Facts
- Chemical formula
- (Mn²⁺,Ca)₃(Fe³⁺,Al)₂(SiO₄)₃
- Crystal system
- Cubic
- Mohs hardness
- 7.0
- Number of elements
- 6
- IMA status
- Grandfathered
- Named after
- James Calder
- Discovered
- 1952
Sources: Wikidata (CC0), IMA list of minerals via Wikidata · Wikidata Q429522