mineral

Labradorite

Labradorite (Ca,Na)(Al,Si)4O8

AI-generated identification · may be incorrect

Hardness: 6-6.5 on Mohs scale; Color: Gray to dark gray with labradorescence (blue, green, gold flashes); Luster: Vitreous to pearly; Crystal System: Triclinic; Cleavage: Two directions at nearly 90 degrees; Specific Gravity: 2.68-2.72.

Hardness: 6-6
Luster: Vitreous to pearly

Identified July 10, 2026More mineral →

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Physical properties

Formation & geological history

Formed in mafic igneous rocks such as basalt, gabbro, and norite, as well as in anorthosites. It crystallizes from cooling magma in the Earth's crust. Most specimens are from the Proterozoic Era.

Uses & applications

Predominantly used as a gemstone in jewelry, decorative carvings, and occasionally as a facing stone in architecture for its aesthetic appeal.

Geological facts

Labradorite is famous for its optical effect known as labradorescence, caused by internal lamellar structures that diffract light. Legend says it contains the Northern Lights (Aurora Borealis).

Field identification & locations

Identified by its distinctive schiller effect or 'flash' when rotated under light. Commonly found in Labrador (Canada), Madagascar, Finland, and Russia. Collectors should look for clean planes of cleavage and strong color play.