Mineral
Natrolita
Na₂Al₂Si₃O₁₀·2H₂O · Tectosilicatos
Natrolite is a zeolite of the tectosilicate group, valued for its acicular crystals that commonly arrange in radial bundles. Its usual colour is white, but it can take pinkish or yellowish hues due to inclusions or surface alterations.
Etymology
From the Greek "natro" (sodium) and "lithos" (stone), in allusion to its sodic composition.