mineral

Labradorite

Labradorite, a plagioclase feldspar: approximately (Ca,Na)(Al,Si)₄O₈

AI-generated identification · may be incorrect

Mohs hardness 6–6.5; gray-green body with blue-green iridescent flashes (labradorescence), vitreous luster, triclinic crystals, and two good cleavage directions. The image appears to show a rough or partly polished piece.

Identified October 10, 2026More mineral →

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Physical properties

Formation & geological history

Forms in cooling, calcium-rich igneous rocks such as gabbro and anorthosite; its age depends on the deposit, commonly Precambrian. Internal feldspar lamellae produce the characteristic optical flashes.

Uses & applications

Used for jewelry, carved objects, decorative stone, and mineral collections; large blocks may be used as architectural facing stone.

Geological facts

Labradorescence is caused by light scattering from fine internal layers, not a surface coating.

Field identification & locations

Tilt it under a light to see shifting blue, green, or gold flashes; common sources include Labrador, Canada, Madagascar, Finland, and Norway. This image is consistent with labradorite, though a photo alone cannot confirm the identification.