mineral

Polished labradorite

Labradorite, Ca(Al2Si2O8)–NaAlSi3O8 (plagioclase feldspar)

AI-generated identification · may be incorrect

Blue-green and golden iridescent flashes (labradorescence), gray-brown body, vitreous to pearly luster, Mohs hardness 6–6.5, relatively dense, with two good cleavage directions and triclinic crystals. The specimen appears cut and polished, possibly with a pale feldspar-rich outer zone.

Identified August 17, 2026More mineral →

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Physical properties

Formation & geological history

Forms in slowly cooled mafic igneous rocks such as anorthosite, gabbro, and basaltic intrusions; its age varies by deposit. Common gem-quality material comes from Madagascar, Finland, Canada, and Norway.

Uses & applications

Used as a decorative gemstone, cabochon, jewelry stone, carvings, and polished display pieces; non-gem labradorite is used as crushed stone and ornamental rock.

Geological facts

Its color play results from light interference within microscopic exsolution layers in the feldspar, not from surface paint. Blue, green, gold, and multicolor flashes are especially sought after.

Field identification & locations

Identify it by rotating the stone under a strong light: broad internal flashes should move across a gray-to-brown feldspar body. The reported Croatian location near 45.5°N, 16.4°E is not a well-known source of gem labradorite, so imported or traded material is more likely than a local find.