Satellite Crystal Angel carving

Sodalite is a rare, sodium-rich, blue-to-violet tectosilicate mineral belonging to the feldspathoid group, typically forming in silica-poor, alkaline igneous rocks like nepheline syenite and phonolite. It crystallizes in the cubic system, often featuring white calcite veins, a 5.5–6 hardness, and a white streak. 

Key Geological Characteristics

Formation: Sodalite forms deep underground in alkaline magma chambers that lack the silica necessary to form quartz.

Geological Context: It is commonly found in plutonic rocks such as nepheline syenite, trachyte, and phonolite.

Mineral Associations: It is frequently associated with minerals like nepheline, cancrinite, microcline, and calcite.

Key Occurrences: Major deposits are located in Bancroft, Ontario; Ice River, British Columbia; Greenland; Kola Peninsula, Russia; and Namibia.

Physical Properties: While often vibrant blue, it can also appear white, grey, green, or pink. A specific variety called Hackmanite is known for its tenebrescence (color-changing properties when exposed to UV light).

Sodalite is often used as a gemstone, ornamental stone, or in jewelry.