sodalite
noun
so·da·lite ˈsō-də-ˌlīt 
: a transparent to translucent mineral that consists of a silicate of sodium and aluminum with some chlorine, has a vitreous or greasy luster, and is found in various igneous rocks
Example Sentences
Recent Examples on the Web Now, a year later, he is credited with the discovery of Yooperlites, fluorescent, sodalite-rich syenite rocks. 
Andrea Perez Balderrama, Detroit Free Press, 1 July 2019 Like if you're stressed, try smudging lavender on a piece of sodalite, placing it on your third eye, and lying down for an hour. Rachel Jacoby Zoldan, SELF, 28 June 2017
Andrea Perez Balderrama, Detroit Free Press, 1 July 2019 Like if you're stressed, try smudging lavender on a piece of sodalite, placing it on your third eye, and lying down for an hour. Rachel Jacoby Zoldan, SELF, 28 June 2017 Word History
Etymology
soda
First Known Use
1810, in the meaning defined above