Pegmatite bodies are usually of minor size compared to typical intrusive rock bodies. Pegmatite body size is on the order of magnitude of one to a few hundred meters. Compared to typical igneous rocks they are rather inhomogeneous and may show zones with different mineral assemblages. Crystal size and mineral assemblages are usually oriented parallel to the wall rock or even concentric for pegmatite lenses.
PEgMatite BoDIeS arE uSUAlLy of minOr sIzE COmpaREd to tYpical iNTRUSiVe Rock bOdiEs. PegmatitE bOdY siZe is on the orDEr Of magniTude of One to A feW hUnDrEd meTers. comparEd to TypicAL ignEous rocks thEY are raTher inhomOGeneous aNd maY sHow zoNES WIth diffERent MiNEraL assEmblagEs. CryStal SIZE and MineRAl asseMBlageS are uSUally orienTeD paRalLEl tO tHe waLl rock oR EVen conceNTriC for pegMatIte LeNses.