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(Al9Si27O72)·30H2O
This specimen features radiating, sheaf-like aggregates of pale orange to white stilbite crystals, often forming bow-tie or fan shapes. These are intergrown with sharp, colorless to white tabular apophyllite crystals.
Stilbite Physical Properties
Mohs Hardness
3.5Crystal System
monoclinicLuster
vitreousStreak Color
whiteCleavage
perfect on {010}Fracture
unevenSpecific Gravity
2.15Colors
white, pale orange, pink, yellow, brownTransparency
transparentType Locality
Jalgaon District, Maharashtra, IndiaMineral Group
Silicates (Zeolite Group)Uses
collector, industrial (adsorbent, catalyst, ion exchange)Associated Minerals
apophyllite-(KF), calcite, quartz, other zeolitesRarity
commonGeological Context
Stilbite is a common zeolite mineral typically found in the amygdaloidal cavities of basaltic volcanic rocks, forming as a secondary mineral from the alteration of primary silicates. It can also occur in some metamorphic and hydrothermal environments.
