Situated about 2 km W of the town Kragerø. A large granite pegmatite body hosted in amphibolites and albitites ("kragerødite"). The main part of the pegmatite forms a dike about 500 m in length and 3o m wide.
The pegmatite is a Ca-Ti-B-Y rich pegmatite and can be classified as a NYF pegmatite.
The pegmatite has been quarried extensively along its length. 2 of the most famous prospects/quarries are the Lindvikskollen quarry and Kalstadgangen. These are famous for their rare minerals. Mineral samples from these two are frequently just labelled "Lindvikskollen". The pegmatite with its quarries and prospects will now be included in Gea Norvegica, a Geopark.
Ref:
- Bjørlykke, H. (1937): Mineral parageneses of some granite pegmatites near Kragerø, Southern Norway. Norsk Geologisk Tidsskrift 17, 1-16.
- Green, J.C.(1956): Geology of the Storkollen-Blankenberg area, Kragerø, Norway. Norsk Geologisk Tidsskrift 36, 89-140 + plate I
- Kristiansen, Roy (1993): Caysichitt-(Y) og Chernovitt-(Y) fra Lindvikskollen, Kragerø; to nye mineraler for Norge. STEIN 20 (2), 125-128
