A pegmatite is an igneous rock showing a very coarse texture, with large interlocking crystals usually greater in size than 1 cm (0.4 in) and sometimes greater than 1 meter (3 ft). Most …

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 …

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 …

Sep 1, 2012 · Pegmatite is a very coarse-grained igneous rock with giant crystals. Discover how it forms, what minerals it contains, and where they occur.

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 …

There are two main types of pegmatites: simple pegmatites, which have a relatively uniform mineral composition, and rare-mineral pegmatites, which contain a more diverse array of …

Apr 24, 2025 · Pegmatite intrusions along the Painted Wall NPS Photo Pegmatite refers to igneous rock showing very coarse texture with unusually large, intergrown crystals. It consists …

Pegmatite is an intrusive igneous rock, forming below the Earth’s surface where magma slowly cools. Its exceptionally coarse-grained texture features individual mineral crystals that are …

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, …

Nov 1, 2025 · pegmatite (countable and uncountable, plural pegmatites) A coarsely crystalline igneous or plutonic rock composed primarily of feldspar and quartz, normally with muscovite …