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.
an opaque blue stone, similar to Lapis but with a more denim-like blue. Has varying degrees of white veining (calcite) and occasionally a fleck of two of pyrite.
A component of Lapis Lazuli, ornamental sodalite has a rich blue color and is sometimes mistaken for lapis.