mineral
Tumbled blue sodalite
Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂
AI-generated identification · may be incorrectHardness 5.5–6; vivid blue with white veining and occasional dark inclusions, vitreous to greasy luster. It has a cubic crystal structure and poor cleavage; the pictured piece is polished, so its natural crystal form is not visible.
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Physical properties
Hardness 5.5–6; vivid blue with white veining and occasional dark inclusions, vitreous to greasy luster. It has a cubic crystal structure and poor cleavage; the pictured piece is polished, so its natural crystal form is not visible.
Formation & geological history
Forms in silica-poor, sodium-rich igneous rocks, especially nepheline syenite, during magma crystallization. Sodalite-bearing deposits are Precambrian in age, though the specimen’s exact source and age cannot be determined from the image.
Uses & applications
Used as a decorative stone in jewelry, carvings, and polished collectibles; it is not generally valued as a precious gemstone.
Geological facts
Blue sodalite is often confused with lapis lazuli, but lapis typically contains golden pyrite flecks.
Field identification & locations
Recognize it by its rich blue color and irregular white calcite-like streaks; major sources include Brazil, Canada, and Namibia. The image is consistent with tumbled sodalite, though visual identification alone is not definitive.
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