Skjærpemyr mine are the most interesting and richest mine in the Grua District.
The area is protected by law and it is not allowed to collect pieces from rock. Hammering and digging is strictly forbidden.
References
-Goldschmidt, V.M. (1911): Die Kontaktmetamorphose im Kristianiagebiet . Videnskapsselskapets Skrifter. 1.Mat.-Naturv. Klasse 1911. No 1. Kristiania (in german)
-Raade, G.(1995): Secondary Zn and Cu minerals from contact deposits of the Oslo region, Norway. Bergverksmuseet Skrift nr 9, 18-26
- Folvik, H. (2005): Mineralene på Skjerpemyr. STEIN 32 (1), 4-9 (in norwegian)
- Folvik, H. O. (2008): Nytt om mineraler. Tre nye mineraler fra Skjerpemyr, Grua. STEIN 35 (1): 16 [find and analysis of hetaerolite, hydrohetaerolite & hydrotungstite]
- Folvik, H.O (2010): En brakiopode fra Skjerpemyr. STEIN 37 (3): 30-31 [on coronadite replacement after a fossil brachiopoda]
Mineral List
44 entries listed. 42 valid minerals.
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