A mineral, occurring massive, frequently globular, or crystallized in the form of a right oblique-angled prism. It has been ranked among the zeolites, but is now considered as distinct.
Word of the Day: Catachrestical
A mineral of the Zeolite family, often occurring in amygdaloid, in foliated masses, and also in monoclinic crystals with pearly luster on the cleavage face. It is a hydrous silicate of alumina and lime.
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