The sodalites are a group of cubic aluminosilicate minerals. Their color is due to complex polymeric sulfide ions. S₃^- is responsible for the blue color commonly observed in many members of the sodalite group.

Visible Spectra (400 - 800 nm)

Hauyne

• Hauyne , from (Eifel, Rhineland-Palatinate?) Germany. Normalized to 10.0 cm. Colored by polymeric sulfide ions. Data File: Contributed data from Anton Vasiliev, LAL, Moscow: hauyne_Germany , 25 K. Picture: hauyne, Eifel, Germany, GRR 2029.
• Hauyne, from Mendig (Eifel Region), Germany. 1.243 mm thick, blue color. Data file: Contributed data from Janet Harvey, Santa Monica, CA, Hauyne J1, 22 K. Picture: hauyne, Mendig, Germany, 550 K.

Lazurite

• lazurite, GRR 2135. Blue crystals from Badakhstan, Afghanistan.
  
• lazurite, CIT 11358. Blue lapis lazuli containing lazurite from Andes of Ovalle, Coquimbo, Chile

Sodalite

• Sodalite, GRR 1945 from (Ontario, Canada?). 4.11 mm thick with dark blue color. Colored by polymeric sulfide ions. Data File: sodalite1945.
• Sodalite, GRR 2156, from near Mogok, Myanmar; variety hackmanite in the lavender state. This sample changes color from a pale pink in darkness to vivid reddish-lavender upon exposure to sunlight. Data File: sodalite 2156.

Tugtupite

• Tugtupite, GRR 153; red tugtupite from, from Kvanefjeld, Ilimaussaq, Greenland. 0.4 mm thick sample, unoriented. Data File: tugtupite153.  The S₄ molecule is believed to be the species responsible for the red color.

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