$250Median
3Sold (12 mo)
$1,125Last sale
Epistilbite
4 in the gallery
Epistilbite is a hydrated calcium aluminum silicate that forms as clear to pale pink to colorless crystals in tabular or bladed habits. Individual crystals typically exhibit a translucent to pearly luster and can be accompanied by a vitreous sheen on fresh surfaces. The mineral commonly crystallizes in low-temperature environments, often associated with zeolite-rich oresite and volcanic rocks, with notable specimens reported from India, Iceland, Japan, and Namibia. Collectors prize its delicate forms, subtle color variations, and the way the thin, prismatic crystals can form compact aggregates that capture light from multiple angles.
- Formula
- CaAl2Si6O16 · 5H2O
- Rarity
- Common
- Stability
- Stable
- Collector interest
- Moderate Interest
- Classification notes
- Zeolite group, framework silicate (tectosilicate); Strunz 9.G
Where Epistilbite is found
Top localities
- Nashik3 specimens
- Maharashtra1 specimen
About Epistilbite
Because epistilbite tends to occur in networks of tiny, well-formed crystals, it can present attractive micro-crystal assortments suitable for cabinet display. Specimens from classic zeolite associations are especially desirable for their combination of color, habit, and provenance, making epistilbite a favored species for experienced collectors who value locality and crystal morphology. In collections, it serves as a reference for hydration- and structure-related crystal chemistry within zeolite group minerals.
