mineral
Labradorite
(Na,Ca)(Al,Si)4O8 (Feldspar group)
AI-generated identification · may be incorrectHardness of 6-6.5 on the Mohs scale, dark gray to black body color with vitreous luster, triclinic crystal system, and specific gravity around 2.7.
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Physical properties
Hardness of 6-6.5 on the Mohs scale, dark gray to black body color with vitreous luster, triclinic crystal system, and specific gravity around 2.7.
Formation & geological history
Forms in mafic igneous rocks like basalt and gabbro through slow cooling in crustal magma chambers.
Uses & applications
Widely used as a gemstone in jewelry and for ornamental carvings due to its striking iridescence.
Geological facts
Exhibits labradorescence, an optical phenomenon caused by light diffraction in microscopic lamellar intergrowths.
Field identification & locations
Identified by its distinctive multicolored flashes of blue, green, and gold against a dark background; commonly sourced from Canada, Madagascar, and Finland.
