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Ula pegmatite, Ula, Tjølling, Larvik, Vestfold, Norway

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The syenite pegmatite locality at Ula became known in the late 1880s because of its occurrence of beautifully schillerising feldspar. The Ula locality includes several pegmatite dikes, one of which is the classic "moonstone" locality. The main mineral in the syenite pegmatites at Ula is a grey cryptoperthite which occurs in individuals up to 20 cm long and often shows sky-blue to greenish yellow schillerising colours. The main locality was protected by law in 1980.

Ref.:
http://home.c2i.net/aolarsen/Pegmatites.htm





 Map Reference: 59°1'0"N , 10°11'60"E

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Mineral List:
  		•  Apatite-(CaF)
    Ca
     
    5
    		[F|(PO
     
    4
    		)
     
    3
    		]
    Reference: []
  		•  Bastnäsite-(Ce)
    (Ce,La)[F|CO
     
    3
    		]
    Reference: [Pers.com Knut Edv. Larsen 2008]
  		•  'Feldspar Group'
    Reference: []
  		•  Magnesiohastingsite
    Na[Ca
     
    2
    		][Mg
     
    4
    		Fe
    3+
     
    		][(OH)
     
    2
    		|Al
     
    2
    		Si
     
    6
    		O
     
    22
    		]
    Reference: []
  		•  Magnetite
    Fe
    2+
     
    		Fe
    3+
    2
    		O
     
    4
    Reference: []
  		•  'Moonstone'
    Description: "moonstone" is in this locality the name for schillerising kryptoperthite (microcline/albite)
    Reference: [Berge, S. A. (1978): Månestein. NAGS-nytt 5 (1),9-10]
  		•  'Perthite
    var: Cryptoperthite'
    Reference: []
  		•  Pyrochlore
    (Ca,Na)
     
    2
    		Nb
     
    2
    		O
     
    6
    		(OH,F)
    Reference: []
  		•  Zircon
    Zr[SiO
     
    4
    		]
    Reference: []


    9 entries listed. 6 valid minerals.

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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 13th Nov 2009 06:08:42