mineral

Labradorite

Labradorite (a calcium-enriched feldspar mineral), (Ca, Na)(Al, Si)4O8

Hardness: 6–6.5 on Mohs scale. Color: Pale green, blue, colorless, or grey, showing a characteristic play of iridescent colors (labradorescence). Luster: Vitreous to pearly. Crystal Structure: Triclinic. Cleavage: Perfect in two directions.

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, and also in some metamorphic rocks and anorthosites. It crystallizes from cooling magma in the Earth's crust.

Uses & applications

Predominantly used as a gemstone in jewelry, decorative carvings, and occasionally as a high-end countertop or tile material (blue pearl granite).

Geological facts

First discovered in Labrador, Canada, in 1770. It is famous for its 'schiller' effect, where light interference within the mineral's layers creates a metallic flash of blue, gold, and green.

Field identification & locations

Identify by rotating it in the light to look for flashes of iridescent color. It is commonly found in Canada (Labrador), Madagascar, Norway, and Finland. Collectors look for stones with a wide spectrum of colors and no internal fractures.

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