Properties
| Chemical formula | Pb(Ca,Mn²⁺)₂(Si₃O₉) |
|---|---|
| Elements | Pb, Ca, Mn, Si, O |
| Crystal system | — |
| Mohs hardness | — |
| Density | — |
| Streak | — |
| Color | — |
| IMA symbol | Mga |
| Nickel–Strunz class | 9.CA.25 |
“—” means no reliable value in Wikidata yet. Check Mindat for full data.
✺ Glows under UV
| Longwave UV (~365 nm) | Weak red to orange |
|---|---|
| Midwave UV (~310 nm) | Red to orange |
| Shortwave UV (~254 nm) | Bright blue (also red) |
Found only at Franklin, New Jersey.
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 →
🌍 Where it's found
Type locality (where it was first described): Parker shaft, United States
Learn more
- Margarosanite on Mindat.org
- Wikidata item Q3846912 (source of this page's data – you can correct it there)
IMA mineral species
LongwaveMidwaveShortwaveUV reactive