Vevja quarry was previously one of the most rewarding larvikite quarries in the Tvedalen area, despite its relatively small size. Several pegmatites were exposed; one which produced a large number of chiavennite specimens. The quarry was closed down in 1984.
References:
- Kamphaug, E. (1987): Wikmanitt (sic!) fra Vevja-bruddet i Tvedalen. NAGS-nytt 14 (4),27.
- Larsen, A. O. (1988): Helvite group minerals from syenite pegmatites in the Oslo Region, Norway. Contribution to the mineralogy of Norway no 68. Norsk Geologisk Tidsskrift 68: 119-124 [with analysis of helvite from Vevja 1)
- Engvoldsen, T., Andersen, F., Berge, S. A. & Burvald, I. (1991): Pegmatittmineraler fra Larvik ringkompleks. STEIN 18 (1), 15-71
- Larsen, A. O.; Åsheim, A.; Raade, G. & Taftø, J. (1992): Tvedalite, (Ca,Mn)4Be3Si6O17(OH)4•3H2O, a new mineral from syenite pegmatite in the Oslo Region, Norway, American Mineralogist 77, 438-443
Mineral List:37 entries listed. 35 valid minerals. 1 type locality (valid mineral).
The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database!
