![Stilbite (Stilbite-Ca (NaCa4Mg[Al9Si27O72]·28H2O)) — mineral](https://media.rockidentification.com/f6fb15cb-40ca-4b51-812b-16b9bb47a8b3-compressed.jpg)
mineral
Stilbite
Stilbite-Ca (NaCa4Mg[Al9Si27O72]·28H2O)
AI-generated identification · may be incorrectHardness: 3.5-4 (Mohs); Color: Pale pink, peach, or white; Luster: Pearly to vitreous; Crystal Structure: Monoclinic; Cleavage: Perfect on {010}; Specific Gravity: 2.1-2.2
- Hardness
- 3
- Color
- Pale pink, peach, or white
- Luster
- Pearly to vitreous
Identified More mineral →
Explore Stilbite in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 3.5-4 (Mohs); Color: Pale pink, peach, or white; Luster: Pearly to vitreous; Crystal Structure: Monoclinic; Cleavage: Perfect on {010}; Specific Gravity: 2.1-2.2
Formation & geological history
Formed in low-grade metamorphic environments or as a secondary mineral in the cavities (vesicles) of volcanic rocks like basalt. These specimens typically formed during the Cenozoic era via hydrothermal activity.
Uses & applications
Primarily sought by mineral collectors for its unique 'bowtie' leaf-like crystal habits and aesthetic colors. Industrially used as a molecular sieve and in water softening (zeolite group).
Geological facts
Stilbite is part of the Zeolite group; its name comes from the Greek word 'stilbein,' meaning 'to shine,' referring to its pearly luster. Large, high-quality peach-colored specimens often come from the Deccan Traps in India.
Field identification & locations
Identify by its distinctive salmon or peach color and 'sheaf-like' or 'bowtie' crystal aggregates. It is commonly found in the basalt quarries of Maharashtra, India, and Iceland. In the field, look for it alongside other zeolites like Heulandite or Apophyllite.
