Lindvikskollen feldspar quarry is situated in the western part of the Lindvikskollen-Kalstadgangen pegmatite dike, at the very top of the Mt. Lindvikskollen. The quarry has been abandoned since the early 1930s. See the entry on the Lindvikskollen-Kalstadgangen pegmatite for more information about the pegmatite.
This is the type locality of Hellandite-(Y). Since its discovery in 1903 more than 200 crystals of hellandite-(Y) were collected between 1903-1922 at the dumps of the quarry . The core that hosted the hellandite was already quarried out when Brøgger described Hellandite in 1903.
The pegmatite with its quarries and prospects will now be included in Gea Norvegica, a Geopark.
References:
- Brøgger, W.C. (1922): Neue beobachtungen über die krystallformen des hellandits. in Brøgger, W.C, Vogt, Th. & Schetelig, J. (1922): Die Mineralien der südnorwegischen Granitpegmatitgänge. II. Silikate der seltenen Erde. Videnskapsselskapets Skrifter. I.Mat-Naturv. Klasse 1922. 11, 3-16 + plates I-IV
- Green, J.C.(1956): Geology of the Storkollen-Blankenberg area, Kragerø, Norway. Norsk Geologisk Tidsskrift 36, 89-140
- Kristiansen, Roy (1993): Caysichitt-(Y) og Chernovitt-(Y) fra Lindvikskollen, Kragerø; to nye mineraler for Norge. STEIN 20 (2), 125-128
