Under BGS terminology, a pegmatitic rock (for example, a pegmatitic gabbro) is a coarse-grained rock containing patches of much coarser-grained rock of essentially the same composition. [7] …

Pegmatites are extreme igneous rocks that form during the final stage of a magma’s crystallization. They are extreme because they contain exceptionally large crystals and they …

Apr 12, 2019 · Pegmatite is an igneous rock that form end of the stage a magma’s crystallization. Pegmatites contain exceptionally large crystals and they contain rarely minerals than other …

pegmatite, almost any wholly crystalline igneous rock that is at least in part very coarse grained, the major constituents of which include minerals typically found in ordinary igneous rocks and …

Pegmatite is a coarse-grained igneous rock, renowned for its exceptionally large crystals, Composed mainly of quartz, feldspar, and mica, it shares a similar composition to granite but …

Pegmatite is an intrusive igneous rock defined by its very large, interlocking crystals that can range in size from 1 cm to over 1 meter. It is usually primarily composed of quartz, feldspar, …

Jun 13, 2018 · Pegmatite is called an intrusive igneous rock because it forms when magma solidifies under the Earth's surface. In contrast, when magma solidifies outside the Earth's …

Silica undersaturated (without quartz) magmatic rocks may be also pegmatitic. The term “pegmatite” was first used by a French mineralogist René Haüy, but he used this term as a …

Sep 11, 2022 · Pegmatites are intrusive or plutonic igneous rocks with wholly crystalline, unusually large, or coarse crystals that may sometimes interlock. These rocks form from a low …

The meaning of PEGMATITE is a coarse variety of granite occurring in dikes or veins.