mineral
Blue tumbled stone, possibly sodalite
Likely sodalite (Na₈(Al₆Si₆O₂₄)Cl₂); identification is uncertain from the image
AI-generated identification · may be incorrectDeep blue, opaque, polished and rounded with subtle lighter-blue patches; sodalite has a Mohs hardness of 5.5–6, vitreous to greasy luster, and a cubic crystal structure. No obvious cleavage is visible on this tumbled surface.
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Physical properties
Deep blue, opaque, polished and rounded with subtle lighter-blue patches; sodalite has a Mohs hardness of 5.5–6, vitreous to greasy luster, and a cubic crystal structure. No obvious cleavage is visible on this tumbled surface.
Formation & geological history
Sodalite forms in silica-poor, sodium-rich igneous rocks, especially nepheline syenites; deposits range from Precambrian to younger ages.
Uses & applications
Used for ornamental objects, beads, and inexpensive jewelry; rough material is also collected as a mineral specimen.
Geological facts
Sodalite is commonly confused with lapis lazuli, but typically lacks lapis’s golden pyrite flecks.
Field identification & locations
Look for opaque royal-blue color, often with white calcite veining; notable sources include Brazil, Canada, Namibia, and Greenland. The image alone cannot confirm the identification.
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