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Fayalite

Big Photo

Coso Hot Springs deposit, Coso Hot Springs, Inyo Co., California, USA
© Saul Krotki 2002

Show Fayalite Photos (20)
Formula:
Fe
2+
2
[SiO
 
4
]
System:OrthorhombicColour:Greenish-yellow, yellow ...
Lustre:Vitreous, GreasyHardness:7
Name:Named by Gmelin in 1840 for the type locality, Faial Island (Fayal Island), Azores District (Azores Islands), Portugal.


Olivine Group. Fayalite-Forsterite Series, and the Fayalite-Tephroite Series. The Fe2+ analogue of Forsterite, Tephroite, and Calcio-Olivine.

Rare in nature, but common in iron slags.

Classification of Fayalite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:8/A.04-20
Nickel-Strunz 10th (pending) edition ID:9.AC.05

9 : SILICATES (Germanates)
A : Nesosilicates
C : Nesosilicates without additional anions; cations in octahedral [6] coordination
Dana 8th edition ID:51.3.1.1

51 : NESOSILICATES Insular SiO4 Groups Only
3 : Insular SiO4 Groups Only with all cations in octahedral [6] coordination
Hey's CIM Ref.:14.19.1

14 : Silicates not Containing Aluminum
19 : Silicates of Fe
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Type Occurrence of Fayalite

Type Locality:Faial Island (Fayal Island), Azores District, Portugal
Year of Discovery:1840

Physical Properties of Fayalite

Lustre:Vitreous, Greasy
Diaphaneity (Transparency):Transparent, Translucent
Colour:Greenish-yellow, yellow or brown
Streak:Colourless
Hardness (Mohs):7

Crystallography of Fayalite

Crystal System:Orthorhombic
Cell Parameters:a = 4.79Å, b = 10.39Å, c = 6.06Å
Ratio:a:b:c = 0.461 : 1 : 0.583
Unit Cell Volume:V 301.59 ų (Calculated from Unit Cell)

Optical Data of Fayalite

Type:Biaxial (-)
RI values: nα = 1.731 - 1.824 nβ = 1.760 - 1.864 nγ = 1.773 - 1.875
2V:Measured: 74° to 47°, Calculated: 54° to 66°
Maximum Birefringence:δ = 0.042 - 0.051

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Dispersion:weak

Chemical Properties of Fayalite

Formula:
Fe
2+
2
[SiO
 
4
]
Essential elements:Fe, O, Si
All elements listed in formula:Fe, O, Si
Common Impurities:Mn

Relationship of Fayalite to other Species

Series:Forms a series with Forsterite (see here)
Forms a series with Forsterite (see here)
Forms a series with Tephroite (see here)
Related to:
  • Olivine Group
    • Related Minerals - Nickel-Strunz Grouping):
    9.AC.05Forsterite
    Mg
     
    2
    		[SiO
     
    4
    		]
    9.AC.05Glaucochroite
    CaMn
    2+
     
    		[SiO
     
    4
    		]
    9.AC.05Kirschsteinite
    CaFe
    2+
     
    		[SiO
     
    4
    		]
    9.AC.05Laihunite
    Fe
    2+
     
    		Fe
    3+
    2
    		[SiO
     
    4
    		]
     
    2
    9.AC.05Liebenbergite
    (Ni,Mg)
     
    2
    		[SiO
     
    4
    		]
    9.AC.05Tephroite
    Mn
    2+
    2
    		[SiO
     
    4
    		]
    9.AC.10Monticellite
    CaMg[SiO
     
    4
    		]
    9.AC.15Ringwoodite
    (Mg,Fe
    2+
     
    		)
     
    2
    		[SiO
     
    4
    		]
    9.AC.20Chesnokovite
    Na
     
    2
    		[SiO
     
    2
    		(OH)
     
    2
    		] · 8H
     
    2
    		O
    Related Minerals - Hey's Index Grouping:
    14.19.2Ferrosilite
    Fe
     
    2
    		[SiO
     
    3
    		]
     
    2
    14.19.3Laihunite
    Fe
    2+
     
    		Fe
    3+
    2
    		[SiO
     
    4
    		]
     
    2
    14.19.4Ferro-anthophyllite
    ☐[Fe
    2+
    2
    		][Fe
    2+
    5
    		][(OH)
     
    2
    		|Si
     
    8
    		O
     
    22
    		]
    14.19.5Ferripyrophyllite
    Fe
     
    2
    		Si
     
    4
    		O
     
    10
    		(OH)
     
    2
    14.19.6Greenalite
    Fe
     
    2-3
    		Si
     
    2
    		O
     
    5
    		(OH)
     
    4
    14.19.7Cronstedtite
    Fe
    2+
    2
    		Fe
    3+
     
    		[(Si,Fe
    3+
     
    		)
     
    2
    		O
     
    5
    		](OH)
     
    4
    14.19.8Hisingerite
    Fe
    3+
    2
    		Si
     
    2
    		O
     
    5
    		(OH)
     
    4
    		·2H
     
    2
    		O

    Other Names for Fayalite

    Synonyms:
    FaialiteIron-Chrysolite
    German names:
    EisenglasEisenperidotFaialitFayalit
    Russian names:
    Фаялит
    Spanish names:
    FaialitaFayalita
    Varieties:
    HortonoliteKnebelite

    Other Information

    Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

    References for Fayalite

    Reference List:O'Neill, H.St.C. (1987) The quartz-fayalite-magnetite equilibria and free energies of formation of fayalite (Fe2SiO4) and magnetite (Fe3O4). American Mineralogist: 72: 67-75.

    Mineralogical Magazine (1998): 62: 607.

    Internet Links for Fayalite

    Search Engines:
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    • External Links:
  • Look for Fayalite on Webmineral
  • Look for Fayalite on Athena Mineralogy
  • Look for Fayalite on Wikipedia
  • Look for Fayalite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Fayalite in the Natural History Museum (London) online catalogue
  • Fayalite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Search for Fayalite at Thames Valley Minerals
  • Search for Fayalite on minvision.com
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    Localities for Fayalite

    Hide Locality List
    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Algeria
     
    • Lakhbi
    		www.meteoriticalsociety.org/bulletin/mb88.pdf.
    • Tamanghasset Province
      • Ahaggar Mts (Hoggar Mts)
        • Atakor volcanic massif
    		M. Girod, Bull. Soc. Franç. Minéral. Crist. , 1963, LXXXVI, pp. 121-125.
    M. Girod, Bull. Soc. Franç. Minéral. Crist. , 1963, LXXXVI, pp. 121-125.
    L. Latouche : "L'orthoferrosilite et les roches associées de la région des Gour Oumeladen (N.E. Ahaggar, Algérie)", Bull. Minéral. , 1983, 106, pp. 329-339.
    C. Lemanski, Jr. (re-entry lost Mindat data).
    Antarctica
    AmMin 36:361-367
    AmMin 36:361-367
    • Eastern Antarctica
      • Transantarctic Mtns
        • Pecora Escarpment
          • LaPaz Ice Field
    		http://aaa.wustl.edu/Work/pub_files/lap02205.html
    Australia
     
    • New South Wales
      • Yancowinna Co.
    		No reference listed
    • Queensland
      • Hinchinbrook Island
      • Mt Isa - Cloncurry area
        • Cloncurry District
    • Tasmania
    		Bottrill & Baker (in prep) Catalogue of minerals of Tasmania
      • Waterhouse district
    		Everard, J.L., Sutherland, F.L. and Zwingmann, H., 2004a. A Cretaceous phonolite dyke from the Tomahawk River, Northeast Tasmania. Papers and Proceedings of the Royal Society of Tasmania 138, 11-33.
    Austria
     
    • Salzburg
      • Hohe Tauern Mts
        • Rauris valley
          • Hüttwinkl valley
            • Alteck Mt. - Hoher Sonnblick Mt. area
              • Kolm-Saigurn
    		A. Strasser: Die MInerale Salzburgs (1989)
    • Styria
      • Bad Gleichenberg
        • Klause
    		Aufschluss 1972(SB), 52-55
      • Niedere Tauern Mts
        • Öblarn
          • Walchen
    		[Lapis 1992: 2 p.19-30]
    Brazil
     
    • North Region
      • Pará
        • Carajás mineral province
          • Canaã dos Carajás
    		Mineralium Deposita 43 (2008) 129-160.
    • Southeast Region
      • Minas Gerais
        • Doce valley
          • Governador Valadares
    Burma (Myanmar)
     
    • Mandalay Division
      • Sagaing District
        • Mogok
    		No reference listed
    Canada
     
    • British Columbia
      • Slocan Mining Division
        • Riondel
    		[var: Knebelite] No reference listed
    • Northwest Territories
      • Franklin District
    		Can. Mineral. (1993) 31, 775-785
    Chile
     
    • Magallanes y Antártica Chilena Region
      • Magallanes Province
    		Alan R. Woolley: Alkaline Rocks and Carbonatites of the World, part 1, 200 (BMNH, London, 1987)
    China
     
    • Anhui Province
      • Anqing Prefecture
        • Qianshan Co.
    		Am. Min. , V 84, pp. 564-569, 1999.
    • Liaoning Province (Manchuria; Dongbei Region)
      • Huludao Prefecture
        • Jianchang Co.
          • Bajiazi Zn-Pb-Ag deposit
    		[var: Knebelite] Yiming Zhao, Yongguan Dong, Daxin Li, and Chengsi Bi (2003): Ore Geology Reviews 23, 153-182.
    [var: Knebelite] Yiming Zhao, Yongguan Dong, Daxin Li, and Chengsi Bi (2003): Ore Geology Reviews 23, 153-182.; Yiming Zhao, Yongguan Dong, Daxin Li, and Chengsi Bi (2003): Ore Geology Reviews 23, 153-182.
    [var: Knebelite] Yiming Zhao, Yongguan Dong, Daxin Li, and Chengsi Bi (2003): Ore Geology Reviews 23, 153-182.
    [var: Knebelite] Yiming Zhao, Yongguan Dong, Daxin Li, and Chengsi Bi (2003): Ore Geology Reviews 23, 153-182.
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Pardubice Region
    		Prachař, I.: Současný stav výskytu nerostů ve Chvaleticích. Acta musei Reginaehradecensis, série A: vědy přírodní, 1981, roč. XVI., s. 99-102.
    Egypt
     
    • Alexandria
      • Abu Hommos
        • Nakhla
    Eritrea
     
    • Semenawi Keyih Bahri (Northern Red Sea) Region
      • Alid volcanic center
    		Journal of Petrology, Vol. 38, Nb 12, 1997, pp. 1707-1721.
    Finland
     
    • Etelä-Suomen Lääni
      • Southern Karelia
        • Wiborg
    		C. Lemanski, Jr. (re-entry of lost Mindat data).
    • Länsi-Suomen Lääni
    		No reference listed
    C. Lemanski, Jr. (re-entry of lost Mindat data).
      • Vaasa
        • Seinäjoki
    		No reference listed
    France
     
    • Auvergne
      • Haute-Loire
        • Le Puy-en-Velay
          • Espaly-Saint-Marcel
    		D. BARRIER, G. POURTIER & P. MEDARD, 2004, Minéralogie du Mont Denise (Haute-Loire), Le Cahier des Micromonteurs, 83, pp 3-8
        • Pradelles
          • Landos
    		C. Lemanski, Jr. (re-entry of lost Mindat data).
      • Puy-de-Dôme
        • Monts-Dore massif
          • Chastreix
    		Designolle, J.L. (1996). Massif du Sancy (Puy de Dôme). Le Cahier des Micromonteurs, (4), 8-9.
    • Languedoc-Roussillon
      • Lozère
    		No reference listed
    • Provence-Alpes-Côte d'Azur
      • Var
        • Les Mayons
    		G. MARI (1979) : Mines et minéraux de la Provence cristalline (Maures.Esterel.Tanneron). Ed. SERRES.(in French)
    French Polynesia
     
    • Mururoa Lagoon
      • Françoise
    		Ch. Wagner et al. , Bull. Minéral. , 1988, 111, pp. 523-534.
    Germany
     
    • Lower Saxony
      • Harz Mts
        • Bad Harzburg
    		No reference listed
          • Schmalenberg cliff
    		No reference listed
    No reference listed
    • North Rhine-Westphalia
      • Sauerland
        • Arnsberg
          • Hüsten
    		D. Pawlowski: "Mineralfundstellen im Sauerland", Weise (Munich), 1991
        • Iserlohn
          • Letmathe
    • Rhineland-Palatinate
      • Eifel Mts
        • Andernach
          • Eich
    		Hentschel, G., Zur Morphologie der Eifel-Olivine, Der Aufschluss, 391-396, 1983
          • Nickenich
    		Hentschel, G., Zur Morphologie der Eifel-Olivine, Der Aufschluss, 391-396, 1983
        • Daun
          • Strohn
    		Hentschel, G., Zur Morphologie der Eifel-Olivine, Der Aufschluss, 391-396, 1983
          • Üdersdorf
    		Hentschel, G., Zur Morphologie der Eifel-Olivine, Der Aufschluss 34, 391-396, 1983
        • Kelberg
          • Drees
    		Schüller, W., Die Mineralien des Niveligsberges bei Drees in der Eifel, Der Aufschluß SB 33, 1990
        • Mayen
          • Ettringen
    		Hentschel, G., Die Mineralien der Eifelvulkane, Weise (München), 1983
          • Hochsimmer volcano
    		Hentschel, G., Zur Morphologie der Eifel-Olivine, Der Aufschluss, 391-396, 1983
        • Niederzissen
          • Burgbrohl
    		Hentschel, G., Zur Morphologie der Eifel-Olivine, Der Aufschluss, 391-396, 1983
          • Hannebach
    		Hentschel, G., Die Mineralien der Eifelvulkane, Weise Verlag, München (2. Auflage), 1987
        • Polch
          • Ochtendung
    		Lapis 1988(7+8), 70-72
    • Saarland
      • Nonnweiler
        • Kastel
    		Thomas Kleser collection
    • Schleswig-Holstein
      • Bredstedt
        • Joldelund
    		A. Wittern: "Mineralfundorte in Deutschland", Schweizerbart (Stuttgart), 2001
    Greenland
     
    • Kitaa (West Greenland) Province
      • Arsuk
        • Arsuk Firth
    		No reference listed
      • Narsaq
    		[Mineralogical Record - Vol 24 No 2]
        • Qaqortoq (Julianehåb)
    		Journal of the Geological Society, 1981, Vol. 138, N° 3, pp. 289-306.
          • Nunarssuit Island
    		http://www.koeln.netsurf.de/~w.steffens/green.htm
    http://www.uni-tuebingen.de/uni/emi/ag-markl/pages/marks/pages/abstracts/EUG2001.html
        • Quagdlimiut
    		http://www.koeln.netsurf.de/~w.steffens/green.htm
    • Tunu (East Greenland) Province
      • Kangerlussuaq Firth
    		http://www.koeln.netsurf.de/~w.steffens/green.htm
        • Kangerlussuaq complex
    		Mineralogical Magazine, August 2004, Vol. 68(4), pp. 615–632
      • Kialineq Bay
    		http://www.koeln.netsurf.de/~w.steffens/green.htm
    Hungary
     
    • Fejér Co.
      • Velencei Mts.
        • Sukoró
    		Mineral Species of Hungary, 2005
    India
     
    • Bihar
      • Gaya District
    Israel
     
    Vapnik, Y., Sokol, E., Murashko M., Sharygin V. (2006): The enigma of Hatrurim. Mineralogical Almanac, 10, 69-77.
    Italy
     
    • Campania
      • Naples Province
        • Somma-Vesuvius Complex
          • Mt. Vesuvius
            • Torre del Greco
    		- Russo, M., Punzo, I. (2004): I minerali del Somma-Vesuvio, AMI
    Mariano Carati - Guida alla mineralogia vesuviana - Calderini, Bologna, 1982
    • Latium
      • Viterbo Province
        • Onano
    		Cresta, S., Duronio, F., Mancinella, D. (2002): Geositi e sistema delle arre protette del Lazio: idee per la geoconservazione. Il Cercapietre, 1-2/2002, 48-55
    • Lombardy
      • Varese Province
        • Ceresio Valley
    		No reference listed
        • Lake Lugano
          • Valganna
    		F. Bakos, A. del Moro, D. Visona, Eur. J. Mineral. , 1990, 2, pp. 373-383.
    • Piedmont
      • Verbano-Cusio-Ossola Province
        • Baveno
          • Oltrefiume
            • Mount Camoscio
    		Grill E. – (1935) I minerali del granito di Baveno; la fayalite. Periodico di Mineralogia – Roma pp. 129-133. and [MinRec 14:157]
    • Sardinia
      • Olbia-Tempio Pausania Province
        • Calangianus
    		- Gamboni, A., Gamboni, T., Pileri, P. (1997): Su alcuni minerali del massiccio granitico del monte Limbara zona "Furru e Conca", comune di Calangianus. Rivista Mineralogica Italiana, 2/1997, 123-134.
        • Sant'Antonio di Gallura
    		Gamboni, A., Gamboni, T. (1998) - Babingtonite e "Granati" delle pegmatiti granitiche della Gallura, Sardegna nord-orientale. Rivista Mineralogica Italiana, 4, Milano.
    • Sicily
      • Catania Province
        • Etna Volcanic Complex
          • Biancavilla
    		Di Franco, S. (1942): Mineralogia Etnea. Atti dell'Accademia Gioenia di Scienze Naturali, Serie IV, 5, 175 pp.
      • Trapani Province
    		Journal of Petrology (1998)
    • Trentino-Alto Adige
      • Bolzano Province (South Tyrol)
        • Sarentine Alps (Sarntal Alps)
          • Fortezza
            • Grasstein
    		Exel, R. (1987): Guida mineralogica del Trentino e del Sudtirolo. Athesia, Bolzano, 204 pp.
      • Trento Province
        • Fiemme Valley
    		De Michele, V. (1974). Guida mineralogica d'Italia. Istituto Geografico De Agostini, Novara, 2 vol.
    • Tuscany
      • Livorno Province
        • Piombino
    		Muenchener Micromounter-Lithothek
    Japan
     
    • Honshu Island
      • Chubu Region
        • Gifu Prefecture
          • Ena-gun
      • Chugoku Region
        • Hiroshima Prefecture
          • Hiroshima City
    		alfredo petrov specimens
      • Kanto Region
        • Tochigi Prefecture
          • Ashio
    		[var: Knebelite] Introduction to Japanese Minerals (Geological Survey of Japan, 1970)
    • Kyushu Island
      • Kagoshima Prefecture
        • Aira
    Mexico
     
    • Chihuahua
      • Mun. de Aquiles Serdán
        • Santa Eulalia District
          • West Camp
            • Francisco Portillo
    		Panczner (1987):94-366.
      • Pueblito de Allende
    		Imai H. and Yurimoto H. (2000).
    Mongolia
     
    • Hovd Aimag (Khovd Aimag)
      • Altai Mts
        • Khaldzan Buragtag Massif
          • Mount Ulyn Khuren
    		P. Kartashov et al. (2002) Can. Mineral. 40, 1641-1648
    Morocco
     
    Netherlands
     
    • Limburg
      • Kerkrade
    New Zealand
     
    • North Island
      • Bay of Plenty
        • Rotorua
          • Mt. Ngongotaha
    		Martin Stolworthy Collection
      • Lake Taupo
    		Collection of Rod Martin
      • Taupo
        • Atiamuri
    		Personal collection of Rod Martin
    Norway
     
    • Nordland
      • Lofoten
        • Austvågøya
          • Raftsundet
    		Griffin et al. (1974); Neumann (1985, p. 130).
    • Vestfold
      • Larvik
    		J. Hysingjord (1978, letter); Neumann (1985, p. 130).
        • Vardaasen
    		J. Hysingjord (1978, letter); Neumann (1985, p. 130).
    Oman
     
    • Dhofar (Al Janubiyah) Province
    The Meteoritical Bulletin, No. 88, 2004 JULY, Meteoritics & Planetary Science 39, Axxx–Axxx (2004)
    Portugal
     
    • Azores District
      • San Miguel
        • Agua de Pau Mts
          • Agua de Pau volcano
    		Cann, J.R., A second accurence of dalyite and the petrology of some ejected syenite blocks from Sao Miguel, Azores, Mineralogical Magazine, 36, 227-232, 1967
    Romania
     
    • Harghita Co.
    Russia
     
    • Eastern-Siberian Region
      • Saha Republic (Sakha Republic; Yakutia)
    		[World of Stones 12:49]
    • Far-Eastern Region
      • Primorskiy Kray
        • Sikhote-Alin
    		[var: Knebelite] American Mineralogist, Vol. 64, 1979, pp. 432-435
    • Mekensk
      • Grosnaja
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
    		www.koeln.netsurf.de/~w.steffens/khib.htm
            • Kukisvumchorr Mt
              • East slope
    		EJM 19, 95-103(2007)
    www.koeln.netsurf.de/~w.steffens/lovo.htm
    • Urals Region
      • Chelyabinsk Oblast'
        • Chelyabinsk coal basin
          • Kopeisk
    Saint Lucia
     
    • Choc
    		M. Le Guen de Kerneizon et al. , Bull. Minéral. , 1982, 105, pp. 203-211.
    • Grande Rivière Village
      • Morne Serpent hill
    		M. Le Guen de Kerneizon et al. , Bull. Minéral. , 1982, 105, pp. 203-211.
    Slovakia
     
    • Košice Region
      • Eastern Slovenské Rudohorie Mts
        • Dobšiná (Dobschau) Mining District
    		Háber,M., Hovorka,D., 1981: Ore mineralisation on the contact of an alpine type ultramafic body (Dankova, SGR Mnts). Geol.Zbor. – Geol.Carpath., 91 – 113
    Pauliš P., Ďuďa R., 2002:Nejznámejší mineralogická nalezište Slovenska. Kuttna, Kutná Hora, 136p
        • Rožňava (Rozsnyo; Rosenau) Mining District
          • Čučma (Csucsom; Tschutschma)
            • Stredná Hora hill
    		Koděra et all.,1990: Topografická mineralógia Slovenska, I-III, 1590p
    South Africa
     
    • Gauteng Province
    		Minerals of South Africa
    • Mpumalanga Province
      • Kromdraai 209 JR farm
    		Company web site
    • Northern Cape Province
    		[var: Knebelite] Minerals of South Africa
    • Northwest Province
      • Western Bushveld Complex
        • Rustenburg District
    		S.M.C. Verryn et al. : "Gold and associated ore minerals of the Waaikraal deposit, NorthWest of Brits, Bushveld Complex", Eur. J. Mineral. , 1991, 3, pp. 451-466.
    • Western Cape Province
      • Cold Bokkeveld Mts
    		www.lpi.usra.edu/meetings/metsoc2000/pdf/5306.pdf.
    Spain
     
    • Madrid
    		Garcia G., Gonzalez C., Bueno A. (2004) - Cadalso de los Vidrios (Madrid), Bocamina, n° 14, pp: 12-46.
    Sweden
     
    • Dalarna
      • Borlänge
    		[var: Knebelite]
      • Hedemora
        • Garpenberg
    		No reference listed
        • Hag mine ore field
    		[var: Knebelite]
    [var: Knebelite]
    [var: Knebelite]
      • Ludvika
    		[var: Knebelite]
    [var: Knebelite]
    Dana 6:457.
    [var: Knebelite]
    [var: Knebelite]
    Dana 6: 457.
    [var: Knebelite]
    [var: Knebelite]
      • Smedjebacken
    		[var: Knebelite]
    [var: Knebelite]
    • Gästrikland
      • Hofors
    		[var: Knebelite]
    [var: Knebelite]
    [var: Knebelite]
      • Ovanåker
    • Jämtland
      • Strömsund
    • Närke
      • Askersund
    		[var: Knebelite] No reference listed
        • Åmmeberg
    		No reference listed
    [var: Knebelite] No reference listed
      • Hallsberg
    		[var: Knebelite]
      • Örebro
    		[var: Knebelite]
    • Småland
      • Jönköping
        • Månsarp
    		S.Hjelmqvist: The titaniferous iron-ore deposit of Taberg in the southern part of Sweden. SGU C 512, 1950
    • Södermanland
      • Nyköping
        • Svärta ore field
    		No reference listed
      • Strängnäs
    		[var: Knebelite] No reference listed
    • Uppland
      • Östhammar
        • Dannemora
    		[var: Knebelite] No reference listed
      • Uppsala
        • Almunge
    		No reference listed
    • Värmland
      • Filipstad
    		[var: Knebelite] No reference listed
    Östra Värmlands Mineral Society,Långban,Sweden
    • Västmanland
      • Fagersta
        • Västanfors
      • Hällefors
        • Grythyttan
    		[var: Knebelite] No reference listed
    [var: Knebelite] No reference listed
      • Lindesberg
    		[var: Knebelite]
    [var: Knebelite]
    [var: Knebelite]
    [var: Knebelite]
      • Ljusnarsberg
    		[var: Knebelite] No reference listed
        • Kopparberg
    		No reference listed
    [var: Knebelite] No reference listed
    [var: Knebelite]
      • Nora
    		[var: Knebelite]
      • Norberg
    		[var: Knebelite]
    [var: Knebelite] No reference listed
    The Moon
     
    Lunar and Planetary Science XXXV (2004)
    Lunar and Planetary Science XXXIV (2003) and XXXV (2004)
    UK
     
    • England
      • Merseyside
        • Wirral
    		BMS Database
    • Scotland
      • Strathclyde (Bute)
    		www.abdn.ac.uk/geology/profiles/auming/pitchstone/pitchstones.htm.
    Ukraine
     
    USA
     
    • Arizona
      • Gila Co.
        • San Carlos Indian Reservation
    		Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 219; Mason, B. (1968), Kaersutite from San Carlos, AZ, with comments on the paragenesis of this mineral, Min.Mag.: 36: 997-1002; Galbraith, F.W. & D.J. Brannan (1959), Minerals of AZ: 95.
    Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 219; Mason, B. (1968), Kaersutite from San Carlos, Arizona, with comments on the paragenesis of this mineral, Min.Mag.: 36: 997-1002; Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 95.
    • California
      • Inyo Co.
        • Coso Hot Springs
    [www.johnbetts-fineminerals.com]
    • Colorado
      • Douglas Co.
        • Deckers Area
    		Minerals of Colorado (1997) Eckels, E. B.
    Minerals of Colorado (1997) Eckel, E. B.
    Minerals of Colorado (1997) Eckels, E. B.
      • El Paso Co.
    		U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    "Minerals of Colorado, updated & revised", p. 14, by Eckel, Edwin B., 1997
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    [AmMin 84:196]
        • Crystal Park
    		Minerals of Colorado (1997) Eckels, E. B.
    Minerals of Colorado (1997) Eckels, E. B.
        • Stove Mountain (Cookstove Mountain)
    		Minerals of Colorado (1997) Eckels, E. B.
      • Jefferson Co.
    		Minerals of Colorado (1997) Eckels, E. B.
      • Park Co.
    		Minerals of Colorado (1997) Eckels, E. B.
      • Teller Co.
    		Min Rec 36:2 pp143-185
    • Georgia
    		Minerals of Georgia: Their properties and occurrences. Robert Cook GGWRD Bull 92
        • Statham
    		Rocks & Min.:64:185; Teague(1956)
    • Hawaii
      • Honolulu Co.
        • Oahu Island
    		No reference listed
    • Idaho
      • Boise Co.
    		R&M 70:4 pp 242-263
      • Custer Co.
    		R&M 70:4 pp 242-263
      • Elmore Co.
    		R&M 70:4 pp 242-263
    Rocks & Min. 70:246
    • Maine
      • Hancock Co.
    		Wiebe et al., Journal of Petrology 38:393-423
      • Piscataquis Co.
        • Big Squaw Township
    		No reference listed
      • York Co.
    		King & Foord, 1994. Mineralogy of Maine, Vol.1., p.32
    • Massachusetts
      • Berkshire Co.
        • Cheshire
    		"Western Massachusetts Mineral Localities" by Plante, A.R., Valley Geology Press, 1992
      • Essex Co.
    		Gleba, 1978. Massachusetts Mineral & Fossil Localities
    Gleba, 1978. Massachusetts Mineral & Fossil Localities
    • Michigan
      • Marquette Co.
        • Marquette iron range
          • Republic
    		Mineralogy of Michigan (2004) Heinrich & Robinson
    • Nevada
      • Elko Co.
    		NBMG Spec. Pub. 31 Minerals of Nevada
      • Humboldt Co.
        • Opalite District
    		NBMG Spec. Pub. 31 Minerals of Nevada
      • Lincoln Co.
    		NBMG Spec. Pub. 31 Minerals of Nevada
      • Nye Co.
        • Mellan Mountain District
    		NBMG Spec. Pub. 31 Minerals of Nevada
        • Nellis Air Force range
    		NBMG Spec. Pub. 31 Minerals of Nevada
      • Pershing Co.
        • Dry Lake Pershing
    		www.meteorites4sale.net/MET_B.HTM
    • New Hampshire
      • Carroll Co.
        • Jackson
    		www.bates.edu/acad/depts/geology/jcreasy.WM.html.
      • Coos Co.
        • Carroll
    		No reference listed
        • Stark
    		[var: Knebelite] Meyers & Stewart (1956). The Geology of NH: Part III Minerals and Mines. p.43-44
      • Grafton Co.
        • Franconia
    		No reference listed
      • Rockingham Co.
    • New Jersey
      • Sussex Co.
        • Franklin Mining District
    		Brush (1871); Frondel, C.: Am. Min.:50:780-782 (1965); Dunn(1995):Pt3:336.Burns, R.G. & Huggins, F.E.: Am. Min.:57:967-985 (1972); Dunn(1995):Pt3:336.
          • Ogdensburg
            • Sterling Hill
    		Burns, R.G. & Huggins, F.E.: Am. Min.:57:967-985 (1972); Dunn(1995):Pt3:336.
    • New Mexico
    		Northrop, Minerals of New Mexico, 3rd Rev. Ed., 1996
    Minerals of New Mexico 3rd ed.
    Northrop, Minerals of New Mexico, 3rd Rev. Ed., 1996
    Minerals of New Mexico 3rd ed.
    • New York
      • Orange Co.
    		NY State Museum spec. no. 15894
          • Lake Mombasha
    		George Robinson & Steven Chamberlain (2007) Gazetteer of major New York State mineral localities. Rocks & Minerals, 82, #6, 472-483.
    • North Carolina
      • Yancey Co.
        • Day Book
    		C.W. Allen collection
    • Oregon
      • Lane Co.
    		No reference listed
          • North Sister Mountain
    • Pennsylvania
      • York Co.
        • Steelton quadrangle
    		Reed, Juliet C. (1976), Annotated Biblio. of Minerals New to the Pennsylvania List 1965-1974, The Mineralogical Society of PA, Inc.: 35; Smith, Robert C., II and Rose, Arthur W. (1972), "Major and Trace Elements in Differentiates of Triassic Diabase and T
    • Rhode Island
      • Providence Co.
    		[var: Knebelite] Yale Peabody Museum #671
    • Texas
      • Burnet Co.
    		R&M 66:3 pp 196-224
      • Randall Co.
    		Zhidong Xie et al. , Lunar and Planetary Science XXXVI (2005), 1216.pdf
    • Vermont
      • Rutland Co.
        • Shrewsbury
          • Cuttingsville
    		Rocks & Min. Vol. 71, (1996)
      • Windsor Co.
    		American Mineralogist 76:218-229, (1991).
    • Virginia
      • Gloucester Co.
    		Minerals of Virginia 1990 by R. V. Dietrich
      • Pittsylvania Co.
        • James River-Roanoke River Mn-Fe-Ba District
    		Rocks & Minerals 77:5 pp320-325
    • Washington
      • Okanogan Co.
        • Golden Horn Batholith
    		Micro Probe Volume VI Number 8
    • Wisconsin
    		www.uwrf.edu/~wc01
    R&M 73:11-12 pp 378-399 Wisconsin Mineral Locality Index
      • Marathon Co.
        • Stettin pluton
    		R&M 73:11-12 pp 378-399 Wisconsin Mineral Locality Index
        • Wausau pluton
    		R&M 73:11-12 pp 378-399 Wisconsin Mineral Locality Index
    Western Sahara
     
    • Dchira
    		Meteoritical Society Abstracts (2001)
    Mineral and/or Locality
    Google
     
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