
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 incorrectPolished, 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.
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