Natrolite n. : A zeolite occuring in groups of glassy acicular crystals, and in masses which often have a radiated structure. It is a hydrous silicate of alumina and soda.

Example:
whats the scientific name for Natrolite? what is the rarity of Natrolite?

Taxonomy
Natrolite, mineral, zeolites, free encyclopedia, the crystals, crystals, square prism, basalt, Needle stone, compact, fibers, specimens, Puy, sodium, search, belonging, formula, acicular.

Defination from the web:
natrolite by Martin Heinrich Klaproth in 1803. ... Natrolite is readily distinguished From other fibrous zeolites by its optical characteristics. ... Natrolite occurs with other zeolites in the amygdaloidal cavities of basaltic igneous rocks. ...