Properties
| Chemical formula | — |
|---|---|
| Elements | — |
| Crystal system | — |
| Mohs hardness | — |
| Density | — |
| Streak | — |
| Color | — |
“—” means no reliable value in Wikidata yet. Check Mindat for full data.
Learn more
- Derbyshire Blue John on Mindat.org
- Wikipedia article
- Wikidata item Q5261556 (source of this page's data – you can correct it there)
Gem material
Blue
Gemstone