(Kjølsrød, Bjørkedalen, Porsgrunn, Telemark, Norge)
The locality consists of pegmatites in roadcuts on both sides of the railway crossing at Kjølsrød, Bjørkedalen near the city of Porsgrunn in the border-zone of the alkaline province of the Larvik-Langesundsfjord area. Very interesting material was available during a road-work period in 1996.