IMA mineral species ✺ Glows under UV
Wollastonite
CaSiO₃
Single chain inosilicate mineral; polytypes: 1A, 3A, 4A, 5A, 7A, 1T.
Properties
⚖ Density2.903 g/cm³
Average
🔷 Triclinic✏️ streak white
| Chemical formula | CaSiO₃ |
|---|---|
| Elements | Ca, Si, O |
| Crystal system | Triclinic |
| Mohs hardness | — |
| Density | 2.903 g/cm³ |
| Streak | white |
| Color | — |
| IMA symbol | Wo |
| Nickel–Strunz class | 9.DG.05 |
“—” means no reliable value in Wikidata yet. Check Mindat for full data.
✺ Glows under UV
| Shortwave UV (~254 nm) | Bright to moderate orange to yellow (best under shortwave) |
|---|---|
| Phosphorescence (afterglow) | Phosphorescence is often redder than the fluorescence |
These responses are for Franklin and Sterling Hill material.
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: Franklin Mineral Museum fluorescent mineral checklist. More UV-reactive stones →
Learn more
- Wollastonite on Mindat.org
- Wikipedia article
- Wikidata item Q423018 (source of this page's data – you can correct it there)
IMA mineral species
Triclinic
GrayWhite & Clear
ShortwavePhosphorescentUV reactive