mineral
Blue sodalite (likely)
Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂
AI-generated identification · may be incorrectHardness 5.5–6; vivid royal-blue color with white mineral veining, vitreous to greasy luster, and a cubic crystal structure. The rough fragment’s appearance is consistent with sodalite, though a photo alone cannot confirm it.
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Physical properties
Hardness 5.5–6; vivid royal-blue color with white mineral veining, vitreous to greasy luster, and a cubic crystal structure. The rough fragment’s appearance is consistent with sodalite, though a photo alone cannot confirm it.
Formation & geological history
Forms in silica-poor, sodium-rich igneous rocks, especially nepheline syenites; geological ages vary by deposit. Common sources include Canada, Brazil, Namibia, and Greenland.
Uses & applications
Used as a decorative stone, in carvings and beads, and occasionally as an ornamental building material; attractive pieces are collected or cut for jewelry.
Geological facts
Sodalite is often confused with lapis lazuli, but usually lacks lapis’s golden pyrite flecks and is generally less hard.
Field identification & locations
Look for deep blue color with irregular white calcite-like patches; a hardness or mineral test can help distinguish it from lapis and dyed stones. This specimen appears small and rough, with no visible gem-quality polish.
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