The Probert Encyclopaedia of Rocks & Minerals

ANALCIME

Analcime is a mineral of the zeolite group noted for its vitreous lustre, and has the formulae NaAlSi2O6ù2H2O and a relative hardness of 6. It is found in the cavities of intrusive and volcanic igneous rocks; often as clear shiny crystals and is associated with calcite and other zeolites. Analcime was first identified on islands off Sicily and was confirmed as a distinct mineral in 1797 by the French mineralogist Rene-Just Hauy.
Research Analcime