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Genthelvite from
Bratthagen 1, Lågendalen, Hedrum, Larvik, Vestfold, Norway

Locality type:Road Cutting
Classification
Species:Genthelvite
Formula:Be3Zn4(SiO4)3S
Comments:The genthelvite shows a faint phosphorescence after being UV-irradiated
Habit:tetrahedra up to 10 mm; masses
Colour:colorless to light greenish;
Luminescent properties:strong yellow (Oftedahl & Sæbø) ; bright green in long-and shortwave (Larsen (1988)
Confirmation
Validity:Believed Valid
References
References:Oftedal, I. & Sæbø, P.Chr. (1963): Contributions to the mineralogy of Norway No.18. Classification of some Norwegian members of the Helvine group. Norsk Geologisk Tidsskrift 43, 405-409;Larsen, A. O. (1988): Helvite group minerals from syenite pegmatites in the Oslo Region, Norway. Contribution to the mineralogy of Norway no 68. Norsk Geologisk Tidsskrift 68: 119-124
Data
Mineral Data:Click here to view Genthelvite data
Locality Data:Click here to view Bratthagen 1, Lågendalen, Hedrum, Larvik, Vestfold, Norway
Nearest other occurrences of Genthelvite
21.2km (13.2 miles) Zircon prospect, Stokkøya, Langesundsfjorden, Larvik, Vestfold, Norway
 
Mineral and/or Locality  
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