mineral

Blue-gray tumbled stone, likely sodalite or dyed stone

Probable sodalite (Na₈Al₆Si₆O₂₄Cl₂); exact identification requires testing

AI-generated identification · may be incorrect

Small rounded, polished pebble with blue-gray color and fine dark mottling; likely vitreous to dull luster, hardness about 5.5–6 Mohs, massive rather than visibly crystalline, and no obvious cleavage. The photo cannot reliably distinguish sodalite from dyed jasper, basalt, or another blue aggregate.

Identified August 26, 2026More mineral →

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Physical properties

Formation & geological history

If sodalite, it formed in silica-poor, alkaline igneous rocks such as nepheline syenite, generally in Precambrian to younger alkaline complexes. Tumbled specimens are mechanically polished and may be commercially dyed.

Uses & applications

Used as a decorative stone, cabochon, bead, carving material, and inexpensive collector specimen; not typically used structurally.

Geological facts

Sodalite commonly shows white calcite veining and a richer royal-blue color, while dyed materials may have unnaturally uniform color or pigment concentrated in cracks.

Field identification & locations

Common sources include Canada, Brazil, Namibia, and Russia. Check streak, hardness, translucency, and dye concentration; definitive identification may require refractive index, specific gravity, or microscopy.