mineral

Labradorite (Raw)

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

Hardness: 6-6.5 on Mohs scale. Color: Dark gray to gray-black (base). Luster: Vitreous to pearly. Crystal structure: Triclinic. Cleavage: Perfect in two directions. Features Schillers effect (labradorescence).

Hardness: 6-6
Color: Dark gray to gray-black (base)
Luster: Vitreous to pearly

Identified July 12, 2026More mineral →

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Physical properties

Formation & geological history

Forms in mafic igneous rocks such as basalt or gabbro through the slow cooling of magma. It belongs to the plagioclase feldspar group. Most specimens date back to the Proterozoic era.

Uses & applications

Primarily used as a gemstone in jewelry, decorative carvings, and occasionally as a countertop or building material. It is also popular in metaphysical collections.

Geological facts

Named after Labrador, Canada, where it was first discovered in 1770. The internal iridescent play of colors is caused by submicroscopic planes slanting in one direction.

Field identification & locations

Identify by its dark body color and the characteristic colorful flashes (blue, green, or gold) when turned in the light. Found in Canada, Madagascar, Norway, and Russia. Used as a guide to identify anorthosite formations.