mineral
Labradorite
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8
AI-generated identification · may be incorrectHardness of 6 to 6.5 on the Mohs scale, dark gray to black body color, vitreous to pearly luster, and exhibits distinct labradorescence.
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Physical properties
Hardness of 6 to 6.5 on the Mohs scale, dark gray to black body color, vitreous to pearly luster, and exhibits distinct labradorescence.
Formation & geological history
Forms in mafic igneous rocks such as basalt and gabbro through slow cooling of magma deep within the Earth's crust.
Uses & applications
Widely used in ornamental jewelry, polished spheres, and metaphysical collections.
Geological facts
Labradorescence is caused by light interference within microscopic lamellar intergrowths of the mineral.
Field identification & locations
Easily identified by its characteristic colorful flashes of blue, green, and gold against a dark background when rotated in light.
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