mineral

Labradorite

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

Hardness: 6–6.5 Mohs scale. Color: Pale green, gray, or blue with labradorescence (shiller effect). Luster: Vitreous to pearly. Crystal system: Triclinic. Specific gravity: 2.68–2.72.

Hardness: 6–6
Luster: Vitreous to pearly

Identified March 9, 2026More mineral →

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Physical properties

Hardness: 6–6.5 Mohs scale. Color: Pale green, gray, or blue with labradorescence (shiller effect). Luster: Vitreous to pearly. Crystal system: Triclinic. Specific gravity: 2.68–2.72.

Formation & geological history

Formed in mafic igneous rocks such as basalt and gabbro, as well as in anorthosite. It crystallizes from cooling magma in deep-seated plutonic environments.

Uses & applications

Used primarily as a gemstone for jewelry (pendants, rings), decorative ornaments, and widely used in metaphysical practices. High-quality specimens are also used in architectural stone facing.

Geological facts

Labradorite is famous for its 'schiller' effect or labradorescence, which is caused by light reflecting off microscopic layers (lamellae) within the crystal. It was first discovered on Paul's Island in Labrador, Canada, in 1770.

Field identification & locations

Identify in the field by rotating the stone to look for flashes of iridescent colors against a dark gray or green base. Commonly found in Canada, Madagascar, Norway, and Finland. Collectors should look for vibrant blue or gold flashes.