Properties
| Chemical formula | Na₄BeAlSi₄O₁₂Cl |
|---|---|
| Elements | Na, Be, Al, Si, O, Cl |
| Crystal system | Tetragonal |
| Mohs hardness | 4 |
| Density | 2.36 – 2.57 g/cm³ |
| Streak | — |
| Color | — |
| IMA symbol | Ttp |
| 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 to red or crimson |
|---|---|
| Midwave UV (~310 nm) | Pink to orange |
| Shortwave UV (~254 nm) | Orange-red, pinkish or yellowish white |
| Tenebrescence (colour change) | Tenebrescent: its pink deepens toward crimson after UV or sunlight and fades again in the dark |
A rare beryllium mineral from the Ilímaussaq complex in Greenland, related to sodalite.
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: Tugtupite · fluomin.org: Tugtupite. More UV-reactive stones →
🌍 Where it's found
Type locality (where it was first described): Tunulliarfik fjord, 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.
Learn more
- Tugtupite on Mindat.org
- Wikipedia article
- Wikidata item Q415135 (source of this page's data – you can correct it there)
IMA mineral species
4–5
Tetragonal
RedGreenBluePinkWhite & Clear
LongwaveMidwaveShortwaveTenebrescentUV reactive