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Case beryl prospects (Case quarries), Portland, Middlesex Co., Connecticut, USA

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Granite pegmatites.




Group 2 - Sulphides and Sulfosalts
  		• Bismuthinite2.DB.05
    Bi
     
    2
    		S
     
    3
  		• Chalcopyrite2.CB.10a
    CuFeS
     
    2
  		• Cuprobismutite2.JA.10a
    Cu
     
    10
    		Bi
     
    12
    		S
     
    23
  		• Pyrite2.EB.05a
    FeS
     
    2
    Group 4 - Oxides and Hydroxides
  		• Bismite4.CB.60
    Bi
     
    2
    		O
     
    3
  		• Columbite-(Fe)4.DB.35
    FeNb
     
    2
    		O
     
    6
  		• Goethite4.FD.10
    α-Fe
    3+
     
    		O(OH)
  		• Liandratite4.DH.35
    U(Nb,Ta)
     
    2
    		O
     
    8
  		• Opal4.DA.10
    SiO
     
    2
    		·nH
     
    2
    		O
      var: Opal-AN4.DA.10
    SiO
     
    2
    		·nH
     
    2
    		O
  		• Petscheckite ?4.DH.35
    UFe(Nb,Ta)
     
    2
    		O
     
    8
  		• Pyrolusite ?4.DB.05
    MnO
     
    2
  		• Quartz4.DA.05
    SiO
     
    2
      var: Milky Quartz4.DA.05
    SiO
     
    2
      var: Smoky Quartz4.DA.05
    SiO
     
    2
  		• Samarskite-(Y)4.DB.25
    (Y,Fe
    3+
     
    		,Fe
    2+
     
    		,U,Th,Ca)
     
    2
    		(Nb,Ta)
     
    2
    		O
     
    8
  		• Uraninite4.DL.05
    UO
     
    2
  		• Uranpyrochlore4.DH.15
    (U,Ca,Ce)
     
    2
    		(Nb,Ta)
     
    2
    		O
     
    6
    		(OH,F)
    Group 5 - Nitrates and Carbonates
  		• Bismutite5.BE.25
    (BiO)
     
    2
    		CO
     
    3
    Group 8 - Phosphates, Arsenates and Vanadates
  		• Apatite-(CaF)8.BN.05
    Ca
     
    5
    		[F|(PO
     
    4
    		)
     
    3
    		]
      var: Mn-bearing Apatite-(CaF)8.BN.05
    (Ca,Mn
    2+
     
    		)
     
    5
    		(PO
     
    4
    		)
     
    3
    		(F,Cl,OH) or Ca
     
    5
    		([P,Mn
    3+
     
    		]O
     
    4
    		)
     
    3
    		(F,Cl,OH)
  		• Autunite8.EB.05
    Ca(UO
     
    2
    		)
     
    2
    		(PO
     
    4
    		)
     
    2
    		·11H
     
    2
    		O
  		• Monazite-(Ce)8.AD.50
    (Ce,La,Nd,Th)PO
     
    4
  		• Phosphuranylite8.EC.10
    (H
     
    3
    		O)
     
    3
    		KCa(UO
     
    2
    		)
     
    7
    		[O|PO
     
    4
    		]
     
    4
    		 · 8H
     
    2
    		O
  		• Torbernite8.EB.05
    Cu(UO
     
    2
    		)
     
    2
    		(PO
     
    4
    		)
     
    2
    		·12H
     
    2
    		O
    Group 9 - Silicates
  		• Albite9.FA.35
    Na[AlSi
     
    3
    		O
     
    8
    		]
  		• Almandine9.AD.25
    Fe
    2+
    3
    		Al
     
    2
    		[SiO
     
    4
    		]
     
    3
  		• Beryl9.CJ.05
    Be
     
    3
    		Al
     
    2
    		Si
     
    6
    		O
     
    18
      var: Aquamarine9.CJ.05
    Be
     
    3
    		Al
     
    2
    		Si
     
    6
    		O
     
    18
      var: Heliodor9.CJ.05
    Be
     
    3
    		Al
     
    2
    		Si
     
    6
    		O
     
    18
  		• Biotite9..
  		• Bismutoferrite9.ED.25
    Fe
    3+
    2
    		Bi[OH|(SiO
     
    4
    		)
     
    2
    		]
  		• Epidote9.BG.05
    {Ca
     
    2
    		}{Al
     
    2
    		Fe
    3+
     
    		}[O|OH|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
  		• Microcline9.FA.30
    K[AlSi
     
    3
    		O
     
    8
    		]
  		• Muscovite9.EC.15
    KAl
     
    2
    		[(OH)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
  		• Orthoclase ?9.FA.30
    K[AlSi
     
    3
    		O
     
    8
    		]
  		• Schorl9.CK.05
    [Na][Fe
    2+
    3
    		][Al
     
    6
    		][(OH)
     
    3
    		|OH|(BO
     
    3
    		)
     
    3
    		|Si
     
    6
    		O
     
    18
    		]
  		• Spessartine9.AD.25
    Mn
    2+
    3
    		Al
     
    2
    		[SiO
     
    4
    		]
     
    3
  		• Thorogummite9.AD.30
    (Th,U)[(OH)
     
    4x
    		|(SiO
     
    4
    		)
     
    1-x
    		]
  		• Uranophane9.AK.15
    Ca(UO
     
    2
    		)
     
    2
    		[HSiO
     
    4
    		]
     
    2
    		 · 5H
     
    2
    		O
  		• Zircon9.AD.30
    Zr[SiO
     
    4
    		]
      var: Cyrtolite9.AD.30
    Zr[(SiO
     
    4
    		),(OH)
     
    4
    		]
    Unclassified Minerals
  		• 'Gummite'-
  		• 'Hornblende'-
  		• Limonite-
    FeO(OH)·nH
     
    2
    		O
  		• 'Manganese Oxides
    var: Manganese Dendrites'    		-
  		• 'Perthite'-
  		• Tantalite ?-
    (Fe,Mn)(Ta,Nb)
     
    2
    		O
     
    6


    48 entries listed. 40 valid minerals. 2 erroneous literature entries.

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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Jobs in Connecticut, USA 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: 4th Nov 2009 18:24:49