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Derbyshire, England, UK

Production of fluorspar (250,000 tonnes), barite, lead and zinc with ~2000 named veins.



References:
Braithwaite, R. S.W. (1983): Minerals of the Derbyshire Orefield. Mineralogical Record 14 (1), 15-24.

Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.




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
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Albite
    Na[AlSi
     
    3
    O
     
    8
    ]
    Reference: [BMS Database; Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Albite
    var: Oligoclase
    (Na,Ca)[Al(Si,Al)Si
     
    2
    O
     
    8
    ]
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Allophane
    (Al
     
    2
    O
     
    3
    )(SiO
     
    2
    )
     
    1.3-2
    ·2.5-3H
     
    2
    O
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Alstonite
    BaCa(CO
     
    3
    )
     
    2
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Alum-(K)
    KAl[SO
     
    4
    ]
     
    2
    · 12H
     
    2
    O
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Analcime
    Na
     
    2
    [Al
     
    2
    Si
     
    4
    O
     
    12
    ] · 2H
     
    2
    O
    Reference: [J. Russell Soc. 2001-89]; Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Anglesite
    PbSO
     
    4
    Reference: [Rocks & Min.: 17:125.]
    Site Photo
    Milldam Mine, Great Hucklow, Derbyshire, England, UK
    © P N Min.
  • Anhydrite
    CaSO
     
    4
    Reference: [F. Rutley: "Elements of Mineralogy", 12th Ed. (1900)]
  • Anorthite
    var: Labradorite
    (Ca,Na)[Al(Al,Si)Si
     
    2
    O
     
    8
    ]
    Reference: [BMS Database]
  • 'Apatite'
    Reference: [BMS Database]
  • 'Apatite
    var: Collophane'
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Aragonite
    CaCO
     
    3
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Arsenopyrite
    FeAsS - (Fe
     
    0.90
    Co
     
    0.10
    )AsS
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Ashoverite (TL)
    Zn(OH)
     
    2
    Type Locality: Milltown Quarry, Milltown, Ashover, Derbyshire, England, UK
    Habit: Tetragonal thin tabular-platy
    Colour: Colourless to white, creamy
    Description: Thin platy Square-like crystals to 1mm, associated with all other zinc hydroxides
    Reference: [Min.Mag.(1988) 52, 699-702; UKJMM No10; Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
    Site Photo
    Milltown Quarry, Milltown, Ashover, Derbyshire, England, UK
    © Steve Rust
  • Augite
    (Ca,Na)(Mg,Fe
    2+
     
    ,Al,Fe
    3+
     
    ,Ti)[(Si,Al)
     
    2
    O
     
    6
    ]
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Aurichalcite
    (Zn,Cu)
     
    5
    [(OH)
     
    3
    |CO
     
    3
    ]
     
    2
    Reference: [Mineralogical Magazine 1963 33 : 441-449; Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
    Site Photo
    Golconda mine, Brassington, Derbyshire, England, UK
    © 2006 Thames Valley Minerals
  • Azurite
    Cu
     
    3
    [OH|CO
     
    3
    ]
     
    2
    Reference: [BMS Database]
    Site Photo
    Isolation Mine (Snelston Mine), Snelston, Derbyshire, England, UK
    © Steve Rust
  • Baryte
    BaSO
     
    4
    Habit: Platy to thin bladed, cockscombe
    Colour: Creamy
    Description: Platy divergent crystal groups to 4mm, and as thin bladed elongated crystals. Rarely tinted yellow by greenockite
    Reference: [Rust, S. Seltene Mineralien aus dem Steinbruch Milltown bei Ashover LAPIS Mineralienmagazin 1994, 12, p.13-17, 58]
    Site Photo
    Derbyshire, England, UK
    © Dan Weinrich
  • Baryte
    var: Oakstone
    Reference: [UK Journal of Mines and Minerals, No. 12 p10-14]
    Site Photo
    Middleton Common, Middleton, Youlgrave, Derbyshire, England, UK
    © 2002 John H. Betts
  • 'Baryto-Fluate of Lime'
    Reference: [No reference listed]
  • Beidellite
    (Na,Ca
     
    0.5
    )
     
    0.3
    Al
     
    2
    (Si,Al)
     
    4
    O
     
    10
    (OH)
     
    2
    ·nH
     
    2
    O
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Biotite
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • 'Bitumen
    var: Elaterite'
    Reference: [D Mycroft collection]
  • Bornite
    Cu
     
    5
    FeS
     
    4
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Brochantite
    Cu
     
    4
    [(OH)
     
    6
    |SO
     
    4
    ]
    Reference: [MinRec 14:23; Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Calcite
    CaCO
     
    3
    Reference: [UKJMM Vol.15 p.28-29]
    Site Photo
    Dirtlow Rake, Castleton, Derbyshire, England, UK
    © Steve Rust
  • Calcite
    var: Ferroan Calcite
    (Ca,Fe)CO
     
    3
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Calcite
    var: Iceland Spar
    Reference: [Rocks & Min.: 22: 1123.]
  • Caledonite
    Cu
     
    2
    Pb
     
    5
    [(OH)
     
    6
    |CO
     
    3
    |(SO
     
    4
    )
     
    3
    ]
    Description: Xls to 0.5mm
    Reference: [No reference listed]
  • Celadonite
    K(Mg,Fe
    2+
     
    )(Fe
    3+
     
    ,Al)[(OH)
     
    2
    |Si
     
    4
    O
     
    10
    ]
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Celestine
    SrSO
     
    4
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Cerussite
    PbCO
     
    3
    Habit: Various
    Colour: Colourless, grey, creamy
    Fluorescence: pale yellow
    Description: Crystals to 4mm
    Reference: [Rust, S. Seltene Mineralien aus dem Steinbruch Milltown bei Ashover LAPIS Mineralienmagazin 1994, 12, p.13-17, 58]; Min.Mag.(1984) 48, 267-269; Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
    Site Photo
    Milltown Quarry, Milltown, Ashover, Derbyshire, England, UK
    © Steve Rust
  • Chalcanthite
    CuSO
     
    4
    ·5H
     
    2
    O
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • 'Chalcedony'
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • 'Chalcedony
    var: Agate'
    SiO
     
    2
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • 'Chalcedony
    var: Beekite'
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Chalcocite
    Cu
     
    2
    S
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Chalcopyrite
    CuFeS
     
    2
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Chamosite
    (Fe
    2+
     
    ,Mg)
     
    5
    Al[(OH)
     
    8
    |AlSi
     
    3
    O
     
    10
    ]
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • 'Chlorite Group'
    Reference: [J. Russell Soc. 2001-89]; Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Chrysocolla
    (Cu,Al)
     
    2
    H
     
    2
    Si
     
    2
    O
     
    5
    (OH)
     
    4
    ·nH
     
    2
    O
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Chrysotile
    Mg
     
    3
    Si
     
    2
    O
     
    5
    (OH)
     
    4
    Reference: [BMS Database; Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Cinnabar
    HgS
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Clinochlore
    var: Corundophilite
    (Mg,Fe,Al)
     
    6
    (Si,Al)
     
    4
    O
     
    10
    (OH)
     
    8
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Clinochlore
    var: Delessite
    (Mg,Fe,Fe,Al)(Si,Al)
     
    4
    O
     
    10
    (O,OH)
     
    8
    Reference: [Specimen in the Natural History Museum, London]
  • Clinochlore
    var: Diabantite
    (Mg,Fe,Al)
     
    6
    (Si,Al)
     
    4
    O
     
    10
    (OH)
     
    8
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Clinochlore
    var: Pennine
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Copper
    Cu
    Reference: [BMS Database]
  • Covellite
    CuS
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Cuprite
    Cu
     
    2
    O
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Descloizite
    Pb(Zn,Cu)[OH|VO
     
    4
    ]
    Reference: [vanadinite and descloizite, probably the best yet to be found in England and the secondary lead mineral suite including leadhillite, lanarkite, cerussite, anglesite, pyromorphite, scotlandite, mattheddleite and possibly susannite. Other minerals found were barite, calcite, hemimorphite, and sphalerite.]
  • Digenite
    Cu
     
    9
    S
     
    5
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Dolomite
    CaMg(CO
     
    3
    )
     
    2
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Dundasite
    PbAl
     
    2
    [(OH)
     
    2
    |CO
     
    3
    ]
     
    2
    · H
     
    2
    O
    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: 280; Specimen in the Natural History Museum, London.; Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Enargite
    Cu
     
    3
    AsS
     
    4
    Reference: [UKJMM Vol.15 p.28-29]
  • Enstatite
    Mg
     
    2
    [SiO
     
    3
    ]
     
    2
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Ettringite
    Ca
     
    6
    Al
     
    2
    [(OH)
     
    4
    |SO
     
    4
    ]
     
    3
    · 26H
     
    2
    O
    Habit: Radial hexagonal,acicular.
    Colour: Colourless to white, and creamy
    Description: Very rare as groups of hemispherical and prismatic crystals to 2mm. On fluorite, associated with weddellite. Rarely found on corroded cerussite, with litarge.
    Reference: [Rust, S. Seltene Mineralien aus dem Steinbruch Milltown bei Ashover LAPIS Mineralienmagazin 1994, 12, p.13-17, 58; Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
    Site Photo
    Milltown Quarry, Milltown, Ashover, Derbyshire, England, UK
    © Steve Rust
  • Fluorite
    CaF
     
    2
    Reference: [Fluorite: The Collector's Choice. Extra Lapis English No. 9; UKJMM Vol.15 p.28-29; Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
    Site Photo
    Derbyshire, England, UK
    © Van Heghe Photo
  • Fluorite
    var: Blue John
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
    Site Photo
    Old Tor Mine, Castleton, Derbyshire, England, UK
    © Jorge M. Alves
  • Galena
    PbS
    Reference: [UKJMM Vol.15 p.28-29; Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
    Site Photo
    Derbyshire, England, UK
    © Rob Lavinsky
  • 'Garnet Group'
    X
     
    3
    Z
     
    2
    (TO
     
    4
    )
     
    3
    (X = Ca, Fe, etc·, Z = Al, Cr, etc·, T = Si, As, V)
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Gibbsite
    Al(OH)
     
    3
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Glauconite
    K
     
    0.08
    R
    1
    1.33
    R
    2
    0.67
    [][Al
     
    0.13
    Si
     
    3.87
    O
     
    10
    ](OH)
     
    2
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Goethite
    α-Fe
    3+
     
    O(OH)
    Reference: [No reference listed]
    Site Photo
    Calton Hill Quarry, Buxton, Derbyshire, England, UK
    © Bill Gordon
  • Gold
    Au
    Reference: [BMS Database]
  • Graphite
    C
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Greenockite
    CdS
    Habit: Very thin crusts
    Colour: Yellow
    Description: Thin smears and powders on or near partly corroded sphalerite
    Reference: [S Rust collection]
  • Gypsum
    Ca[SO
     
    4
    ] · 2H
     
    2
    O
    Habit: Fibrous-acicular
    Colour: White
    Description: Forms a fibrous white filling to small cavitys. and as fibrous pseudomorphs after rhombic calcite crystals. Associated with hydrocerussite, and rarely weddellite.
    Reference: [Rust, S. Seltene Mineralien aus dem Steinbruch Milltown bei Ashover LAPIS Mineralienmagazin 1994, 12, p.13-17, 58]
  • Gypsum
    var: Alabaster
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55; http://34.1911encyclopedia.org/A/AL/ALABASTER.htm.]
  • Gypsum
    var: Selenite
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Halloysite
    Al
     
    2
    Si
     
    2
    O
     
    5
    (OH)
     
    4
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Hawleyite
    CdS
    Reference: [BMS Database; Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Hematite
    Fe
     
    2
    O
     
    3
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Hemimorphite
    Zn
     
    4
    [(OH)
     
    2
    |Si
     
    2
    O
     
    7
    ] · H
     
    2
    O
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
    Site Photo
    Slayley Quarry (Bonsall Moor Quarry; Moor Farm Quarry), Bonsall Moor, Winster, Derbyshire, England, UK
    © Steve Rust
  • Hercynite
    var: Picotite
    (Fe,Mg)(Al,Cr)
     
    2
    O
     
    4
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Hydrocerussite
    Pb
     
    3
    (CO
     
    3
    )
     
    2
    (OH)
     
    2
    Habit: Hexagonal micro crystals, and flacky masses.
    Colour: Colouless to tinted brown, and creamy to reddish.
    Description: Forms in two habits. The first as minute platy hexagonal crystals. The second as unusual masses to 1.5cms of cellular flacky masses associated with litharge.
    Reference: [S. Rust collection; Min.Mag.(1984) 48, 267-269; Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
    Site Photo
    Milltown Quarry, Milltown, Ashover, Derbyshire, England, UK
    © Steve Rust
  • Hydrozincite
    Zn
     
    5
    [(OH)
     
    3
    |CO
     
    3
    ]
     
    2
    Habit: Micro-radial acicular crystals
    Colour: White, creamy
    Reference: [Rust, S. Seltene Mineralien aus dem Steinbruch Milltown bei Ashover LAPIS Mineralienmagazin 1994, 12, p.13-17, 58; Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
    Site Photo
    Milltown Quarry, Milltown, Ashover, Derbyshire, England, UK
    © Steve Rust
  • Illite
    K
     
    0.65
    A
     
    2.0
    [][Al
     
    0.65
    Si,
     
    3.35
    O
     
    10
    ](OH)
     
    2
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Jarosite
    KFe
    3+
     
     
    3
    [(OH)
     
    3
    |SO
     
    4
    ]
     
    2
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Kaolinite
    Al
     
    2
    Si
     
    2
    O
     
    5
    (OH)
     
    4
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Lanarkite
    Pb
     
    2
    [O|SO
     
    4
    ]
    Reference: [vanadinite and descloizite, probably the best yet to be found in England and the secondary lead mineral suite including leadhillite, lanarkite, cerussite, anglesite, pyromorphite, scotlandite, mattheddleite and possibly susannite. Other minerals found were barite, calcite, hemimorphite, and sphalerite.]
  • Langite
    Cu
     
    4
    [(OH)
     
    6
    |SO
     
    4
    ] · 2H
     
    2
    O
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Leadhillite
    Pb
     
    4
    SO
     
    4
    (CO
     
    3
    )
     
    2
    (OH)
     
    2
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Lepidocrocite
    γ-Fe
    3+
     
    O(OH)
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Limonite
    FeO(OH)·nH
     
    2
    O
    Reference: [BMS Database]
  • Linarite
    PbCu[(OH)
     
    2
    |SO
     
    4
    ]
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Litharge
    PbO
    Habit: Tetragonal pseudomorphs possibly after the Unnamed (Tetragonal Pb Oxide Hydrate)
    Colour: Shades of red
    Description: Forms tetragonal pseudomorphs to 2mm after the unnamed (tetragonal Pb oxide hydrate). Grown on corroded cerussite with supergene calcite
    Reference: [Rust, S. Seltene Mineralien aus dem Steinbruch Milltown bei Ashover LAPIS Mineralienmagazin 1994, 12, p.13-17, 58]; Min.Mag.(1984) 48, 267-269; Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
    Site Photo
    Milltown Quarry, Milltown, Ashover, Derbyshire, England, UK
    © Steve Rust
  • Maghemite
    Fe
     
    2
    O
     
    3
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Magnetite
    Fe
    2+
     
    Fe
    3+
    2
    O
     
    4
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Magnetite
    var: Titaniferous Magnetite
    Fe
    2+
     
    (Fe
    3+
     
    ,Ti)
     
    2
    O
     
    4
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Malachite
    Cu
     
    2
    [(OH)
     
    2
    |CO
     
    3
    ]
    Reference: [BMS Database]
    Site Photo
    Isolation Mine (Snelston Mine), Snelston, Derbyshire, England, UK
    © Steve Rust
  • Marcasite
    FeS
     
    2
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Massicot
    PbO
    Habit: Tetragonal pseudomorphs
    Colour: Yellow-creamy
    Reference: [Rust, S. Seltene Mineralien aus dem Steinbruch Milltown bei Ashover LAPIS Mineralienmagazin 1994, 12, p.13-17, 58]
  • Matlockite (TL)
    PbFCl
    Type Locality: Cromford, Matlock, Derbyshire, England, UK
    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: 60.]
    Site Photo
    Cromford, Matlock, Derbyshire, England, UK
    © Van King
  • Mattheddleite
    Pb
     
    5
    (Si
     
    1.5
    S
     
    1.5
    )O
     
    12
    (Cl,OH)
    Reference: [vanadinite and descloizite, probably the best yet to be found in England and the secondary lead mineral suite including leadhillite, lanarkite, cerussite, anglesite, pyromorphite, scotlandite, mattheddleite and possibly susannite. Other minerals found were barite, calcite, hemimorphite, and sphalerite.]
  • Melanterite
    FeSO
     
    4
    ·7H
     
    2
    O
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Microcline
    K[AlSi
     
    3
    O
     
    8
    ]
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Millerite
    NiS
    Reference: [BMS Database; Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
    Site Photo
    Fall Hill Quarry, Ashover, Derbyshire, England, UK
    © Arliguie M
  • Mimetite
    Pb
     
    5
    [Cl|(AsO
     
    4
    )
     
    3
    ]
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Minium ?
    Pb
     
    3
    O
     
    4
    Reference: [BMS Database; Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Mogánite
    SiO
     
    2
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Montmorillonite
    (Na,Ca)
     
    0.33
    (Al,Mg)
     
    2
    Si
     
    4
    O
     
    10
    (OH)
     
    2
    ·nH
     
    2
    O
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Morenosite
    NiSO
     
    4
    ·7H
     
    2
    O
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Muscovite
    KAl
     
    2
    [(OH)
     
    2
    |AlSi
     
    3
    O
     
    10
    ]
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Natrolite
    Na
     
    2
    [Al
     
    2
    Si
     
    3
    O
     
    10
    ] · 2H
     
    2
    O
    Reference: [J. Russell Soc. 2001-89]
  • 'Ochre'
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • 'Olivine'
    (Mg,Fe
    2+
     
    )
     
    2
    [SiO
     
    4
    ]
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Opal ?
    SiO
     
    2
    ·nH
     
    2
    O
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Orthoclase
    K[AlSi
     
    3
    O
     
    8
    ]
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Palygorskite
    (Mg,Al)
     
    5
    (Si,Al)
     
    8
    O
     
    20
    (OH)
     
    2
    ·8H
     
    2
    O
    Habit: Botryoidal
    Colour: Creamy
    Reference: [Rust, S. Seltene Mineralien aus dem Steinbruch Milltown bei Ashover LAPIS Mineralienmagazin 1994, 12, p.13-17, 58]; Min.Mag.(1984) 48, 267-269; Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
    Site Photo
    Milltown Quarry, Milltown, Ashover, Derbyshire, England, UK
    © Steve Rust
  • Paragonite
    NaAl
     
    2
    [(OH)
     
    2
    |AlSi
     
    3
    O
     
    10
    ]
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Phosgenite
    Pb
     
    2
    [Cl
     
    2
    |CO
     
    3
    ]
    Reference: [MinRec 14:18-19, 4:79-80; Rocks & Min.: 16:131.; Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
    Site Photo
    Bage Mine, Bolehill, Derbyshire, England, UK
    © J.Ralph
  • Phosphohedyphane
    Pb
     
    3
    Ca
     
    2
    [Cl|(PO
     
    4
    )
     
    3
    ]
    Reference: [Peter Briscoe collection]
    Site Photo
    Whitwell quarry, Whitwell, Derbyshire, England, UK
    © steetleyminerals.co.uk
  • Pyrite
    FeS
     
    2
    Reference: [UKJMM Vol.15 p.28-29; Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
    Site Photo
    Crich Quarry, Crich, Derbyshire, England, UK
    © Paul Nicholson
  • Pyrite
    var: Bravoite
    (Fe,Ni)S
     
    2
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Pyrolusite
    MnO
     
    2
    Reference: [BMS Database]
  • Pyromorphite
    Pb
     
    5
    [Cl|(PO
     
    4
    )
     
    3
    ]
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
    Site Photo
    Derbyshire, England, UK
    © Rob Lavinsky
  • Pyrrhotite
    Fe
     
    7
    S
     
    8
    , (-4M), also given as Fe
     
    1-x
    S (x = 0 - 0.2)
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Quartz
    SiO
     
    2
    Reference: [No reference listed]
    Site Photo
    Derbyshire, England, UK
    © Rob Lavinsky
  • Quartz
    var: Amethyst
    SiO
     
    2
    Reference: [Pers Comm]
  • Quartz
    var: Chert
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Quartz
    var: Jasper
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Quartz
    var: Rose Quartz
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Quartz
    var: Smoky Quartz
    SiO
     
    2
    Reference: [Pers Comm]
  • Rhodochrosite
    MnCO
     
    3
    Reference: [Pers Comm]
  • Rosasite
    (Cu,Zn)
     
    2
    [(OH)
     
    2
    |CO
     
    3
    ]
    Reference: [Mineralogical Magazine 1963 33 : 441-449; Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Rutile
    TiO
     
    2
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Saponite
    Ca
     
    0.25
    (Mg,Fe)
     
    3
    (Si,Al)
     
    4
    O
     
    10
    (OH)
     
    2
    ·nH
     
    2
    O
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • 'Serpentine Group'
    D
     
    2
    [Si
     
    2
    O
     
    5
    ](OH)4 + or - nH
     
    2
    O
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Serpierite
    Ca(Cu,Zn)
     
    4
    (SO
     
    4
    )
     
    2
    (OH)
     
    6
    ·3H
     
    2
    O
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Siderite
    FeCO
     
    3
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
    Site Photo
    Derbyshire, England, UK
    © Rob Lavinsky
  • Silver
    Ag
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Smithsonite
    ZnCO
     
    3
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
    Site Photo
    Wapping Mine, Matlock Bath, Derbyshire, England, UK
     
  • Sphalerite
    (Zn,Fe
    2+
     
    )S
    Reference: [No reference listed]
    Site Photo
    Derbyshire, England, UK
    © Rob Lavinsky
  • Stibnite ?
    Sb
     
    2
    S
     
    3
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Strontianite ?
    SrCO
     
    3
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Sulphur
    S
     
    8
    Habit: Rounded crystals
    Colour: Pale yellow green
    Reference: [Rust, S. Seltene Mineralien aus dem Steinbruch Milltown bei Ashover LAPIS Mineralienmagazin 1994, 12, p.13-17, 58]; Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Susannite ?
    Pb
     
    4
    SO
     
    4
    (CO
     
    3
    )
     
    2
    (OH)
     
    2
    Reference: [vanadinite and descloizite, probably the best yet to be found in England and the secondary lead mineral suite including leadhillite, lanarkite, cerussite, anglesite, pyromorphite, scotlandite, mattheddleite and possibly susannite. Other minerals found were barite, calcite, hemimorphite, and sphalerite.]
  • Sweetite (TL)
    Zn(OH)
     
    2
    Type Locality: Milltown Quarry, Milltown, Ashover, Derbyshire, England, UK
    Habit: Tetragonal bipyramids
    Colour: Colourless-white, creamy
    Reference: [Min.Mag.(1984) 48, 267-269; Rust, S. Seltene Mineralien aus dem Steinbruch Milltown bei Ashover LAPIS Mineralienmagazin 1994, 12, p.13-17, 58]; Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
    Site Photo
    Milltown Quarry, Milltown, Ashover, Derbyshire, England, UK
    © Steve Rust
  • Talc
    var: Steatite ?
    Mg
     
    3
    Si
     
    4
    O
     
    10
    (OH)
     
    2
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Tenorite
    CuO
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Tetrahedrite
    (Cu,Fe,Ag,Zn)
     
    12
    Sb
     
    4
    S
     
    13
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Titanite
    CaTi[O|SiO
     
    4
    ]
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Torbernite
    Cu(UO
     
    2
    )
     
    2
    (PO
     
    4
    )
     
    2
    ·12H
     
    2
    O
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Tyrolite
    Ca
     
    2
    Cu
     
    9
    [(OH)
     
    4
    |(H
     
    2
    O)
     
    11
    |CO
     
    3
    |(AsO
     
    4
    )
     
    4
    ] · 0-1H
     
    2
    O
    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: 926.]
  • 'Unnamed (alpha-Zn(OH)2)'
    α-Zn(OH)
     
    2
    Habit: Radial lath-like
    Colour: White
    Description: Radial hemispherical masses to 1mm, associated with ashoverite, sweetite, and hemimorphite.
    Reference: [S Rust collection]
  • Unnamed (Ba-Al Trisulphide Hydroxide Hydrate)
    BaS
     
    3
    ·Ba(OH)
     
    2
    ·2Al(OH)
     
    3
    ·8H
     
    2
    O
    Reference: [Braithwaite, R.S.W., Kampf, A.R., Pritchard, R.G., Lamb, R.P.H. (1993): The occurrence of thiosulfates and other unstable sulfur species as natural weathering products of old smelting slags. Mineralogy and Petrology, 47, 255-261.]
  • Unnamed (Ba Thiosulphate Fluoride)
    Ba
     
    2
    F
     
    2
    (S
    6+
     
    O
     
    3
    S
    2-
     
    )
    Reference: [Braithwaite, R.S.W., Kampf, A.R., Pritchard, R.G., Lamb, R.P.H. (1993): The occurrence of thiosulfates and other unstable sulfur species as natural weathering products of old smelting slags. Mineralogy and Petrology, 47, 255-261.]
  • Unnamed (Ba Thiosulphate Monohydrate)
    Reference: [Braithwaite, R.S.W., Kampf, A.R., Pritchard, R.G., Lamb, R.P.H. (1993): The occurrence of thiosulfates and other unstable sulfur species as natural weathering products of old smelting slags. Mineralogy and Petrology, 47, 255-261.]
  • 'Unnamed (Tetragonal Pb Oxide Hydrate)'
    3PbO·H
     
    2
    O
    Habit: Tetragonal
    Colour: Grey white to creamy
    Fluorescence: non
    Description: 0.7mm tetragonal bipyramids
    Reference: [S Rust collection]
    Site Photo
    Milltown Quarry, Milltown, Ashover, Derbyshire, England, UK
    © Steve Rust
  • Uraninite
    UO
     
    2
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Vanadinite
    Pb
     
    5
    [Cl|(VO
     
    4
    )
     
    3
    ]
    Reference: [http://www.rock-site.co.uk/; vanadinite and descloizite, probably the best yet to be found in England and the secondary lead mineral suite including leadhillite, lanarkite, cerussite, anglesite, pyromorphite, scotlandite, mattheddleite and possibly susannite. Other minerals found were barite, calcite, hemimorphite, and sphalerite.]
  • Vivianite
    Fe
    2+
    3
    (PO
     
    4
    )
     
    2
    ·8H
     
    2
    O
    Reference: [F. Rutley: "Elements of Mineralogy", 12th Ed. (1900); Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • 'Wad'
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Weddellite
    Ca[C
     
    2
    O
     
    4
    ] · 2H
     
    2
    O
    Habit: Prismatic, bipyramiddle
    Colour: Colourless- pale broen
    Reference: [Rust, S. Seltene Mineralien aus dem Steinbruch Milltown bei Ashover LAPIS Mineralienmagazin 1994, 12, p.13-17, 58]; Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
    Site Photo
    Milltown Quarry, Milltown, Ashover, Derbyshire, England, UK
    © Steve Rust
  • Wulfenite
    Pb[MoO
     
    4
    ]
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
    Site Photo
    Isolation Mine (Snelston Mine), Snelston, Derbyshire, England, UK
    © Steve Rust
  • Wülfingite
    Zn(OH)
     
    2
    Habit: Bladed radial star-like
    Colour: Colourless
    Reference: [Rust, S. Seltene Mineralien aus dem Steinbruch Milltown bei Ashover LAPIS Mineralienmagazin 1994, 12, p.13-17, 58]; Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
    Site Photo
    Milltown Quarry, Milltown, Ashover, Derbyshire, England, UK
    © Steve Rust
  • Wurtzite
    (Zn,Fe)S
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.]
  • Zaratite
    Ni
     
    3
    (CO
     
    3
    )(OH)
     
    4
    ·4H
     
    2
    O
    Reference: [Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55]
  • Zircon
    Zr[SiO
     
    4
    ]
    Reference: [BMS Database]


    161 entries listed. 116 valid minerals. 3 type localities (valid minerals). 2 erroneous literature entries.

    Localities in this Region:
    UK
     
    • England
      • Derbyshire
        • Alport
        • Ashford-in-the-Water
        • Boulton
        • Cressbrook Dale
        • Derby
        • Earl Sterndale
        • Flagg
        • Great Longstone
        • Manifold Valley
        • Pike Hall
        • Ringinglow
        • Sheffield
        • Snitterton
        • Taddington
        • Via Gellia
        • Wardlow
        • Whitwell

    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. 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: 20th Nov 2009 09:17:41