igneous
Pegmatite
Igneous Pegmatite
AI-generated identification · may be incorrectMohs hardness varies from 6 to 7 depending on mineral content, featuring very large interlocking crystals with pink, white, and dark patches. It possesses a vitreous to pearly luster and lacks uniform cleavage.
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Physical properties
Mohs hardness varies from 6 to 7 depending on mineral content, featuring very large interlocking crystals with pink, white, and dark patches. It possesses a vitreous to pearly luster and lacks uniform cleavage.
Formation & geological history
Formed from the slow-cooled, water-rich residual melts of magma chambers deep within the Earth's crust, typically during the final stages of crystallization.
Uses & applications
Used as a primary source for rare earth elements, industrial minerals like feldspar and quartz, and gem-quality crystals such as tourmaline and beryl.
Geological facts
Pegmatites are famous for hosting some of the largest individual mineral crystals ever discovered on Earth, sometimes measuring several meters in length.
Field identification & locations
Identified by its extremely coarse-grained texture with giant crystals. It is commonly found globally within continental shield areas and major mountain-building belts.
