Sodalite

Na4(Si3Al3)O12Cl

This sample of sodalite is displayed in the Smithsonian Museum of Natural History. Sodalite is a silicate with sodium and aluminum which contains chlorine. It has the composition Na4(Si3Al3)O12Cl. This gem sample is 8.7 carats. Its origin is unknown.

Mindat: Sodalite

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