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Skagit Co., Washington, USA

StandardDetailedBy ChemistryMineral Photos (21)Site Photos (10)Search GoogleMineral Report for Region

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


Mineral List:
  		•  Actinolite
    ☐Ca
     
    2
    		(Mg,Fe
    2+
     
    		)
     
    5
    		(Si
     
    8
    		O
     
    22
    		)(OH)
     
    2
    Habit: bladed crystals
    Colour: green
    Reference: [Minerals of Washington, B. Cannon, 1975]
  		•  Actinolite
    var: Nephrite
    Reference: [Rocks & Min.: 14:112-113.]
  		•  'Albite-Anorthite Series'
    Reference: []
  		•  'Amphibole Group'
    Reference: [Cannon, B. (1975): Minerals of Washington, p.72]
  		•  Anglesite
    PbSO
     
    4
    Reference: [Cannon, B. (1975): Minerals of Washington, p.44,54,68]
  		•  Ankerite
    Ca(Fe
    2+
     
    		 ,Mg,Mn
    2+
     
    		)(CO
     
    3
    		)
     
    2
    Reference: [Cannon, B. (1975): Minerals of Washington, p.45]
  		•  Ankerite
    var: Nickeliferous Ankerite
    Reference: [Metal Mines of Washington-Preliminary Report; Derkey, Joseph, Lasmanis]
  		•  Anthophyllite
    ☐[Mg
     
    2
    		][Mg
     
    5
    		][(OH)
     
    2
    		|Si
     
    8
    		O
     
    22
    		]
    Habit: dense lapidary grade
    Colour: dark green
    Reference: [Cannon, B. (1975): Minerals of Washington, p.47]
  		•  Antigorite
    (Mg,Fe
    2+
     
    		)
     
    3
    		[(OH)
     
    4
    		|Si
     
    2
    		O
     
    5
    		]
    Reference: [Cannon, B. (1975): Minerals of Washington, p.63,83]
  		•  'Apophyllite'
    Description: constitutes up to 10% of the groundmass of the islands dunites
    Reference: [Cannon, B. (1975): Minerals of Washington, p.49]
  		•  Arsenopyrite
    FeAsS - (Fe
     
    0.90
    		Co
     
    0.10
    		)AsS
    Reference: [Inventory of Washington Minerals, Part II, Metalic Minerals, Vol. 1; M. Huntting, 1956 ]
  		•  'Axinite'
    Description: in altered pillow basalts
    Reference: [Cannon, B. (1975): Minerals of Washington, p.54]
  		•  Azurite
    Cu
     
    3
    		[OH|CO
     
    3
    		]
     
    2
    Reference: [Cannon, B. (1975): Minerals of Washington, p.44,54,68]
  		•  Bementite
    Mn
     
    5
    		Si
     
    4
    		O
     
    10
    		(OH)
     
    6
    Reference: [Cannon, B. (1975): Minerals of Washington, p.56]
  		•  Biotite
    Reference: [Inventory of Washington Minerals, Part I, Nonmetallic Minerals, Vol. 1; M. Huntting, 1956]
  		•  Bornite
    Cu
     
    5
    		FeS
     
    4
    Reference: [Inventory of Washington Minerals, Part II, Metalic Minerals, Vol. 1; M. Huntting, 1956 ]
  		•  Bravoite
    (Fe,Ni)S
     
    2
    Habit: microscopic impurities
    Description: in pyrite and marcasite
    Reference: [Cannon, B. (1975): Minerals of Washington, p.62]
  		•  Brucite
    Mg(OH)
     
    2
    Reference: [Cannon, B. (1975): Minerals of Washington, p.63]
  		•  Calcite
    CaCO
     
    3
    Habit: steep rhombohedral crystals, unusual aggregates of steep rhombohedral crystals, massive--filling voids, jackstraw clusters, and dendritic shapes
    Colour: white, colorless, pale yellow
    Reference: [George E. Mustoe, Dan G. Vandenburg, and LaVaonda M. Vandenburg, "The Minerals of Walker Valley, Skagit County, Washington," Washington Geology, vol. 24, no. 1, March 1996, pp 22-29]
    Site Photo
    Walker Valley, Mount Vernon, Skagit Co., Washington, USA
    © Karl Volkman 12/05
  		•  Celestine
    SrSO
     
    4
    Habit: massive viens; bladed crystaline aggregates
    Colour: white to light blue
    Description: Occurs in veins in a fault zone in dunite.
    Reference: [Cannon, B. (1975): Minerals of Washington, p.67]
  		•  Cerussite
    PbCO
     
    3
    Reference: [Cannon, B. (1975): Minerals of Washington, p.44,68]
  		•  'Chalcedony'
    Habit: cryptocrystalline
    Colour: white, gray, blue
    Description: "seam agate"
    Reference: [Mustoe, G. E., D. G. Vandenburg, & L. M. Vandenburg (1996a). The minerals of Walker Valley, Skagit County, Washington. Washington Geology v. 24, n. 1 (March 1996), pp 22-29.]
  		•  'Chalcedony
    var: Agate'
    SiO
     
    2
    Reference: []
  		•  Chalcopyrite
    CuFeS
     
    2
    Reference: [Cannon, B. (1975): Minerals of Washington, p.56]
  		•  'Chlorite Group'
    Reference: [Minerals of Washington, B. Cannon, 1975]
  		•  Chloritoid
    (Fe
    2+
     
    		,Mg,Mn
    2+
     
    		)Al
     
    2
    		[O|(OH)
     
    2
    		|SiO
     
    4
    		]
    Habit: grains
    Description: in amphibole gneiss
    Reference: [Cannon, B. (1975): Minerals of Washington, p.72]
  		•  Chromite
    FeCr
     
    2
    		O
     
    4
    Reference: []
  		•  'Chrysolite'
    Reference: [Cannon, B. (1975): Minerals of Washington, p.74]
  		•  Clinochlore
    var: Chromian Clinochlore
    Mg
     
    5
    		(Al,Cr)
     
    2
    		Si
     
    3
    		O
     
    10
    		(OH)
     
    8
    Reference: [Huntting, M. (1956): Inventory of Washington Minerals, Part II, Metallic Minerals, Vol. 1; Cannon, B. (1975): Minerals of Washington, p.73; Lasmanis, R. Et Al (1990): Metal Mines of Washington-Preliminary Report]
  		•  Copper
    Cu
    Reference: [Cannon, B. (1975): Minerals of Washington, p.56]
  		•  Cristobalite
    SiO
     
    2
    Reference: [George E. Mustoe, Dan G. Vandenburg, and LaVaonda M. Vandenburg, "The Minerals of Walker Valley, Skagit County, Washington," Washington Geology, vol. 24, no. 1, March 1996, pp 22-29]
  		•  Diopside
    CaMg[Si
     
    2
    		O
     
    6
    		]
    Reference: [Cannon, B. (1975): Minerals of Washington, p.83]
  		•  Dolomite
    CaMg(CO
     
    3
    		)
     
    2
    Reference: []
  		•  Galena
    PbS
    Reference: [Metal Mines of Washington-Preliminary Report; Derkey, Joseph, Lasmanis]
  		•  'Garnet Group'
    X
     
    3
    		Z
     
    2
    		(TO
     
    4
    		)
     
    3
    		 (X = Ca, Fe, etc·, Z = Al, Cr, etc·, T = Si, As, V)
    Reference: [Metal Mines of Washington-Preliminary Report; Derkey, Joseph, Lasmanis]
  		•  'Garnierite'
    Reference: [Minerals of Washington, Bart Cannon, 1975]
  		•  Glaucophane
    [ ][Na
     
    2
    		][Mg
     
    3
    		Al
     
    2
    		][(OH)
     
    2
    		|Si
     
    8
    		O
     
    22
    		]
    Reference: [Minerals of Washington, Bart Cannon, 1975]
  		•  Goethite
    α-Fe
    3+
     
    		O(OH)
    Habit: radiating divergent sprays
    Colour: golden brown
    Description: Micro-sized, but can form in exquisite, attractive sprays. A common associate of Quartz at Walker Valley
    Reference: [George E. Mustoe, Dan G. Vandenburg, and LaVaonda M. Vandenburg, "The Minerals of Walker Valley, Skagit County, Washington," Washington Geology, vol. 24, no. 1, March 1996, pp 22-29]
    Site Photo
    Walker Valley, Mount Vernon, Skagit Co., Washington, USA
    © 2002 Meyer
  		•  Gold
    Au
    Reference: [ Minerals of Washington, Bart Cannon 1975]
  		•  Graphite
    C
    Reference: [Inventory of Washington Minerals, Part I, Nonmetalic Minerals, Vol. 1; Marshall T. Huntting, 1956]
  		•  Grossular
    Ca
     
    3
    		Al
     
    2
    		[SiO
     
    4
    		]
     
    3
    Reference: [Minerals of Washington, B. Cannon, 1975]
  		•  Hematite
    Fe
     
    2
    		O
     
    3
    Habit: hexagonal plates
    Colour: black
    Description: tiny
    Reference: [George E. Mustoe, Dan G. Vandenburg, and LaVaonda M. Vandenburg, "The Minerals of Walker Valley, Skagit County, Washington," Washington Geology, vol. 24, no. 1, March 1996, pp 22-29]
  		•  Hisingerite
    Fe
    3+
    2
    		Si
     
    2
    		O
     
    5
    		(OH)
     
    4
    		·2H
     
    2
    		O
    Habit: amorphous
    Colour: black, green, brown
    Description: A common mineral at Walker Valley, found as linings and masses directly adjacent to the andesite. Often develops shrinkage cracks due to dehydration. Can also change color over time. Analysis methods included atomic absorbtion spectrophotometry.
    Reference: [Mustoe, G. E. (1996b). Hisingerite—a rare iron mineral from Walker Valley, Skagit County, Washington. Washington Geology v. 24, n. 4 (December, 1996) pp 14-19.]
  		•  'Hornblende'
    Description: Chromium Bearing
    Reference: [```Inventory of Washington Minerals, Part II, Metalic Minerals, Vol. 1; M. Huntting, 1956; Metal Mines of Washington-Preliminary Report; R. Derkey, N. Joseph, R. Lasmanis, 1990]
  		•  Hörnesite
    Mg
     
    3
    		(AsO
     
    4
    		)
     
    2
    		·8H
     
    2
    		O
    Reference: [www.cannonmicroprobe.com/Mineral_Specimens.htm ]
  		•  Jadeite
    Na(Al,Fe
    3+
     
    		)[Si
     
    2
    		O
     
    6
    		]
    Reference: [Rocks & Min.: 14:112-113.]
  		•  Kyanite
    Al
     
    2
    		[O|SiO
     
    4
    		]
    Reference: [Minerals of Washington, Bart Cannon, 1975]
  		•  Limonite
    var: Chromiferous Limonite
    Reference: [```Inventory of Washington Minerals, Part II, Metalic Minerals, Vol. 1; M. Huntting, 1956; Metal Mines of Washington-Preliminary Report; R. Derkey, N. Joseph, R. Lasmanis, 1990]
  		•  Magnesite
    MgCO
     
    3
    Reference: []
  		•  Magnetite
    Fe
    2+
     
    		Fe
    3+
    2
    		O
     
    4
    Reference: [Metal Mines of Washington-Preliminary Report; Derkey, Joseph, Lasmanis]
  		•  Malachite
    Cu
     
    2
    		[(OH)
     
    2
    		|CO
     
    3
    		]
    Reference: [Cannon, B. (1975): Minerals of Washington, p.44,54,68]
  		•  Marcasite
    FeS
     
    2
    Reference: [Cannon, B. (1975): Minerals of Washington, p.62]
  		•  Mimetite
    Pb
     
    5
    		[Cl|(AsO
     
    4
    		)
     
    3
    		]
    Reference: [Cannon, B. (1975): Minerals of Washington, p.44,54,68]
  		•  'Olivine'
    (Mg,Fe
    2+
     
    		)
     
    2
    		[SiO
     
    4
    		]
    Reference: [Cannon, B. (1975): Minerals of Washington, p.73]
  		•  Opal
    SiO
     
    2
    		·nH
     
    2
    		O
    Reference: []
  		•  Pectolite
    NaCa
     
    2
    		[HSi
     
    3
    		O
     
    9
    		]
    Reference: [Cannon, B. (1975): Minerals of Washington, p.74]
  		•  Platinum ?
    Pt
    Reference: [Inventory of Washington Minerals, Part II, Metalic Minerals, Vol. 1; M. Huntting, 1956 ]
  		•  Prehnite
    Ca
     
    2
    		Al
     
    2
    		Si
     
    3
    		O
     
    12
    		(OH)
    Reference: [Cannon, B. (1975): Minerals of Washington, p.74]
  		•  Pyrite
    FeS
     
    2
    Habit: cubes, pyritohedrons
    Colour: brassy metallic yellow
    Description: micro crystals are uncommon. In 1992, three crystals that were approximately 1 cm in size were found in a geode
    Reference: [George E. Mustoe, Dan G. Vandenburg, and LaVaonda M. Vandenburg, "The Minerals of Walker Valley, Skagit County, Washington," Washington Geology, vol. 24, no. 1, March 1996, pp 22-29]
  		•  Pyrope
    Mg
     
    3
    		Al
     
    2
    		[SiO
     
    4
    		]
     
    3
    Reference: [Inventory of Washington Minerals, Part I, Nonmetalic Minerals, Vol. 1; Marshall T. Huntting, 1956]
  		•  Quartz
    SiO
     
    2
    Habit: druzy, mostly showing terminal faces, some sceptered, cryptocrystalline
    Colour: colorless, light to medium purple. Chalcedony can be white, gray, and blue.
    Description: Lining geodes and in stalactitic forms. As Chalcedony.
    Reference: [George E. Mustoe, Dan G. Vandenburg, and LaVaonda M. Vandenburg, "The Minerals of Walker Valley, Skagit County, Washington," Washington Geology, vol. 24, no. 1, March 1996, pp 22-29]
    Site Photo
    Walker Valley, Mount Vernon, Skagit Co., Washington, USA
    © 2007 ROM
  		•  Quartz
    var: Amethyst
    SiO
     
    2
    Habit: druzy, mostly showing terminal faces
    Colour: pale to medium purple
    Description: pale to medium amethyst lining geodes
    Reference: [Cannon, B. (1975). Minerals of Washington. Mercer Island: Cordilleran.]
    Site Photo
    Walker Valley, Mount Vernon, Skagit Co., Washington, USA
    © Alan Goldstein
  		•  Quartz
    var: Chert
    Reference: []
  		•  Quartz
    var: Sceptre Quartz
    Reference: [Minerals of Washington, Bart Cannon, 1975]
  		•  Quartz
    var: Smoky Quartz
    SiO
     
    2
    Reference: [www.stonetrails.com]
  		•  Realgar
    As
     
    4
    		S
     
    4
    Reference: [Minerals of Washington, Bart Cannon, 1975]
  		•  Rutile
    TiO
     
    2
    Reference: [various added photos]
  		•  Sepiolite
    Mg
     
    4
    		Si
     
    6
    		O
     
    15
    		(OH)
     
    2
    		·6H
     
    2
    		O
    Reference: [Rocks & Min.: 14:112-113.]
  		•  'Serpentine Group'
    D
     
    2
    		[Si
     
    2
    		O
     
    5
    		](OH)4 + or - nH
     
    2
    		O
    Reference: [www.cannonmicroprobe.com/Mineral_Specimens.htm ]
  		•  Siderite
    FeCO
     
    3
    Habit: Spherical groups (spherosiderite), columnar masses of stacked plates, radiating rods, or jackstraw arrangements
    Colour: brown to amber
    Description: Usually occupying the central portions of geodes. At times enclosed in quartz forming "sagenite."
    Reference: [George E. Mustoe, Dan G. Vandenburg, and LaVaonda M. Vandenburg, "The Minerals of Walker Valley, Skagit County, Washington," Washington Geology, vol. 24, no. 1, March 1996, pp 22-29]
  		•  Sphalerite
    (Zn,Fe
    2+
     
    		)S
    Reference: [Metal Mines of Washington-Preliminary Report; Derkey, Joseph, Lasmanis]
  		•  Staurolite
    (Fe
    2+
     
    		,Mg,Zn)
     
    1.5-2
    		Al
     
    9
    		[O
     
    6
    		|(OH,O)
     
    2
    		|(SiO
     
    4
    		)
     
    4
    		]
    Reference: [Minerals of Washington, Bart Cannon, 1975]
  		•  Stilpnomelane
    (K,Ca,Na)(Fe
    2+
     
    		,Mg,Al,Fe
    3+
     
    		)
     
    8
    		(Si,Al)
     
    12
    		(O,OH)
     
    36
    		 · nH
     
    2
    		O
    Reference: [Micro Probe Volume VII Number 3 Spring 1996]
    Site Photo
    Blanchard Hill (Blanchard Mountain), Bellingham, Skagit Co., Washington, USA
    © J.A.CENDON
  		•  Strontianite
    SrCO
     
    3
    Reference: [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: 199.]
    Site Photo
    Alverson Mine, La Conner, Skagit Co., Washington, USA
    © Steve Satra
  		•  Talc
    Mg
     
    3
    		Si
     
    4
    		O
     
    10
    		(OH)
     
    2
    Reference: [Huntting, M. (1956): Inventory of Washington Minerals, Part I, Nonmetallic Minerals, Vol. 1; Cannon, B. (1975): Minerals of Washington, p.45]
  		•  Tetrahedrite
    (Cu,Fe,Ag,Zn)
     
    12
    		Sb
     
    4
    		S
     
    13
    Reference: [Inventory of Washington Minerals, Part II, Metalic Minerals, Vol. 1; M. Huntting, 1956 ]
  		•  Vermiculite
    (Mg,Fe,Al)
     
    3
    		(Al,Si)
     
    4
    		O
     
    10
    		(OH)
     
    2
    		·4H
     
    2
    		O
    Reference: [Huntting, M. (1956): Inventory of Washington Minerals, Part I, Nonmetallic Minerals, Vol. 1; Cannon, B. (1975): Minerals of Washington, p.45]
  		•  Xonotlite
    Ca
     
    6
    		Si
     
    6
    		O
     
    17
    		(OH)
     
    2
    Reference: [Cannon, B. (1975): Minerals of Washington, p.74]


    78 entries listed. 55 valid minerals.

    Localities in this Region:
    USA
     
    • Washington
      • Skagit Co.
          • Cranberry Lake
        • Bald Mountain
        • Bellingham
        • Boston Basin
        • Burlington
        • Cascade River
        • Clear Lake
          • Cypress Lake
          • hill 1262
          • Mexican Bay
          • Triangulation Point
        • Dispassi Creek
        • Forbidden Peak
          • Cascade Pass Road
        • Mount Higgins
        • Rockport
        • Soldier Boy Creek
        • Thurnwood

    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 Washington, 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: 28th Nov 2009 15:40:55