Facts
- Chemical formula
- Co²⁺Co³⁺₂Se₄
- Crystal system
- Cubic
- Mohs hardness
- 4.0
- Number of elements
- 2
- IMA status
- Grandfathered
- Type locality
- Trogtal quarries, Lautenthal
- Named after
- Friedrich Wilhelm Conrad Eduard Bornhardt
Sources: Wikidata (CC0), IMA list of minerals via Wikidata · Wikidata Q3642693