Sodalite XXL columns, originating from Bolivia.

The mineral sodalite is a chlorine-containing sodium-aluminum silicate with the chemical formula Na8Al6Si6O24Cl2. The tectosilicate belongs to the feldspar substitutes. The white, gray, pink, green, or azure blue sodalite has a glassy to greasy luster and a white streak color, and the cleavage is poor according to the crystal plane [110]. The average density is 2.29 and the hardness is 6. The crystal system is cubic, and the mineral is not radioactive. The name of the mineral sodalite is derived from its chemical composition; the English word sodium means "natrium." Sodalite primarily occurs in nepheline syenites, phonolites, and other felsic, silica-poor igneous and metamorphic rocks. The type locality is located in the Ilimaussaq massif in Greenland.