mineral
Blue sodalite-bearing rock, likely sodalite in nepheline syenite
Sodalite (Na₈Al₆Si₆O₂₄Cl₂), possibly in nepheline syenite
AI-generated identification · may be incorrectBlue to gray-blue with cream/white matrix; vitreous to greasy luster and massive texture. Sodalite hardness is 5.5–6 Mohs, with poor cleavage and specific gravity about 2.27–2.33; exact properties are uncertain from the photograph.
Identified More mineral →
Explore Blue sodalite-bearing rock, likely sodalite in nepheline syenite in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Blue to gray-blue with cream/white matrix; vitreous to greasy luster and massive texture. Sodalite hardness is 5.5–6 Mohs, with poor cleavage and specific gravity about 2.27–2.33; exact properties are uncertain from the photograph.
Formation & geological history
Forms in silica-undersaturated, alkaline igneous rocks such as nepheline syenite, crystallizing from magma during cooling. Deposits commonly formed in the Precambrian to younger geological eras.
Uses & applications
Used as an ornamental stone, carving material, cabochons, beads, and decorative tiles; generally less valuable than lapis lazuli.
Geological facts
Its strong blue color is produced by sulfur-related defects in the crystal structure; white veining or matrix may resemble lapis lazuli but sodalite typically lacks abundant metallic pyrite.
Field identification & locations
Commonly found in Canada, Brazil, Russia, Namibia, and Greenland. Identify by its opaque royal-blue color, relatively low hardness, white veining, and lack of pyrite; testing requires a fresh surface or mineral analysis.
