Rock Identifier
Polished labradorite (likely gold-toned variety) (Labradorite, a plagioclase feldspar in the albite–anorthite series, approximately (Ca,Na)(Al,Si)₄O₈) — mineral
mineral

Polished labradorite (likely gold-toned variety)

Labradorite, a plagioclase feldspar in the albite–anorthite series, approximately (Ca,Na)(Al,Si)₄O₈

AI-generated identification · may be incorrect

Polished, opaque-to-translucent stone with muted gold, brown, and gray areas and a glassy sheen; the photo does not show a distinct blue flash. Hardness 6–6.5 Mohs, triclinic crystal structure, two cleavages near 90°, specific gravity about 2.7.

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Physical properties

Polished, opaque-to-translucent stone with muted gold, brown, and gray areas and a glassy sheen; the photo does not show a distinct blue flash. Hardness 6–6.5 Mohs, triclinic crystal structure, two cleavages near 90°, specific gravity about 2.7.

Formation & geological history

Forms in igneous rocks such as basalt, gabbro, and anorthosite as magma cools; labradorite deposits occur in ancient Precambrian and younger igneous terrains. The stone appears to be a shaped and polished specimen.

Uses & applications

Used as a decorative stone, in jewelry and carvings, and by mineral collectors; its value depends strongly on color and visible labradorescence.

Geological facts

Labradorescence is a colorful optical effect caused by light interference within microscopic layers in the feldspar; it may be subtle or absent from some viewing angles.

Field identification & locations

Confirm labradorite by tilting it under a light to look for shifting blue, green, or gold flashes, plus feldspar cleavage and hardness. Notable sources include Labrador, Canada, Madagascar, Finland, and Norway.