Sunset Dumortierite has a much brighter palette than regular Dumortierite, from light blue to lapis blue to cobalt, as well as some occurrences of dark gray. Dumortierite is an aluminum borosilicate mineral that varies in color from blue, green and brown to the more rare violet and pink. First described in 1881, the mineral was named for French paleontologist Eugene Durmortier (1803-1873). It is believed to bring the wearer water energy and to promote flow, control and orderliness.