different between pegmatite vs migmatite

English

pegmatite (plural pegmatites)

A coarsely crystalline igneous or plutonic rock composed primarily of feldspar and quartz, normally with muscovite and/or biotite mica.

pegmatite f (plural pegmatiti)

From Swedish migmatit, from Ancient Greek ????? (mígma, “mixture”) + Swedish -it (“-ite”).

migmatite (plural migmatites)

(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.

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