mineral

Labradorite

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

Hardness: 6.0–6.5 Mohs. Color: Gray, green, or brown base. Luster: Vitreous to pearly. Crystal Structure: Triclinic. Cleavage: Perfect in two directions. Specific Gravity: 2.68–2.72. Displays schiller effect (labradorescence).

Hardness: 6
Color: Gray, green, or brown base
Luster: Vitreous to pearly

Identified March 30, 2026More mineral →

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Physical properties

Formation & geological history

Forms in mafic igneous rocks such as basalt, gabbro, and norite through the cooling of magma. It can also be found in anorthosite and some metamorphic rocks. Most deposits are Proterozoic in age.

Uses & applications

Primarily used in jewelry-making for cabochons and beads, as well as for lapidary carving. Used architecturally for countertops and floor tiles. It is highly valued as a decorative and spiritual collector's stone.

Geological facts

First discovered in Labrador, Canada, in 1770. According to Inuit folklore, the Northern Lights (Aurora Borealis) were once trapped inside the rocks along the coast of Labrador until an Inuit warrior struck them with a spear, freeing some of the light.

Field identification & locations

Identify in the field by its dark gray-green base color and the 'flash' of iridescent colors (blue, gold, green) when tilted under light. Common locations include Canada (Labrador), Madagascar, Finland, and Russia.

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