A vitreous mineral consisting of sodium aluminum silicate and sodium chloride in crystalline form; occurs in igneous rocks WordNet 3.0 & Open English WordNet

Sodalite is a tectosilicate mineral with the formula Na8Cl2, with royal blue varieties widely used as an ornamental gemstone. Wikipedia

Tectosilicate mineral Wikidata

A mineral of alkaline igneous and plutonic rocks that are low in silica, of the chemical composition of sodium aluminum silicate with chlorine, Na4Al3Si3O12Cl. Pink sodalite is sometimes called hackmanite. Sodalite and lazurite form the sodalite Group of silicate minerals. Wiktionary

Mineral. Wiktionary (translation)