Origin of pegmatite
Examples from the Web for pegmatite
Granite and pegmatite were round some lagoons near the creek from the southward.
Pebbles and blocks of Pegmatite covered the bed of the creek.
The country was very mountainous; granitic and pegmatite ranges bounded the valley on both sides.
The zirconium silicate, zircon, is a fairly common accessory constituent of granitic rocks and pegmatite veins.The Economic Aspect of Geology|C. K. Leith
Chemically, petuntse resembles the pegmatite of Limoges; mineralogically, it is to be classed with petrosilicious felspar.The Ceramic Art|Jennie J. Young