igneous
Pegmatite Granite
Intrusive Igneous Rock
AI-generated identification · may be incorrectHardness of 6-7 on the Mohs scale, pink to grey color with a vitreous to pearly luster, and very coarse-grained crystal structure.
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Physical properties
Hardness of 6-7 on the Mohs scale, pink to grey color with a vitreous to pearly luster, and very coarse-grained crystal structure.
Formation & geological history
Formed from the slow cooling of magma rich in water and rare elements deep within the Earth's crust.
Uses & applications
Used in the extraction of rare minerals, gemstone hunting, and occasionally as decorative stone.
Geological facts
Pegmatites can host giant crystals and rare elements like lithium, boron, and uranium.
Field identification & locations
Identify by its extremely large interlocking crystals, commonly found in continental shields and mountain roots.
