mineral

Orange stilbite (zeolite)

Stilbite-Ca, approximately NaCa₄(Si₂₇Al₉)O₇₂·28H₂O

AI-generated identification · may be incorrect

Peach-orange, pearly to vitreous crystals in a bow-tie/rosette cluster; Mohs hardness 3.5–4, monoclinic structure, perfect cleavage, and specific gravity about 2.1–2.2. Identification from the image is tentative; the specimen may be another zeolite.

Identified October 12, 2026More mineral →

Explore Orange stilbite (zeolite) in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Forms as a low-temperature hydrothermal mineral in cavities of basalt and other volcanic rocks, commonly alongside other zeolites. Such deposits span a wide range of ages, often Cenozoic.

Uses & applications

Primarily collected as a display mineral; zeolites also have industrial uses in adsorption, water treatment, and catalysis, though attractive stilbite specimens are not typically used commercially.

Geological facts

Stilbite crystals commonly form distinctive sheaf-like or bow-tie aggregates, and their hydrated structure can lose water when heated.

Field identification & locations

Look for soft, pearly, bladed crystals arranged in radiating clusters, often lining volcanic-rock cavities. Notable specimens come from India, Iceland, and the eastern United States.