Quarry for a pale blue kyanite-quartzite rock used as facing stone. Belongs to the same deformation zone as Västanå, Skåne and Hökensås, Västergötland.
Ref: - Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 851, 910, 1006.
- Geologiska Föeningens I Stockholm. Förhandlinger, Stockholm (1990): 112: 9-18.
- Grensman, F.(1989):" Hålsjøberg- En fyndortsbeskrivning." NAGS-nytt: 16(3): 24-27.