Sodalite
Na4Al3Si3O12Cl
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Sodalite is a royal-blue tectosilicate mineral named for its sodium content. It is widely used as an ornamental gemstone. Unlike the similarly colored lapis lazuli, sodalite rarely contains pyrite and its blue color is more even and uniform.
| Crystal System | Cubic (Isometric) |
| Mineral Class | 09 Silicates |
| Mohs Hardness | 5.5-6.0 |
| Specific Gravity | 2.14-2.40 |
| Color | Rich royal blue, violet-blue, gray, white |
| Luster | Vitreous |
| Streak | White |
| Cleavage | Poor {110} |
| Fracture | Conchoidal to uneven |
| Transparency | Translucent |
| Crystal Habit | Massive, dodecahedral (rare) |
Mohs Hardness
Mohs Hardness: 5.5 – 6.0
1 Soft10 Hard
Crystal System
Cubic (Isometric)Frequently Asked Questions
What is the hardness of Sodalite?
Sodalite has a Mohs hardness of 5.5-6.0.
What crystal system does Sodalite belong to?
Sodalite crystallizes in the Cubic (Isometric) crystal system.
What color is Sodalite?
Sodalite is typically Rich royal blue, violet-blue, gray, white.
What type of luster does Sodalite have?
Sodalite exhibits a Vitreous luster.
What is the chemical formula of Sodalite?
The chemical formula of Sodalite is Na4Al3Si3O12Cl.