mineral

Blue sodalite bead necklace

Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂

AI-generated identification · may be incorrect

The beads appear opaque, blue, and polished, but the image does not show enough detail to confirm sodalite; lapis lazuli or dyed stone are alternatives. Sodalite has Mohs hardness 5.5–6, a vitreous to greasy luster, and a cubic crystal structure; beads conceal cleavage and specific gravity is about 2.2–2.3.

Identified September 23, 2026More mineral →

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Physical properties

Formation & geological history

Sodalite forms in silica-poor, sodium-rich igneous rocks, especially nepheline syenites, during crystallization or alteration. Such rocks occur in geologically varied settings and ages.

Uses & applications

Sodalite is used as an ornamental stone and in beads, carvings, and decorative objects; it has limited industrial use.

Geological facts

Sodalite is a feldspathoid mineral, not a feldspar. Some sodalite-rich rock, notably lapis lazuli, contains pyrite and calcite.

Field identification & locations

Confirming the stone requires close inspection: sodalite is commonly deep blue with white veining and does not show lapis lazuli’s typical gold pyrite flecks. Similar-looking dyed stones are common in jewelry.