mineral

Blue sodalite specimens

Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂, commonly with white calcite veining

AI-generated identification · may be incorrect

Usually deep royal to gray-blue with white veining or patches; vitreous to greasy luster and massive or granular structure. Mohs hardness 5.5–6, poor cleavage, white streak, and specific gravity about 2.2–2.4.

Identified August 15, 2026More mineral →

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Physical properties

Formation & geological history

Forms in silica-poor, sodium-rich alkaline igneous rocks such as nepheline syenites and associated pegmatites. Most specimens formed in Precambrian to younger alkaline complexes; exact age depends on locality.

Uses & applications

Used as an ornamental and lapidary stone for carvings, cabochons, beads, and tumbled stones; attractive cabinet specimens are collected. It has limited industrial use.

Geological facts

The image appears to show several pieces of blue sodalite, including polished and rough material; white areas are likely calcite or feldspar. Sodalite is commonly confused with lapis lazuli, but typically lacks abundant metallic pyrite flecks.

Field identification & locations

Identify by its intense blue color, white veining, moderate hardness, and absence of pyrite; localities include Canada, Brazil, Russia, Namibia, and Afghanistan. A streak, hardness, and acid test on calcite veining can help confirm it.