igneous
Pegmatite
Igneous Pegmatite
AI-generated identification · may be incorrectMohs hardness varies by mineral (6-7 overall), pink to white color with metallic flakes, vitreous to pearly luster, coarse-grained crystal structure.
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Physical properties
Mohs hardness varies by mineral (6-7 overall), pink to white color with metallic flakes, vitreous to pearly luster, coarse-grained crystal structure.
Formation & geological history
Formed from the slow crystallization of magma deep within the Earth's crust, often containing exceptionally large crystals.
Uses & applications
Used as a source of rare-earth elements, industrial minerals like feldspar and mica, and gemstone specimen collecting.
Geological facts
Pegmatites can host the largest known crystals on Earth, sometimes measuring many meters in length.
Field identification & locations
Identified by its extremely coarse interlocking crystals, easily found globally in continental cratons and mountain belts.
