pegmatite
peg muh tahyt
- n a form of igneous rock consisting of extremely coarse granite resulting from the crystallization of magma rich in rare elements
- Three years ago miners in the district discovered traces of uraninite (uranium oxide) in pegmatite, a type of rock rich in valuable minerals.
- They worked carefully up the slope, pushing the veld grass gently aside with their hands, until they struck an outcrop of pegmatite and schist.