Difference between revisions of "Sodalite"

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scapolite; Princess blue; hackmanite; sodalita (Esp.); sodalite (Fr., Port.); Sodalit (Deut.)
scapolite; Princess blue; hackmanite; sodalita (Esp.); sodalite (Fr., Port.); Sodalit (Deut.)
[[[SliderGallery rightalign|sodaliteRS.jpg~Raman]]]
[[[SliderGallery rightalign|SODALITE PMA.TIF~FTIR (PMA)|sodaliteRS.jpg~Raman]]]
== Other Properties ==
== Other Properties ==

Latest revision as of 11:11, 4 December 2019



A blue, glassy mineral of sodium aluminum silicate that has been used as a gemstone and for ornamentation. Sodalite was discovered in Greenland in 1806. It is produced in soda rich magmas and other deposits have been found near Vesuvius, in Norway, Romania, Portugal, Russia, Bolivia, Brazil, Canada (Ontario, Quebec, British Columbia) and the U.S. (Maine). Sodalite resembles lapis lazuli, but is harder and does not contain the gold colored iron pyrite flecks. Hackmanite, a variety of sodalite, fades to white when exposed to light but will regain its dark blue color when left in the dark.


Synonyms and Related Terms

scapolite; Princess blue; hackmanite; sodalita (Esp.); sodalite (Fr., Port.); Sodalit (Deut.)





Other Properties

Isometric system found as dodecahedrons or masses. Fluorescent (patchy orange).

Streak = white. Fracture = conchoidal or uneven. Luster = vitreous to greasy. Flame = yellow (sodium color)

Composition Na4Al3(SiO4)3Cl
Mohs Hardness 5.5 - 6.0
Density 2.14-2.50
Refractive Index 1.483-1.487

Additional Information

Mineralogy Database: Sodalite

Additional Images

Sources Checked for Data in Record

  • Jack Odgen, Jewellery of the Ancient World, Rizzoli International Publications Inc., New York City, 1982
  • Frank A. Lent, Trade names and Descriptions of Marbles, Limestones, Sandstones, Granites and Other Building Stones Quarried in the United States Canada and other Countries., Stone Publishing Co, New York, 1925
  • Encyclopedia Britannica, http://www.britannica.com Comment: "sodalite" Encyclopædia Britannica [Accessed December 4, 2001].
  • C.W.Chesterman, K.E.Lowe, Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf, New York, 1979
  • Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976