igneous
Lujavrite
Nepheline Syenite
AI-generated identification · may be incorrectHardness of 6 on the Mohs scale, greenish to brownish color with distinct dark amphibole or pyroxene crystals, vitreous to greasy luster, and tabular crystal structure.
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Physical properties
Hardness of 6 on the Mohs scale, greenish to brownish color with distinct dark amphibole or pyroxene crystals, vitreous to greasy luster, and tabular crystal structure.
Formation & geological history
Formed via the slow cooling and crystallization of alkaline magma deep within the Earth's crust, typically associated with intrusive igneous complexes.
Uses & applications
Primarily collected as a rare geological specimen by mineral enthusiasts and studied by petrologists for alkaline magmatic processes.
Geological facts
This rock is famous for containing complex rare-earth element minerals and is a key component of the massive Ilimaussaq complex in Greenland.
Field identification & locations
Identify by its characteristic dark acicular or tabular crystals embedded in a pale feldspathic matrix; found mainly in specialized alkaline intrusions.
