Sodalite is an aluminosilicate mineral of the feldspathoid group. It is blue to violet in color and can be mistaken for lapis lazuli. Sodalite was originally discovered in Greenland and can be found in igneous rocks that formed from sodium-rich magmas. High quality specimens can be used for gemstone material.
Chemical composition: Na8(Al6Si6O24)Cl2; Hardness: 5.5-6