Properties
| Chemical formula | Na₄Si₃Al₃O₁₂Cl |
|---|---|
| Elements | Na, Si, Al, O, Cl |
| Crystal system | Cubic |
| Mohs hardness | 6 |
| Density | — |
| Streak | white |
| Color | — |
| IMA symbol | Sdl |
| Nickel–Strunz class | 9.FB.10 |
“—” means no reliable value in Wikidata yet. Check Mindat for full data.
✺ Glows under UV
| Longwave UV (~365 nm) | Orange (most sodalite) |
|---|---|
| Tenebrescence (colour change) | The hackmanite variety is tenebrescent |
The orange glow comes from sulfur (S₂⁻) in the crystal structure. The same mineral makes Yooperlites glow.
Reactions vary by locality and specimen; many specimens of a fluorescent species do not glow. Shortwave UV can burn skin and damage eyes. Wear UV-blocking glasses, and never look into any UV lamp. Sources: Wikipedia: Sodalite. More UV-reactive stones →
🌍 Where it's found
Type locality (where it was first described): Ilimmaasaq, Greenland
- Type locality
- Notable source / deposit
- Country of origin
Marker positions are approximate (region or locality level). Type localities from Wikidata; notable sources curated by Crystopedia.
Varieties & related stones
✨ Metaphysical & Folklore
These are traditional and folk beliefs from crystal lore. They are not scientific or medical claims – crystals are not a substitute for professional care.
Sodalite is associated with logic, rational thought and calm communication.
Learn more
- Sodalite on Mindat.org
- Wikipedia article
- Wikidata item Q410759 (source of this page's data – you can correct it there)