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)
monocliniccommonSilicates (Zeolite Group)
Stilbite
NaCa4(Si27Al9)O72·28H2O
This specimen features radiating, sheaf-like aggregates of peach to orange-colored stilbite crystals, often exhibiting a pearly luster, growing on a matrix that includes chalcedony.
Stilbite Physical Properties
Mohs Hardness
3.5Crystal System
monoclinicLuster
vitreousStreak Color
whiteCleavage
perfect on {010}Fracture
unevenSpecific Gravity
2.18Colors
white, colorless, pink, salmon, orange, brown, red, yellowTransparency
transparentType Locality
Jalgaon District, Maharashtra, IndiaMineral Group
Silicates (Zeolite Group)Uses
collector, molecular sieves, ion exchangeAssociated Minerals
quartz, chalcedony, apophyllite, heulandite, calciteRarity
commonGeological Context
Stilbite is a common zeolite mineral that forms as a secondary mineral in the amygdaloidal cavities and veins of basaltic volcanic rocks, as well as in some metamorphic and hydrothermal environments.
