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Tourmaline from
Byrud Emerald Mines, Minnesund, Eidsvoll, Akershus, Norway

Locality type:Mine
Classification
Species:'Tourmaline' (not an IMA approved species)
Formula:A(D3)G6(Si6O18)(BO3)3X3Z
Comments:A XRD of a green mineral showed "tourmaline". Analysis done at NHM, Oslo (L.O.Kvamsdal info 16.03.2016).
Colour:Green
Confirmation
Validity:Believed Valid
References
References:Kvamsdal, L.O., Eldjarn, K. (2006): Mineralene i smaragdgruvene ved Byrud gård, Minnesund, Norge. STEIN 33 (4), 4-20.; Nordrum, F.S., Raade, G. (2006): The emerald deposit at Byrud, Eidsvoll, S. Norway. Norsk Bergverkmuseums Skrift. 33, 9-16
Data
Mineral Data:Click here to view Tourmaline data
Locality Data:Click here to view Byrud Emerald Mines, Minnesund, Eidsvoll, Akershus, Norway
Nearest other occurrences of Tourmaline
80.5km (50.0 miles) Spro pegmatite, Nesodden, Akershus, Norway
81.8km (50.8 miles) Vardåsen Tunnel, Asker, Akershus, Norway
83.1km (51.6 miles) Øvre Dypingdal Mine, Dypingdal serpentine-magnesite deposit, Snarum, Modum, Buskerud, Norway
85.5km (53.1 miles) Øksne Quarry, Lier, Buskerud, Norway
91.7km (57.0 miles) Øvre Lahell Quarry, Lier, Buskerud, Norway
93.1km (57.8 miles) Sætersberg (Sätersberg), Modum, Buskerud, Norway
97.5km (60.6 miles) Solbergmoen, Nedre Eiker, Buskerud, Norway
97.8km (60.8 miles) Batteriet, Nedre Eiker Church, Nedre Eiker, Buskerud, Norway
98.0km (60.9 miles) Ryggkollen, Nedre Eiker, Buskerud, Norway
 
Mineral and/or Locality  
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