natrolite

A mineral in the zeolite family with composition Na₂Al₂Si₃O₁₀·2H₂O.

A zeolitic mineral occurring in slender acicular crystals, also in masses with a fibrous and radiating structure, generally of a white color and transparent to translucent.

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.

A fibrous zeolite mineral, being a sodium aluminosilicate, of the chemical formula Na2Al2Si3O10·2H2O.

a group of minerals of the zeolite family consisting of a hydrous silicate of sodium and aluminum