mineral

Tumbled sodalite

Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂, likely with white calcite and dark matrix minerals

AI-generated identification · may be incorrect

Typically deep blue to blue-gray with white veining or patches, vitreous to greasy luster, massive granular texture, and no obvious cleavage in this tumbled piece; Mohs hardness 5.5–6, specific gravity about 2.27–2.33. The specimen appears rough-polished rather than fully gem-grade.

Identified September 13, 2026More mineral →

Explore Tumbled sodalite in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Sodalite forms in silica-poor, sodium-rich igneous rocks such as nepheline syenite and related alkaline intrusions, generally during Precambrian to younger magmatic events. Common associated minerals include calcite, nepheline, and feldspar.

Uses & applications

Used as an ornamental stone, carving material, cabochons, beads, and inexpensive jewelry; large masses are used decoratively. It has limited industrial use.

Geological facts

Its strong royal-blue color can resemble lapis lazuli, but sodalite generally lacks abundant metallic pyrite flecks. Identification is supported by blue color, white calcite veining, moderate hardness, and lack of a glassy transparent appearance.

Field identification & locations

Common sources include Brazil, Canada, Namibia, Russia, and Greenland; the image is consistent with material sold as tumbled sodalite, though laboratory testing would be needed for certainty. Scratch testing and a streak test can help distinguish it from harder lapis lazuli or dyed stones.