mineral

Sodalite specimens

Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂, likely with associated feldspar or calcite

AI-generated identification · may be incorrect

Typically deep royal blue to violet-blue with white or gray veining, vitreous to greasy luster, and massive or granular crystal structure; Mohs hardness 5.5–6, imperfect cleavage, and specific gravity about 2.25–2.35.

Identified September 4, 2026More mineral →

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Physical properties

Formation & geological history

Forms in silica-poor, sodium-rich igneous rocks—especially nepheline syenites and related pegmatites—through magmatic crystallization; most specimens are Precambrian to younger, depending on locality.

Uses & applications

Used as an ornamental stone, carving material, cabochons, beads, and polished collectibles; gem-quality pieces are valued for vivid blue color and attractive veining.

Geological facts

Sodalite is commonly confused with lapis lazuli, but lapis usually contains visible golden pyrite and consists largely of lazurite. The pictured pieces appear tumbled or polished, with blue sodalite and lighter matrix.

Field identification & locations

Identify by its saturated blue color, white veining, moderate hardness, and lack of pyrite sparkle; common sources include Brazil, Canada, Namibia, Russia, and the United States. A streak, hardness, and specific-gravity test can confirm it.