmatite
1. Noun. A form of igneous rock consisting of extremely coarse granite resulting from the crystallization of magma rich in rare elements.
Definition of Pegmatite
1. n. Graphic granite. See under Granite.
Definition of Pegmatite
1. Noun. 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. Common colors are gray, white, and pink. Pegmatite is quarried for decorative stone and as a source of beryllium, columbium and tantalum when these are present. Gemstones of the quartz/silicate family may also be found in pegmatites. ¹
¹ Source: wiktionary.com
Definition of Pegmatite
1. [n -S]
Medical Definition of Pegmatite
1.
Lexicographical Neighbors of Pegmatite
Literary usage of Pegmatite
Below you will find example usage of this term as found in modern and/or classical literature:
1. Text-book of Geology by Archibald Geikie (1885)
"there is the most intimate crystalline union of the pegmatite with the gneiss,
... Here and there, too, the crumpled folia of gneiss pass into pegmatite, ..."
2. Transactions of the American Institute of Mining, Metallurgical and (1909)
"These are called pegmatite and in them is the home of graphic granite, the curious
intergrowth of quartz and feldspar, such that a cross fracture of the ..."
3. Geological Magazine by Henry Woodward (1904)
"Contorted pegmatite vein in granite, ... I saw thin pegmatite veins, often not
more than a few inches wide, ... Folded pegmatite in a sett quarry, ..."
4. Mineral Deposits by Waldemar Lindgren (1913)
"CHAPTER XXVI MINERAL DEPOSITS OF THE pegmatite DIKES INTRODUCTION Each large ...
Under the name of pegmatite are grouped the coarse granular dike rocks, ..."
5. Technology Quarterly and Proceedings of the Society of Arts by Massachusetts Institute of Technology, Society of Arts (1896)
"THE history of geology is replete with theories of pegmatite, or giant
granite —manifold modifications of the agency of water and heat; and this diversity ..."
6. Dana's Manual of Mineralogy for the Student of Elementary Mineralogy, the by James Dwight Dana, William Ebenezer Ford (1912)
"pegmatite Dikes and Veins. i connection with the deep-seated, coarse-grained
igneous s, especially the granites, we frequently find mineral de- ts which are ..."
7. The Canadian Record of Science by Natural History Society of Montreal (1896)
"Many of the older authorities considered pegmatite veins to be simply eruptive
injections; to them, acid granitic pegmatite veins were almost the only ones ..."
8. The Electric Furnace by Henri Moissan (1904)
"This pegmatite is very interesting. It is known that this eruptive rock has
arrived at the ... The pegmatite studied contained 12.77 Per cent- graphite. ..."
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