mineral

Labradorite

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

Hardness: 6-6.5 (Mohs scale); Color: Pale green, blue, colorless, grey-white, with iridescent 'Labradorescence' (blue/gold/green flashes); Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect in two directions; Specific gravity: 2.68 - 2.72.

Hardness: 6-6
Luster: Vitreous to pearly

Identified March 31, 2026More mineral →

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Physical properties

Formation & geological history

Formed in mafic igneous rocks such as basalt and gabbro through the slow cooling of magma. Some of the most notable deposits are found in anorthosite complexes, often dating back to the Proterozoic eon.

Uses & applications

Primarily used as a gemstone in jewelry (cabochons and beads), decorative ornamental carvings, and high-end architectural materials (countertops and tiles).

Geological facts

Labradorite displays a unique optical phenomenon called 'Labradorescence,' which is caused by light reflecting off internal sub-microscopic layers of exsolution lamellae (alternating layers of different mineral compositions). Legend says the Northern Lights were trapped inside the rocks of Labrador, Canada, until an Inuit warrior struck them with a spear.

Field identification & locations

Identified in the field by its dark grey-green base color and the distinctive metallic 'flash' of color visible when tilted. Common locations include Labrador (Canada), Madagascar, Finland, and Norway. Tips for collectors: Check for the play of color and ensure the stone is not scratched easily like glass.