mineral

Sodalite beads

Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂, likely with minor lazurite/pyrite or calcite inclusions

AI-generated identification · may be incorrect

Typically deep royal blue with white or gray veining and occasional brassy flecks; vitreous to greasy luster, Mohs hardness 5.5–6, cubic crystal system, poor cleavage, and specific gravity about 2.25–2.35. The beads are polished and drilled, so surface luster is enhanced.

Identified August 7, 2026More mineral →

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Physical properties

Formation & geological history

Forms in silica-poor, sodium-rich igneous rocks such as nepheline syenite and associated metamorphic zones, commonly during alkaline magmatic activity. Major deposits include Canada, Brazil, Namibia, and Russia; the pictured material is likely lapidary-grade sodalite.

Uses & applications

Used for beads, cabochons, carvings, ornamental stone, and small decorative objects; it is generally less valuable than gem-quality lapis lazuli.

Geological facts

Blue color comes mainly from sulfur-related defects and mineral chemistry; white patches are commonly calcite or feldspar, while metallic flecks may be pyrite. Sodalite can resemble lapis lazuli but usually has less abundant pyrite and a lighter, more mottled appearance.

Field identification & locations

Identify by its opaque blue color, white veining, moderate hardness, and lack of the strong glassy translucence of many blue gemstones; avoid acids because calcite-rich material may fizz. These are polished jewelry beads rather than a natural crystal specimen.