mineral
Labradorite
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8
AI-generated identification · may be incorrectHardness 6-6.5 on Mohs scale, dark gray to black body color, vitreous to pearly luster, triclinic crystal system, exhibiting distinct labradorescence.
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Physical properties
Hardness 6-6.5 on Mohs scale, dark gray to black body color, vitreous to pearly luster, triclinic crystal system, exhibiting distinct labradorescence.
Formation & geological history
Forms in mafic igneous rocks like basalt and gabbro through slow cooling in crustal magma chambers.
Uses & applications
Extensively used in ornamental jewelry, polished lapidary items, and decorative countertops.
Geological facts
First discovered in Labrador, Canada, in 1770, it is famous for its striking optical flash of blue, green, and gold colors.
Field identification & locations
Easily identified by its characteristic metallic iridescence (labradorescence) when rotated in the light; mined in Canada, Madagascar, and Finland.
