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Pegmatite vs Migmatite - What's the difference?

pegmatite | migmatite |

As nouns the difference between pegmatite and migmatite

is that pegmatite is 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 while migmatite is any rock of mixed appearance, being an intimate mixture of granite and older rock, specifically from intense metamorphism which partially melts the rock, causing it to recrystallize in a state intermediate between igneous and metamorphic.

pegmatite

English

(wikipedia pegmatite)

Noun

(en 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.

    • See also

    *feldspar *granite *quartz ----

    migmatite

    English

    (wikipedia migmatite)

    Noun

    (en noun)
  • (geology) Any rock of mixed appearance, being an intimate mixture of granite and older rock, specifically from intense metamorphism which partially melts the rock, causing it to recrystallize in a state intermediate between igneous and metamorphic.
  • *2004 , (Richard Fortey), The Earth , Folio Society 2011, p. 163:
  • *:More specifically, many of these rocks are described as migmatites , in which the pink veins seem to blend insensibly into a kind of swirling granite.