Sodalite

[sәjdәlait]

Definition

(noun.) a vitreous mineral consisting of sodium aluminum silicate and sodium chloride in crystalline form; occurs in igneous rocks.

Checked by Emma--From WordNet

Definition

(n.) A mineral of a white to blue or gray color, occuring commonly in dodecahedrons, also massive. It is a silicate of alumina and soda with some chlorine.

Inputed by Jeanine