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Delaware, USA

StandardDetailedBy ChemistryMineral Photos (16)Search GoogleMineral Report for Region

One of the thirteen original states of the USA.




Mineral list contains entries from the region specified including sub-localities


Mineral List:
  		•  Albite
    var: Oligoclase
    (Na,Ca)[Al(Si,Al)Si
     
    2
    		O
     
    8
    		]
    Reference: [ Yale Peabody Museum]
  		•  'Albite-Anorthite Series'
    Reference: [Delaware Geological Survey]
  		•  Almandine ?
    Fe
    2+
    3
    		Al
     
    2
    		[SiO
     
    4
    		]
     
    3
    Habit: crude dodecahedral
    Colour: very dark red/black
    Fluorescence: none
    Description: From my personal mineral experience and my specimens from this site, the garnets appear to be almandine. Small crystals are considered rare and a lucky find, so these large crystals (up to over 1") are probably the best from the locale.
    Reference: ["Arthur Koch - collection"]
    Site Photo
    Woodlawn Quarry, Wilmington, New Castle Co., Delaware, USA
    © Arthur Koch
  		•  'Amber'
    Reference: [World of Amber]
  		•  'Apatite'
    Reference: [ Yale Peabody Museum]
    Site Photo
    Brandywine Springs, New Castle Co., Delaware, USA
    © Jake Slagle
  		•  Apatite-(CaF)
    Ca
     
    5
    		[F|(PO
     
    4
    		)
     
    3
    		]
    Reference: [Rocks & Min.:11:216; 21:280-281; AmMin:9(1924):1-5.]
  		•  Apatite-(CaF)
    var: Mn-bearing Apatite-(CaF)
    (Ca,Mn
    2+
     
    		)
     
    5
    		(PO
     
    4
    		)
     
    3
    		(F,Cl,OH) or Ca
     
    5
    		([P,Mn
    3+
     
    		]O
     
    4
    		)
     
    3
    		(F,Cl,OH)
    Reference: [Dana (1893) Textbook of Mineralogy 17th ed. ]
  		•  'Asbestos'
    Reference: [Dana 6:1070.]
  		•  Beryl
    Be
     
    3
    		Al
     
    2
    		Si
     
    6
    		O
     
    18
    Reference: [Delaware Geological Survey Collection]
    Site Photo
    West Branch pegmatite, Newark, New Castle Co., Delaware, USA
    © Jake Slagle
  		•  Beryl
    var: Aquamarine
    Be
     
    3
    		Al
     
    2
    		Si
     
    6
    		O
     
    18
    Reference: [Delaware Geological Survey]
  		•  Biotite
    Reference: [Rocks & Min.: 21:280-281.]
  		•  Bornite
    Cu
     
    5
    		FeS
     
    4
    Reference: [Rocks & Min.:11:216; 21:280-281; AmMin:9(1924):1-5.]
  		•  Calcite
    CaCO
     
    3
    Reference: [Rocks & Min.:11:216; 21:280-281; AmMin:9(1924):1-5.]
  		•  'Chabazite'
    Reference: [Rocks & Min.:11:216; 21:280-281; AmMin:9(1924):1-5.]
    Site Photo
    Brandywine Quarry (Hubbard Quarry), Wilmington, New Castle Co., Delaware, USA
    © Jake Slagle
  		•  Chalcocite
    Cu
     
    2
    		S
    Reference: [Rocks & Min.:11:216; 21:280-281; AmMin:9(1924):1-5.]
  		•  Chalcopyrite
    CuFeS
     
    2
    Reference: [Rocks & Min.:11:216; 21:280-281; AmMin:9(1924):1-5.]
  		•  'Chlorite Group'
    Reference: [Rocks & Min.: 21:280-281.]
  		•  Chrysotile
    Mg
     
    3
    		Si
     
    2
    		O
     
    5
    		(OH)
     
    4
    Reference: [Dana 6:1070.]
  		•  Corundum
    Al
     
    2
    		O
     
    3
    Reference: [Gems and Minerals of America- Jay Ellis Ransom-1974]
  		•  'Deweylite'
    Mg
     
    4
    		Si
     
    3
    		O
     
    10
    		·6H
     
    2
    		O ?
    Reference: [Dana 6: 1070.]
  		•  Diopside
    CaMg[Si
     
    2
    		O
     
    6
    		]
    Reference: [Dana 6: 1070.]
  		•  Enstatite
    Mg
     
    2
    		[SiO
     
    3
    		]
     
    2
    Reference: [Dana 6:1070.]
  		•  'Feldspar Group'
    Reference: [Dana 6: 1070.]
  		•  'Garnet Group'
    X
     
    3
    		Z
     
    2
    		(TO
     
    4
    		)
     
    3
    		 (X = Ca, Fe, etc·, Z = Al, Cr, etc·, T = Si, As, V)
    Reference: [Dana 6:1070.]
  		•  Glauconite
    K
     
    0.08
    		R
    1
    1.33
    		 R
    2
    0.67
    		 [][Al
     
    0.13
    		Si
     
    3.87
    		O
     
    10
    		](OH)
     
    2
    Reference: [Dana 6: 1070.]
  		•  Grossular
    Ca
     
    3
    		Al
     
    2
    		[SiO
     
    4
    		]
     
    3
    Reference: [Dana 6:446.]
    Site Photo
    New Castle Co., Delaware, USA
    © Dan & Diana Weinrich Minerals
  		•  Hisingerite
    Fe
    3+
    2
    		Si
     
    2
    		O
     
    5
    		(OH)
     
    4
    		·2H
     
    2
    		O
    Reference: [Rocks & Min.:11:216; 21:280-281; AmMin:9(1924):1-5.]
  		•  'Hornblende'
    Reference: [Dana 6: 1070.]
  		•  Kyanite
    Al
     
    2
    		[O|SiO
     
    4
    		]
    Reference: [Dana 6:1070.]
  		•  Laumontite
    CaAl
     
    2
    		Si
     
    4
    		O
     
    12
    		·4H
     
    2
    		O
    Reference: [Rocks & Min.:11:216; 21:280-281; AmMin:9(1924):1-5.]
  		•  Limonite
    FeO(OH)·nH
     
    2
    		O
    Reference: [Dana 6:1070.]
  		•  Magnesite
    MgCO
     
    3
    Reference: [Dana 6:1070.]
  		•  Magnetite
    Fe
    2+
     
    		Fe
    3+
    2
    		O
     
    4
    Reference: [Rob Lavinsky specimen]
    Site Photo
    Beaver Valley (Chandler's Hollow), New Castle Co., Delaware, USA
    © Jake Slagle
  		•  Malachite
    Cu
     
    2
    		[(OH)
     
    2
    		|CO
     
    3
    		]
    Reference: [Univ. of DE Irnee duPont Mineral Museum specimen]
  		•  Marcasite
    FeS
     
    2
    Reference: [Rocks & Min.:11:216; 21:280-281; AmMin:9(1924):1-5.]
  		•  'Mica Group'
    Reference: [Dana 6: 1070.]
  		•  Microcline
    K[AlSi
     
    3
    		O
     
    8
    		]
    Reference: [Delaware Geological Survey (2000) Report of Investigations No. 59]
  		•  Muscovite
    KAl
     
    2
    		[(OH)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
    Reference: [Delaware Geological Survey Collection]
    Site Photo
    Beaver Valley (Chandler's Hollow), New Castle Co., Delaware, USA
    © Rob Lavinsky
  		•  Natrolite
    Na
     
    2
    		[Al
     
    2
    		Si
     
    3
    		O
     
    10
    		] · 2H
     
    2
    		O
    Reference: [Rocks & Min.:11:216; 21:280-281; AmMin:9(1924):1-5.]
  		•  'Ochre'
    Reference: [Gems and Minerals of America- Jay Ellis Ransom-1974]
  		•  Orthoclase
    K[AlSi
     
    3
    		O
     
    8
    		]
    Reference: [Rocks & Min.: 21:280-281.]
  		•  Pyrite
    FeS
     
    2
    Reference: [Rocks & Min.:11:216; 21:280-281; AmMin:9(1924):1-5.]
  		•  Pyrrhotite
    Fe
     
    7
    		S
     
    8
    		, (-4M), also given as Fe
     
    1-x
    		S (x = 0 - 0.2)
    Reference: [Rocks & Min.:11:216; 21:280-281; AmMin:9(1924):1-5.]
  		•  Quartz
    SiO
     
    2
    Reference: [Delaware Geological Survey (2000) Report of Investigations No. 59]
  		•  Quartz
    var: Smoky Quartz
    SiO
     
    2
    Reference: [Rocks & Min.: 21:280.]
  		•  Schorl
    [Na][Fe
    2+
    3
    		][Al
     
    6
    		][(OH)
     
    3
    		|OH|(BO
     
    3
    		)
     
    3
    		|Si
     
    6
    		O
     
    18
    		]
    Reference: [Delaware Geological Survey (2000) Report of Investigations No. 59]
    Site Photo
    West Branch pegmatite, Newark, New Castle Co., Delaware, USA
    © Stephen E. Fritz
  		•  'Serpentine Group'
    D
     
    2
    		[Si
     
    2
    		O
     
    5
    		](OH)4 + or - nH
     
    2
    		O
    Reference: [Gems and Minerals of America- Jay Ellis Ransom-1974]
  		•  Sillimanite
    Al
     
    2
    		[O|SiO
     
    4
    		]
    Reference: [www.excaliburmineral.com]
    Site Photo
    Brandywine Springs, New Castle Co., Delaware, USA
    © 2009, JGW
  		•  Spessartine
    Mn
    2+
    3
    		Al
     
    2
    		[SiO
     
    4
    		]
     
    3
    Reference: [Delaware Geological Survey Collection]
  		•  'Stilbite'
    Reference: [Rocks & Min.:11:216; 21:280-281; AmMin:9(1924):1-5.]
  		•  'Tourmaline'
    AD
     
    3
    		G
     
    6
    		(BO
     
    3
    		)
     
    3
    		[T
     
    6
    		O
     
    18
    		]Y
     
    3
    		Z
    Reference: [Dana 6: 1070.]
    Site Photo
    West Branch pegmatite, Newark, New Castle Co., Delaware, USA
    © Jake Slagle
  		•  Tremolite
    ☐[Ca
     
    2
    		][Mg
     
    5
    		][(OH)
     
    2
    		|Si
     
    8
    		O
     
    22
    		]
    Reference: [Dana 6:1070.]
  		•  Vivianite
    Fe
    2+
    3
    		(PO
     
    4
    		)
     
    2
    		·8H
     
    2
    		O
    Reference: [Dana, E.S. (1892) System of Mineralogy, 6th. Edition, New York: 1070; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 745.]


    53 entries listed. 32 valid minerals.

    Localities in this Region:
    USA
     
    • Delaware
        • Centerville (Centreville)
        • Middletown
          • Chestnut Hill
        • Wooddale

    The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database!
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Jobs in Delaware, 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: 24th Nov 2009 09:25:10