Pegmatoid vs. Pegmatite: What's the Difference?

(mineralogy) Resembling pegmatite

A coarse-grained granite, sometimes rich in rare elements such as uranium, tungsten, and tantalum.

Such a mineral

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

Resembling pegmatite; pegmatic.

Graphic granite. See under Granite.

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