Pegmatite - Wikipedia
网页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 pegmatites are composed of quartz, feldspar, and mica, having a similar silicic composition to granite.
Pegmatite: Igneous Rock - Pictures, Definition & More - Geology.com
网页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 sometimes contain minerals that are rarely found in other types of rocks.
Pegmatite: Identification, Pictures & Info for Rockhounds
网页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, and mica, but often includes rarer minerals and gemstones. Pegmatite forms in the last stages of magma crystallization.
Pegmatite | Properties, Composition, Formation, Uses, Occurrence
网页2019年4月12日 · 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 types of rocks. They have interlocking crystals usually larger than 2.5 cm …
Pegmatite | Igneous, Minerals, Crystals | Britannica
网页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 in which extreme textural variations, especially in grain size, are characteristic.
Here Is What Pegmatitic Texture Is and Its Characteristics
网页2022年9月12日 · Pegmatitic texture refers to crystalline plutonic or intrusive igneous rocks with exceptionally large crystals. Rocks of this texture have crystals at least 0.4 inches (1 cm) in diameter, with larger ones more than 1.2 Inches (3 cm) to as large as several feet.
Pegmatite: An Intrusive Igneous Rock - ThoughtCo
网页2018年6月13日 · Pegmatite is an intrusive igneous rock that contains large, interlocking crystals. Discover fascinating facts about this potentially valuable rock.
Pegmatite: Formation, Composition, Properties, Uses - Geology In
网页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 differs significantly in its texture.
Pegmatite Rocks: Identification, Characteristics, Pictures, and More ...
网页2024年4月30日 · Pegmatite rocks form from the slow cooling of molten rock deep within the Earth’s crust. These unique rocks are a result of specific geological processes that involve the crystallization of minerals in large cavities within the cooling magma.
Here Is a Quick Hack to Understanding Pegmatites - Geology Base
网页2022年9月11日 · 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-viscosity fluid phase rich in volatile compounds formed during the crystallization of the last magma portion.