Properties
| Category | Tectosilicate minerals |
|---|---|
| Formula | Na2Al2Si3O10·2H2O |
| Crystal system | Orthorhombic |
| Color | White, colorless, sometimes pink |
| Crystal habit | Acicular |
| Cleavage | Perfect on {110} |
| Fracture | Irregular, uneven |
| Tenacity | Brittle |
| Mohs scale hardness | 5–6 |
| Luster | Vitreous, silky, pearly |
| Streak | White |
| Diaphaneity | Transparent to translucent |
| Specific gravity | 2.25 |
From the Wikipedia article
Natrolite is a tectosilicate mineral species belonging to the zeolite group. It is a hydrated sodium and aluminium silicate with the formula Na2Al2Si3O10·2H2O. The type locality is Hohentwiel, Hegau, Germany.
Source
Source record: crystal-compendium/natrolite/minerals.json. Fetched from English Wikipedia by the operator 2 October 2026.
https://en.wikipedia.org/wiki/Natrolite — revision id 1331288692. Text and properties from Wikipedia, licensed CC BY-SA 4.0.