Definition of pegmatite Pegmatite

/pɛˈgmʌtajˌt/ - [pegmutayt] - peg•ma•tite

We found 6 definitions of pegmatite from 5 different sources.

What does pegmatite mean?

Plural: pegmatites

pegmatite - a form of igneous rock consisting of extremely coarse granite resulting from the crystallization of magma rich in rare elements

igneous rock rock formed by the solidification of molten magma

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pegmatite (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.