mineral
Sodalite-bearing rock fragment (possibly sodalite in matrix)
Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂; exact specimen uncertain from the image
AI-generated identification · may be incorrectSmall, rough fragment with deep royal-blue and white/cream areas. Sodalite has Mohs hardness 5.5–6, vitreous to greasy luster, and a cubic crystal structure; the pale material may be matrix or another mineral.
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Physical properties
Small, rough fragment with deep royal-blue and white/cream areas. Sodalite has Mohs hardness 5.5–6, vitreous to greasy luster, and a cubic crystal structure; the pale material may be matrix or another mineral.
Formation & geological history
Sodalite typically forms in silica-poor, alkaline igneous rocks such as nepheline syenite. Its age depends on the deposit; such rocks occur in many geological periods.
Uses & applications
Used as an ornamental stone, in carvings and jewelry, and as a mineral specimen; this fragment appears too small for most practical uses.
Geological facts
Sodalite is often confused with lapis lazuli, but usually lacks lapis’s abundant golden pyrite flecks.
Field identification & locations
Look for vivid blue color, commonly with white veining or patches; notable sources include Canada, Brazil, Namibia, and Greenland. A photo alone cannot confirm the mineral or the white component.
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