mineral

Labradorite (rough specimen)

Labradorite, a plagioclase feldspar: (Ca,Na)(Al,Si)₄O₈

AI-generated identification · may be incorrect

Typically Mohs 6–6.5, with a vitreous to pearly luster and triclinic crystals; cleavage is good in two directions. The pale gray material and orange-blue flashes are consistent with labradorite, though the image alone cannot confirm the identification.

Identified October 15, 2026More mineral →

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Physical properties

Formation & geological history

Forms chiefly in igneous rocks such as gabbro and anorthosite as magma cools; these rocks occur in ancient crust, including Precambrian terranes. The colored sheen results from light interference within fine internal layers.

Uses & applications

Used as a decorative stone, in carvings and jewelry, and as a feldspar source in ceramics and glass. More vivid, intact iridescent pieces are more desirable to collectors.

Geological facts

Its characteristic shifting internal colors are called labradorescence, not surface paint. Labradorite was named after Labrador, Canada, where it was described in the 18th century.

Field identification & locations

Look for gray feldspar with blue, green, or golden flashes that shift as the specimen is tilted; it commonly occurs in anorthosite and related rocks. The pictured small rough piece might sell for about $2–$15, depending on confirmed identity and color display.