mineral

Polished labradorite heart pendant

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

AI-generated identification · may be incorrect

Hardness 6–6.5 Mohs; gray-green to brown body color with possible blue-green labradorescence, though little iridescence is visible here. It has a vitreous to pearly luster, triclinic crystals, and two good cleavage directions; specific gravity is about 2.68–2.72.

Identified September 17, 2026More mineral →

Explore Polished labradorite heart pendant in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Forms in slowly cooled, calcium-rich igneous rocks—especially anorthosite, gabbro, and basalt—by exsolution within feldspar crystals. Major deposits are Precambrian, notably in Madagascar, Finland, Canada, Norway, and Russia.

Uses & applications

Used as ornamental stone, cabochons, beads, carvings, and jewelry; polished pieces are valued for flash (labradorescence).

Geological facts

Its optical color flashes result from light interference between microscopic feldspar lamellae, not surface paint or coating.

Field identification & locations

Identify it by gray feldspar color, moderate hardness, cleavage, and blue/gold flashes when tilted under a strong light; this specimen may also contain darker mafic inclusions or fractures. It is a pendant-shaped, human-polished geological material.