mineral

Labradorite

Feldspar (Plagioclase Series), (Ca,Na)(Al,Si)4O8

Hardness: 6-6.5 on Mohs scale; Color: Dark grey, grey-green, or brownish with flashes of blue, green, and gold; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Two directions at nearly 90 degrees; Specific Gravity: 2.68-2.72.

Hardness: 6-6
Luster: Vitreous to pearly

Identified March 30, 2026More mineral →

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Physical properties

Formation & geological history

Forms primarily in mafic igneous rocks like basalt and gabbro through slow cooling of magma. Often found in anorthosite complexes dating back to the Proterozoic eon.

Uses & applications

Predominantly used as a gemstone in jewelry, ornamental carvings, and high-end architectural tiles or countertops due to its aesthetic appeal.

Geological facts

It exhibits a unique optical phenomenon called 'labradorescence,' which is caused by light diffracting between thin layers of different feldspar minerals. It was first officially discovered by missionaries in Labrador, Canada, in 1770.

Field identification & locations

Identify in the field by looking for a 'schiller' or metallic flash of color when tilted under light. Commonly found in Canada (Labrador), Madagascar, Norway, and Russia. For collectors, higher transparency and more vibrant color flashes increase desirable qualities.

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

metamorphic

Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]

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Epidote

Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)

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