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)
cubiccommonZeolites (Tectosilicates)
Analcime
Na(AlSi2O6)·H2O
The image displays a cluster of well-formed, white to colorless analcime crystals, typically exhibiting a trapezohedral habit with a distinct vitreous luster.
Analcime Physical Properties
Mohs Hardness
5Crystal System
cubicLuster
vitreousStreak Color
whiteCleavage
poor on {100}Fracture
uneven to conchoidalSpecific Gravity
2.25Colors
white, colorless, gray, yellowish, reddish, greenishTransparency
transparent to translucentType Locality
Siusi Alp (Seis Alp), Gardena Valley (Gröden Valley), Bolzano Province (South Tyrol), Trentino-Alto Adige/Südtirol, ItalyMineral Group
Zeolites (Tectosilicates)Uses
collector, minor industrial usesAssociated Minerals
other zeolites, calcite, prehnite, apophyllite, quartzRarity
commonGeological Context
Analcime is a common zeolite mineral that forms in the vesicles and amygdules of basaltic and other mafic igneous rocks, often as a late-stage hydrothermal alteration product. It can also be found in some sedimentary rocks and low-grade metamorphic environments.
