Facts
- Chemical formula
- Al₂OSiO₄
- Crystal system
- Triclinic
- Mohs hardness
- 7.5
- Density
- 3.68 g/cm³
- Number of elements
- 3
- IMA status
- Approved
- Type locality
- Austria
- Named after
- dark blue
Sources: Wikidata (CC0), IMA list of minerals via Wikidata · Wikidata Q193450