Natrolite
| Colour | White, Clear |
|---|---|
| Mohs hardness | 5–6 |
| Lustre | Vitreous, silky, pearly |
| Streak | White |
| Crystal system | Orthorhombic |
| Transparency | Transparent to translucent |
| Cleavage | Perfect on {110} |
| Fracture | Irregular, uneven |
| Specific gravity | 2.25 |
What is Natrolite?
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.
How to identify Natrolite
- Lustre: Vitreous, silky, pearly.
- Hardness: Mohs 5–6 — about as hard as a steel knife.
- Streak: White.
- Habit: Orthorhombic crystal system.
Natrolite in different forms
Stones often confused with Natrolite
Frequently asked questions
How hard is Natrolite?
Natrolite is Mohs 5–6 on the hardness scale.
What colour is Natrolite?
Natrolite is typically white, clear (White, colorless, sometimes pink).