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)
monoclinicuncommonSilicates (Zeolite Group)
Epistilbite
CaAl₂Si₆O₁₆·5H₂O
This specimen features a cluster of white to translucent, tabular to blade-like epistilbite crystals, exhibiting a vitreous luster and forming an aesthetic aggregate.
Epistilbite Physical Properties
Mohs Hardness
3.5Crystal System
monoclinicLuster
vitreousStreak Color
whiteCleavage
Perfect on {010}, good on {100}Fracture
unevenSpecific Gravity
2.22Colors
white, colorless, yellowish, reddish, pinkishTransparency
transparentType Locality
Jalgaon District, Maharashtra, IndiaMineral Group
Silicates (Zeolite Group)Uses
collector, industrial (as a zeolite)Associated Minerals
stilbite, heulandite, scolecite, apophyllite, calcite, quartzRarity
uncommonGeological Context
Epistilbite is a zeolite mineral that typically forms in the amygdales and cavities of basaltic volcanic rocks, resulting from the low-temperature hydrothermal alteration of primary minerals.
