Sodalite Gemstone Egg with the Crest of the Tsars. Sodalite is widely used as an deep blue ornamental gemstone, and is a member of the sodalite group which includes lazurite. The structure of sodalite, named after its sodium content, was first studied by Linus Pauling in 1930. Approximately 2¼" in height (60mm). Comes with a stand. 1 only, as shown.