Image: <bdi><a href="https://www.wikidata.org/wiki/Q56247090" class="extiw" title="d:Q56247090"><span title="mineral collector and dealer">Robert M. Lavinsky</span></a></bdi> (CC BY-SA 3.0)
orthorhombicuncommonZeolite group (Tectosilicates)
Natrolite
Na2Al2Si3O10·2H2O
This image displays a cluster of delicate, radiating acicular (needle-like) crystals of Natrolite, predominantly white to colorless, forming a spherical or hemispherical aggregate.
Natrolite Physical Properties
Mohs Hardness
5Crystal System
orthorhombicLuster
vitreousStreak Color
whiteCleavage
perfect on {110}Fracture
uneven to conchoidalSpecific Gravity
2.25Colors
white, colorless, pink, yellowishTransparency
transparentType Locality
Tick Canyon, Lang, Los Angeles County, California, USAMineral Group
Zeolite group (Tectosilicates)Uses
collector, adsorbent (minor)Associated Minerals
calcite, apophyllite, heulandite, stilbite, prehniteRarity
uncommonGeological Context
Natrolite typically forms in the cavities and amygdules of basaltic volcanic rocks, as well as in some granitic pegmatites and hydrothermal veins. It is a product of low-temperature hydrothermal alteration.
