mineral
Blue sodalite (likely)
Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂
AI-generated identification · may be incorrectSmall opaque-to-translucent deep-blue, roughly polished piece with pale mottling; sodalite has a vitreous to greasy luster, Mohs hardness 5.5–6, and cubic crystal structure. The image alone cannot confirm the identification; lazurite or dyed stone can look similar.
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Physical properties
Small opaque-to-translucent deep-blue, roughly polished piece with pale mottling; sodalite has a vitreous to greasy luster, Mohs hardness 5.5–6, and cubic crystal structure. The image alone cannot confirm the identification; lazurite or dyed stone can look similar.
Formation & geological history
Forms in silica-poor, sodium-rich igneous rocks, especially nepheline syenite, during crystallization; deposits range from ancient to geologically recent intrusions.
Uses & applications
Used as a decorative stone, beads, carvings, and inexpensive jewelry; also collected as a mineral specimen.
Geological facts
Sodalite is often confused with lapis lazuli, but typically lacks lapis’s abundant gold-colored pyrite flecks.
Field identification & locations
Common sources include Canada, Brazil, Namibia, and Greenland. Look for rich blue color with white veining and no metallic pyrite; a hardness or chemical test can help distinguish look-alikes.
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