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Gedrite

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Formula:
☐{Mg2}{Mg3Al2}(Al2Si6O22)(OH)2
The gedrite group are orthorhombic amphiboles in the magnesium-iron-manganese amphibole subgroup defined with A(Na+K+2Ca)<0.5 apfu and C(Al+Fe3++2Ti)>1 apfu

Gedrite is defined with Mg2+ as the dominant cation both in the B and C2+ positions and Al in the C3+ position.
Colour:
Pale greenish-grey to brown
Lustre:
Vitreous
Hardness:
5½ - 6
Crystal System:
Orthorhombic
Name:
Named after the type locality at Gèdres, Héas Valley, France
Hide all sections | Show all sections

Classification of GedriteHide

Approved, 'Grandfathered' (first described prior to 1959)
8/F.12-100
9.DD.05

9 : SILICATES (Germanates)
D : Inosilicates
D : Inosilicates with 2-periodic double chains, Si4O11; Orthoamphiboles
66.1.2.5

66 : INOSILICATES Double-Width,Unbranched Chains,(W=2)
1 : Amphiboles - Mg-Fe-Mn-Li subgroup
16.19.18

16 : Silicates Containing Aluminum and other Metals
19 : Aluminosilicates of Fe and Mg

Physical Properties of GedriteHide

Vitreous
Colour:
Pale greenish-grey to brown
Streak:
White
Hardness:
5½ - 6 on Mohs scale

Optical Data of GedriteHide

Type:
Biaxial (-)
RI values:
nα = 1.671 nβ = 1.681 nγ = 1.690
2V:
Measured: 75° , Calculated: 86°
Max Birefringence:
δ = 0.019
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r > v strong

Chemical Properties of GedriteHide

Formula:
☐{Mg2}{Mg3Al2}(Al2Si6O22)(OH)2

The gedrite group are orthorhombic amphiboles in the magnesium-iron-manganese amphibole subgroup defined with A(Na+K+2Ca)<0.5 apfu and C(Al+Fe3++2Ti)>1 apfu

Gedrite is defined with Mg2+ as the dominant cation both in the B and C2+ positions and Al in the C3+ position.
IMA Formula:
◻Mg2(Mg3Al2)(Si6Al2)O22(OH)2
Common Impurities:
Mn,Ca,Ti,Na,K

Crystallography of GedriteHide

Crystal System:
Orthorhombic
Cell Parameters:
a = 18.59 Å, b = 17.89 Å, c = 5.3 Å
Ratio:
a:b:c = 1.039 : 1 : 0.296
Unit Cell V:
1,762.65 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Type Occurrence of GedriteHide

Synonyms of GedriteHide

Other Language Names for GedriteHide

Varieties of GedriteHide

BidalotiteDescribed in 1937 as a new species of "orthopyroxene", with lilac colour.
SnarumiteProbably an iron-free variety of Gedrite.

Relationship of Gedrite to other SpeciesHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Anthophyllite-Gedrite Series3 photos of Gedrite associated with Anthophyllite-Gedrite Series on mindat.org.
Cordierite3 photos of Gedrite associated with Cordierite on mindat.org.
Anthophyllite3 photos of Gedrite associated with Anthophyllite on mindat.org.
Rutile3 photos of Gedrite associated with Rutile on mindat.org.
Sulphotsumoite3 photos of Gedrite associated with Sulphotsumoite on mindat.org.
Cerite-(Ce)3 photos of Gedrite associated with Cerite-(Ce) on mindat.org.
Almandine3 photos of Gedrite associated with Almandine on mindat.org.
Magnetite2 photos of Gedrite associated with Magnetite on mindat.org.
Tourmaline2 photos of Gedrite associated with Tourmaline on mindat.org.
1 photo of Gedrite associated with on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.DD.05Ferro-anthophyllite☐{Fe2+2}{Fe2+5}(Si8O22)(OH)2Orth.
9.DD.05Ferro-gedrite☐{Fe2+2}{Fe2+3Al2}(Al2Si6O22)(OH)2Orth.
9.DD.05Holmquistite☐{Li2}{Mg3Al2}(Si8O22)(OH)2Orth.
9.DD.05Proto-ferro-suenoite☐{Mn2+2}{Fe2+5}(Si8O22)(OH)2Orth.
9.DD.05Sodicanthophyllite{Na}{Mg2}{Mg5}(AlSi7O22)(OH)2Orth.
9.DD.05Sodic-ferro-anthophyllite{Na}{Fe2+2}{Fe2+5}(AlSi7O22)(OH)2Orth.
9.DD.05Sodic-ferrogedrite{Na}{Fe2+2}{Fe2+3Al2}(Al3Si5O22)(OH)2Orth.
9.DD.05Sodicgedrite{Na}{Mg2}{Mg3Al2}(Al3Si5O22)(OH)2Orth.
9.DD.05Ferro-holmquistite☐{Li2}{Fe2+3Al2}(Si8O22)(OH)2Orth.
9.DD.05Proto-anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2Orth. mmm (2/m 2/m 2/m)

Related Minerals - Dana Grouping (8th Ed.)Hide

66.1.2.1Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2Orth. mmm (2/m 2/m 2/m) : Pnma
66.1.2.8Sodicgedrite{Na}{Mg2}{Mg3Al2}(Al3Si5O22)(OH)2Orth.
66.1.2.9Holmquistite☐{Li2}{Mg3Al2}(Si8O22)(OH)2Orth.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

16.19.1IndialiteMg2Al3(AlSi5O18)Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
16.19.2Cordierite(Mg,Fe)2Al3(AlSi5O18)Orth. mmm (2/m 2/m 2/m) : Cccm
16.19.3Sekaninaite(Fe,Mg)2Al3(AlSi5O18)Orth.
16.19.4Ferro-gedrite☐{Fe2+2}{Fe2+3Al2}(Al2Si6O22)(OH)2Orth.
16.19.5StauroliteFe2+2Al9Si4O23(OH)Mon. 2/m : B2/m
16.19.6Chloritoid(Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2Mon. 2/m : B2/b
16.19.7AmesiteMg2Al(AlSiO5)(OH)4Tric. 1 : P1
16.19.8Corundophilite(Mg,Fe,Al)6(Si,Al)4O10(OH)8
16.19.9YoderiteMg(Al,Fe3+)3(SiO4)2O(OH)Mon. 2/m : P21/m
16.19.10Delessite(Mg,Fe,Fe,Al)(Si,Al)4O10(O,OH)8
16.19.11Ferrocarpholite(Fe2+,Mg)Al2(Si2O6)(OH)4Orth. mmm (2/m 2/m 2/m) : Ccca
16.19.12Magnesiocarpholite(Mg,Fe2+)Al2(Si2O6)(OH)4Orth.
16.19.13Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8Mon.
16.19.14Orthochamosite(Fe2+,Mg,Fe3+)5Al(AlSi3O10)(OH,O)8
16.19.15Berthierine(Fe2+,Fe3+,Al)3(Si,Al)2O5(OH)4Mon. m : Bm
16.19.16Odinite(Fe,Mg,Al,Fe,Ti,Mn)2.4((Si,Al)2O5)(OH)4Mon. m : Bm
16.19.17ClinochloreMg5Al(AlSi3O10)(OH)8Mon. 2/m : B2/m
16.19.19Magnesiogedrite☐{Mg2}{Mg3Al2}(Al2Si6O22)(OH)2
16.19.20Diabantite(Mg,Fe,Al)6((Si,Al)4O10)(OH)8
16.19.21SudoiteMg2Al3(Si3Al)O10)(OH)8Mon.
16.19.22VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2OMon. 2/m
16.19.23Corrensite(Mg,Fe)9((Si,Al)8O20)(OH)10 · nH2OOrth.

Other InformationHide

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

References for GedriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Mandarino, J.A. (1998) The Second List of Additions and Corrections to the Glossary of Mineral Species (1995). The Amphibole Group. Mineralogical Record: 29: 169-174.
Champness, P.E., Rodgers, K.A. (2000) The origin of iridescence in anthophyllite-gedrite from Simiuttat, Nuuk district, southern West Greenland. Mineralogical Magazine: 64: 885-889.
Hawthorne, F.C., Oberti, R. (2006) On the classification of amphiboles. The Canadian Mineralogist: 44: 1-21.
Schindler, M., Sokolova, E., Abdu, Y., Hawthorne, F.C., Evans, B.W., Ishida, K. (2008) The crystal chemistry of the gedrite-group amphiboles. I. Crystal structure and site populations. Mineralogical Magazine: 72: 703-730.
Hawthorne, F.C., Schindler, M., Abdu, Y., Sokolova, E., Evans, B.W., Ishida, K. (2008) The crystal chemistry of the gedrite-group amphiboles. II. Stereochemistry and chemical relations. Mineralogical Magazine: 72: 731-745.
Hawthorne, F.C., Oberti, R., Harlow, G.E., Maresch, W.V., Martin, R.F., Schumacher, J.C., Welch, M.D. (2012) Nomenclature of the amphibole supergroup. American Mineralogist: 97: 2031-2048.

Internet Links for GedriteHide

Localities for GedriteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Afghanistan
 
  • Badakhshan Province (Badakshan Province; Badahsan Province)
    • Khash & Kuran Wa Munjan Districts
      • Koksha Valley (Kokscha Valley; Kokcha Valley)
        • Sar-e Sang (Sar Sang; Sary Sang)
Deer, Howie and Zussman (1978) Rock-forming Minerals, Vol. 2A, Single-Chain Silicates. (2nd ed.)
Algeria
 
  • Tamanghasset Province
    • Ahaggar Mtn (Hoggar Mtn)
C. Lemanski, Jr. (re-entry lost Mindat data).
Australia
 
  • New South Wales
    • Georgiana Co.
      • Burraga
Sheppard, S., Walshe, J. L., & Pooley, G. D. (1995). Noncarbonate, skarnlike Au-Bi-Te mineralization, Lucky Draw, New South Wales, Australia. Economic Geology, 90(6), 1553-1569.
    • Yancowinna Co.
      • Northern Broken Hill Block
Econ Geol (1993) 88:505-541
  • Northern Territory
    • Central Desert Region
      • Harts Range (Harts Ranges; Hartz Range; Hartz Ranges)
        • Ambalindum Station
          • Mount Mabel
Warren, R.G., Stewart, A.J., Shaw, R.D. (1974) Summary of Information on Mineral Deposits of the Arunta Complex, Alice Springs area, NT. Department of Minerals and Energy, Bureau of Mineral Resources, Geology and Geophysics, Record 1974/17.
Vry, J.K.(1994): Boron-free Kornerupine from the Reynolds Range Arunta Block Central Australia, Mineralogical Magazine (Mar 1994): 58, 27-37.
      • Strangways Range
Wilson, A. F. (1977) A zincian högbomite and some other högbomites from the Strangways Range, Central Australia. Mineralogical Magazine, Vol.41, pp. 337-44.
Dampier Mining Company Ltd (1977) Exploration Licences 1341 and 1342. "Strangways Range" and "Hale River". Arunta Complex, Northern Territory Final Report CR77/139.
  • Queensland
    • Cloncurry Shire
      • Roxmere Station
2002. Rubenach, M. J. & Lewthwaite. Metasomatic albitites and related biotite rich schists from a low pressure polymetamorphic terrane, Snake Creek Anticline, Mount Isa Inlier, north-eastern Australia: microstructures and P-T-d paths. Journal of Metamorphic Geology, 20, 191-202
  • Tasmania
    • Huon Valley municipality
      • Huon-Channel region
        • Weld river district
Bottrill & Baker (in prep) Catalogue of minerals of Tasmania
    • Waratah-Wynyard municipality
      • Savage River district
Bottrill & Baker (in prep) Catalogue of minerals of Tasmania
    • West Coast municipality
      • Rosebery district
  • Western Australia
    • Sandstone Shire
      • Youangarra Goldfield (Curran's Find)
Ferguson, K.M. (1999) Lead, Zinc and Silver Deposits of Western Australia. Geological Survey of Western Australia, Mineral Resources Bulletin 15.
Botswana
 
  • North-East District
    • Francistown District
      • Selebi-Phikwe belt (Selbi-Pikwe)
Maier, W.D., Barnes, S.-J., Chinyepi, G., Barton, Jr., J.M., Eglington, B., and Setshedi, I. (2008): Mineralium Deposita 43, 37-60.
Brazil
 
  • Goiás
    • Sanclerlândia
Candia, M.A.F., and Gaspar, J.C. (1997): Mineralogy and Petrology 60, 27-40.
    • Uruaçu
Econ Geol (1986) 81:1884-1898; Kuyumjian, R. M. (2008). Magmatic arc and associated gold, copper, silver, and barite deposits in the state of Goiás, central Brazil: characteristics and speculations. Brazilian Journal of Geology, 30(2).
Canada
 
  • Manitoba
Bernier, Louis R., 1990, Vanadiferous Zincian-Chromian Hercynite in a Metamorphosed Basalt-Hosted Alteration Zone, Atik Lake, Manitoba, Canadian Mineralogist (1990) v. 28:57-50.
    • Snow Lake District
Calvert C. Bristol and Edgar Froese (1989) Highly metamorphosed altered rocks associated with the Osborne Lake volcanogenic massive sulfide deposit, Snow Lake area, Manitoba Can Mineral, 27:593-600
  • Ontario
    • Kenora District
      • Balmer Township
Charles A. Tarnocai, Keiko Hattori, and Louis J. Cabri (1997) "Invisible" gold in sulfides from Campbell Mine, Red lake greenstone belt, Ontario; evidence for mineralization during the peak of metamorphism. Can Mineral 35:805-815
    • Thunder Bay District
      • Gemmell Township
Contributions to Mineralogy and Petrology Volume 101, Number 3 / March, 1989 Pages 350-360; Franklin, J M, Schnieders, B R, Koopman, E R (1991) Mineral Deposits in the western Superior Province, Ontario (Field Trip 9) Geological Survey of Canada, Open File 2164; Economic Geology April 1986 v. 81 no. 2 p. 323-342
Can Mineral February 1997 v. 35 no. 1 p. 105-118
  • Québec
    • Outaouais
      • Pontiac RCM
Econ Geol. (1990) 85:164-171
China
 
  • Hebei Province
    • Baoding Prefecture
      • Fuping Co.
Guochun Zhao, Min Sun, Wilde, S.A., and Jinghui Guo (2004), In: Malpas, J., Fletcher, C.J.N., Ali, J.R., and Aitchison, J.C. (eds.): Aspects of the Tectonic Evolution of China. Geological Society, London, Special Publications 226, pp. 27-55
  • Inner Mongolia Autonomous Region
    • Xilin Gol League (Xilinguole Prefecture)
      • Plain Blue Banner (Zhenglan Co.)
Yiming Zhao, Daxin Li, Liangshi Wu, Wenming Chen, Chengyou Feng, Peihua Wang, and Xuedong Gao (2008): Mineral Deposits 27(4), 425-448
  • Shanxi Province
    • Xinzhou Prefecture
      • Dai Co.
        • Yanmenguan
Songnian Lu, Huaikun Li, and Yongqing Tian (2003): Geological Survey and Research 26(1), 15-20
Finland
 
  • Eastern Finland Region
Grew, E.S., Pertsev, N.N., Vrána, S., Yates, M.G., Shearer, C.K., and Wiedenbeck, M. (1998): Contributions to Mineralogy and Petrology 131, 22-38.
  • Southwestern Finland Region
    • Salo
      • Perniö
http://www.gsf.fi/explor/zinc/traskbole.htm
      • Suomusjärvi
Niskanen, Maria (2014). Salitun felsisten juonten mineraalikoostumus ja evoluutio. Pro Gradu-tutkielma (2014). Geotieteiden ja Maantieteen Laitos Helsingin Yliopisto.gedrite
France
 
  • Auvergne-Rhône-Alpes
    • Haute-Loire
      • Auzon
        • Azérat
Bull. Minéral. , 1987, 110, pp. 359-371.
      • Brioude
        • Paulhac
P.G. Pélisson : "Etude Minéralogique et Métallogénique du District Filonien Polytype de Paulhaguet (Haute-Loire, Massif Central Français)", Doctorate Thesis, Orléans, France, 1989 ; F.H. Forestier : "Les Péridotites Serpentinisées en France", Fascicule IV, BRGM, 1964
        • Vieille-Brioude
P.G. Pélisson : "Etude Minéralogique et Métallogénique du District Filonien Polytype de Paulhaguet (Haute-Loire, Massif Central Français)", Doctorate Thesis, Orléans, France, 1989
      • Lavoûte-Chilhac
        • Saint-Cirgues
F.H. Forestier : "Les Péridotites Serpentinisées en France", Fascicule 4 Haut- Allier, BRGM, 1964
F.H. Forestier : "Les Péridotites Serpentinisées en France, Groupe I, Fascicule IV, Bassin du Haut Allier", BRGM, 1964
        • Villeneuve d'Allier
F.H. Forestier : "Les Péridotites Serpentinisées en France, Groupe I, Fascicule IV, Bassin du Haut Allier", BRGM, 1964
F.H. Forestier : "Les Péridotites Serpentinisées en France, Groupe I, Fascicule IV, Bassin du Haut Allier", BRGM, 1964
F.H. Forestier : "Les Péridotites Serpentinisées en France, Groupe I, Fascicule IV, Bassin du Haut Allier", BRGM, 1964
      • Lubilhac
P.G. Pélisson : "Etude Minéralogique et Métallogénique du District Filonien Polytype de Paulhaguet (Haute-Loire, Massif Central Français)", Doctorate Thesis, Orléans, France, 1989 ; F.H. Forestier : "Les Péridotites Serpentinisées de France", Fascicule IV, BRGM, 1964
      • Paulhaguet
        • Salzuit
      • Pinols
        • Desges
P.G. Pélisson : "Etude Minéralogique et Métallogénique du District Filonien Polytype de Paulhaguet (Haute-Loire, Massif Central Français)", Doctorate Thesis, Orléans, France, 1989
      • Saugues
        • Venteuges
          • La Bastide
P.G. Pélisson : "Etude Minéralogique et Métallogénique du District Filonien Polytype de Paulhaguet (Haute-Loire, Massif Central Français)", Doctorate Thesis, Orléans, France, 1989
      • Torsiac
        • Lanau
F.H. Forestier : "Les Péridotites Serpentinisées en France, Groupe I, Fascicule IV, Bassin du Haut Allier", BRGM, 1964
  • Occitanie
    • Aveyron
      • Almont-les-Junies
R. Pierrot, R. Pulou, P. Picot : "Inventaire Minéralogique de la France N° 7 : Aveyron", BRGM, 1977
    • Hautes-Pyrénées
AM 63 (1978), 1023
Germany
 
  • Baden-Württemberg
    • Black Forest
      • Elz valley
K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
  • Lower Saxony
    • Harz
      • Bad Harzburg
        • Schmalenberg cliff
No reference listed
No reference listed
Greenland
 
  • Sermersooq
    • Nuuk (Godthåb)
Bøggild, O.B. (1953): The Mineralogy of Greenland. Meddelelser om Grønland, Bd. 149. Nr. 3. 445 pages [p.192]
Petersen, O. V. & Secher, K. (1993): The Minerals of Greenland. Mineralogical Record 24 (2): 1-67
        • Bjørnesund
Friend, C.R.L. (1982): A1-Cr substitution in peraluminous sapphirines from the Bjoernesund area, Fiskenaesset region, southern West Greenland. Mineralogical Magazine. 46, 323-328
Bøggild, O.B. (1953): The Mineralogy of Greenland. Meddelelser om Grønland, Reitzels Forlag København. Bd. 149. Nr. 3. 445 pages [p.193-194]; Grew, E., Herd, R., Marquez, N. (1987): Boron-bearing Kornerupine from Fiskenaesset, West Greenland: a re-examination of specimens from the type locality, Mineralogical Magazine,51, 695-708
Ackermand, D., Windley, B.F., Herd R.K. (1983): Magnesian Högbomite in a Sapphirine-bearing rock from the Fiskenaesset region, W. Greenland, Mineralogical Magazine, Vol. 47, 555-561
Peter W. Uitterdijk Appel (1986) Gahnite in an Archaean Iron-Formation, West Greenland. Mineralogical Magazine 50:175-177.
Mineralogical Magazine 1996 60 : 937-947; P. E. Champness and K. A. Rodgers (2000): The origin of iridescence in anthophyllite-gedrite from Simiuttat, Nuuk district, southern West Greenland. Mineralogical Magazine 64, 885-889.
India
 
  • Karnataka
    • Tumkur District
      • Koratagere Taluk
B. Rama Rao and L. Rama Rao (1937) Proceedings: Plant Sciences, 5, #6.
Italy
 
  • Piedmont
    • Cuneo Province
[MinRec 27:303]
      • Varaita Valley
        • Brossasco
Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007). Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
    • Torino Province
      • Canavese District
        • Léssolo
          • Cálea
Le miniere di Brosso (2001)-Italo Campostrini- ed. Museo Regionale Torino
Japan
 
  • Honshu Island
    • Chugoku Region
      • Tottori Prefecture
        • Hino-gun
          • Nichinan-cho
Jun-ichi Kitahara (1965) Hydrophlogopite from the Wakamatsu chromite mine, Tottori Prefecture. The Journal of the Japanese Association of Mineralogists, Petrologists and Economic Geologists, 54, #1, 32-38.
  • Shikoku Island
    • Ehime Prefecture
      • Shikokuchuo City
        • Doi
Madagascar
 
  • Antananarivo Province
    • Vakinankaratra Region
Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
New Caledonia
 
  • Southern Province
    • Yaté Commune
Wells, M.A., Ramanaidou, E.R., Verral, M., and Tessarolo, C., (2009) Mineralogy and crystal chemistry of “garnierites” in the Goro lateritic nickel deposit, New Caledonia. European Journal of Mineralogy, 21, p.467-483
New Zealand
 
  • South Island
    • Southland
      • Fiordland
C. M. Ward (1984) Magnesium staurolite and green chromian staurolite from Fiordland, New Zealand . American Mineralogist, Volume 69, pages 531-540.
Norway
 
  • Akershus
    • Nesodden
      • Nesoddtangen
  • Aust-Agder
    • Froland
D.Visser; The metamorphic evolution of the bamble sector, south Norway, Geologica Ultraiectina No.103, University of Utrecht, Netherlands. 1993
    • Risør
      • Søndeled
Kihle, J.B. (2013): World's greatest cordierite find? Norsk Bergverksmuseum Skrifter. 50, 59-62
    • Tvedestrand
Kihle, 1989: Polymetamorphic Evolution of the Cordierite-bearing metapelites of Bamble-sector, SE Norway. Thesis, Univ. Oslo
      • Snaresund
Touret, J. & De La Roche, H. (1971): Contribution to the mineralogy of Norway , No. 45. Saphirine à Snaresund, prés de Tvedestrand (Norvége Méridionale). Norsk Geologisk Tidsskrift 51, 170-175
  • Buskerud
    • Modum
      • Skuterud Mines (Skutterud Mines; Modum Cobalt Mines)
Norges geologiske undersøkelse.Malmdatabasen. Skuterud Mellomgruver. Forekomst nr.21 i Modum (0623) kommune
      • Snarum
Jøsang, Ottar (1966): Geologiske og petrologiske undersøkelser i Modumfeltet. Norges Geologiske Undersøkelse nr 235, 91-97. [p.72]
Jøsang, Ottar (1966): Geologiske og petrologiske undersøkelser i Modumfeltet. Norges Geologiske Undersøkelse: 235: 91-97. [p. 70]
  • Nordland
    • Hemnes
      • Bleikvassli
Rosenberg, J.L., Spry, P.G., Jacobson, C.E., and Vokes, F.M. (2000): The effects of sulfidation and oxidation during metamorphism on compositionally varied rocks adjacent to the Bleikvassli Zn-Pb-(Cu) deposit, Nordland, Norway. Mineralium Deposita 35, 714-726.
  • Sør-Trøndelag
    • Holtålen
      • Haltdalen
Nilsen, O. (1971). Sulphide mineralization and wall rock alteration at RØdhammeren mine, Sør TrØndelag, Norway. Norsk geol. tidsskr, 51, 329-354.
  • Telemark
Van King
Wilke, H.-J. (1976): Mineral-Fundstellen Band 4: Skandinavien. Chr. Weise Verlag, München, p. 73-74
Russia
 
  • Far-Eastern Region
    • Magadanskaya Oblast'
      • Kolyma River Basin
        • Ducat District
          • Omsukchan
Filimonova, L.G., and Trubkin, N.V. (2008): Geology of Ore Deposits 50(2), 135-144.
  • Northern Region
    • Karelia Republic
      • Northern Karelia
Nikolay Serebryakov data
        • Loukhi
          • Tedino
            • Dyadino lake
P.M. Kartashov data
- Yu.A.Kozhevnikov (2010) Samotsvetnye tropy,Moscow,Mir Samotcvetov, 56p (in Rus.)
  • Urals Region
    • Middle Urals
      • Sverdlovskaya Oblast'
Gregor Borg et al (2001) Deep Exhumation and Tectonic Emplacement of the Nishni Tagil Ultramafic Complex and its Platinum Ores, Urals, Russia in (2001) European Union of Geosciences Conference XI (OS6)
South Africa
 
  • Northern Cape Province
    • Namakwa District (Namaqualand)
Contrib Mineral Petrol (1985) 91 : 369 382
Contrib Mineral Petrol (1985) 91 : 369 382
Spain
 
  • Catalonia
    • Girona (Gerona)
      • Alt Empordà
        • Cadaqués
Bareche, E. (2005) "Els minerals de Catalunya. Segle XX" Ed. Museu Mollfulleda de Mineralogia - Grup Mineralògic Català, 269 p.
  • Galicia
    • A Coruña (La Coruña)
      • Santiago de Compostela
        • Aríns
Pascual, E; Estévez, A. (1981) Estudio geológico del yacimiento de Fornás (Santiago). Cuaderno do Laboratorio Xeolóxico de Laxe 2 (vol II):191-211; ATLANTI, C., & BISCAY, B. (1983). The mineralogy and metamorphism of some gahnite-bearing silicate inclusions in massive sulphides from Fornas, north-west Spain. Mineralogical Magazine, 47, 233-235.
Sri Lanka
 
  • Central Province
Kriegsman, L. M., & Schumacher, J. C. (1999). Petrology of sapphirine-bearing and associated granulites from central Sri Lanka. Journal of Petrology, 40(8), 1211-1239.
Sweden
 
  • Dalarna
    • Falun
Lasskogen, J. (2010). Volcanological and volcano-sedimentary facies stratigraphical interpretation of the Falun Cu-Zn-Pb-(Ag-Au) sulphide deposit, Bergslagen district, Sweden. MS Thesis
    • Hedemora
      • Garpenberg
Öhman, L., F. Grensman (2000): Garpenberg (Södra). Litofilen, 17, 29-38
    • Ludvika
      • Grängesberg
      • Saxberget ore field
    • Rättvik
No reference listed
    • Smedjebacken
Wilke, H.-J. (1976): Mineral-Fundstellen Band 4: Skandinavien. Chr. Weise Verlag, München, 370 pp. (p.209)
Michael C. Roarke Photo & specimen (Visually identified ?)
33 IGC excursion No 12, August 14 – 20, 2008
  • Hälsingland
    • Ljusdal
No reference listed
  • Värmland
    • Filipstad
Damman, A.: (1988): Hydrothermal Subsilicic Sodium Gedrite from the Gåsborn Area, West Bergslagen, Central Sweden. Mineralogical Magazine. 52 : 193-200
Nysten, P., Holtstam, D. and Jonsson, E. (1999) The Långban minerals. In Långban - The mines,their minerals, geology and explorers (D. Holtstam and J. Langhof, eds.), Swedish Museum of Natural History and Raster Förlag, Stockholm & Chr. Weise Verlag, Munich, pp. 89-183.
      • Nordmark district
No reference listed
No reference listed
No reference listed
      • Persberg district
  • Västmanland
    • Ljusnarsberg
      • Kopparberg
No reference listed
    • Nora
    • Norberg
Ounchanum, P. & Morad, S. (1987): Paragenesis of akatoreite and ganophyllite in the manganiferous rocks of the Häste Field, Norberg ore district, central Sweden. Neues Jahrbuch für Mineralogie, Abhandlungen 157, 225-244.
No reference listed
Switzerland
 
  • Ticino (Tessin)
    • Riviera
Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 179.
Tajikistan
 
  • Viloyati Mukhtori Gorno-Badakhshan (Viloyati Badakhshoni Kuni)
    • Pamir Mts
      • Pyandzh River Valley
Grew, E.S., Pertsev, N.N., Vrána, S., Yates, M.G., Shearer, C.K., and Wiedenbeck, M. (1998): Contributions to Mineralogy and Petrology 131, 22-38.
UK
 
  • Scotland
    • North West Highlands
      • Drumnadrochit
BMS Database
BMS Database
[Specimen in the Natural History Museum, London]
USA
 
  • Arizona
    • Santa Cruz Co.
      • Patagonia Mts
        • Patagonia District
Schrader, F.C. and J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, AZ, USGS Bull. 582: 328.
            • Nash Mines group (Duquesne-Washington group)
Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 334.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 230; Schrader, F.C. and J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, AZ, USGS Bull. 582; Galbraith, F.W. & Brennan (1959), Minerals of AZ: 91.
  • Colorado
    • Boulder Co.
Minerals of Colorado (1997) Eckels, E. B.
    • Chaffee Co.
      • Monarch District
The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
      • Sedalia District
("Minerals of Colorado, updated & revised", by Eckel, Edwin B., 1997)
Minerals of Colorado (1997) Eckels, E. B.
    • Clear Creek Co.
Minerals of Colorado (1997) Eckels, E. B.
    • Gilpin Co.
Minerals of Colorado (1997) Eckels, E. B.
    • Gunnison Co.
Journal of Petrology (1991) 32:6 Pages 1169-1201
    • Jefferson Co.
Minerals of Colorado (1997) Eckels, E. B.
      • Morrison Area
Minerals of Colorado (1997) Eckels, E. B.
Minerals of Colorado (1997) Eckels, E. B.
  • Connecticut
    • Middlesex Co.
Lundgren, Lawrence, Jr. (1979), The Bedrock Geology of the Haddam Quadrangle. State Geological and Natural History Survey of Connecticut. Quadrangle Report 37.
      • Deep River
Observation by Jeremy Zolan
      • Haddam
Lundgren, Lawrence, Jr. (1979): THE BEDROCK GEOLOGY OF THE HADDAM QUADRANGLE. State Geological and Natural History Survey of Connecticut. Quadrangle Report No. 37: 9-13.
        • Haddam Neck
Schooner, Richard. (circa 1985), Untitled manuscript on central Connecticut mineralogy.
  • Georgia
    • Douglas Co.
      • Villa Rica
Rocks & Min.: 64:194.
    • Rabun Co.
American Mineralogist, Volume 72, pages 1086-1096, 1987
  • Idaho
    • Clearwater Co.
      • Orofino District
Hietanen, Anna, 1959, Kyanite-Garnet Gedritite near Orofino, Idaho, American Mineralogist, 44: 539-564.
  • Maine
    • Cumberland Co.
      • Harpswell
www.maine.gov/doc/nrimc/mgs/explore/bedrock/b42/harpswell.htm
www.maine.gov/doc/nrimc/mgs/explore/bedrock/b42/harpswell.htm
    • Oxford Co.
      • Grafton
King & Foord, 1994. Mineralogy of Maine, Vol.1, p.29.
  • Massachusetts
    • Essex Co.
Gleba, 1978. Massachusetts Mineral & Fossil Localities
    • Franklin Co.
Emerson, B. K. (1895): A Mineralogical Lexicon of Franklin, Hampshire, and Hampden Counties, Massachusetts (USGS Bulletin 126).
    • Hampshire Co.
Emerson, 1917. Geology of Mass. & Rhode Island, p.71-2
  • Montana
    • Beaverhead Co.
      • Ruby Range
Gobla, M.J. (2012) Montana mineral locality index. Rocks & Minerals, 87, #3, 208-240.
    • Madison Co.
Burger, H.R. et. al. (2004) Geology and geochemistry of the Spuhler Peak metamorphic suite: in Precambrian Geology of the Tobacco Root Mountains, Montana: Geological Society of America Special Paper 377: 47-70
  • Nevada
    • Clark Co.
NBMG Spec. Pub. 31 Minerals of Nevada
  • New Hampshire
http://kilburn.keene.edu/Research/WestCentralNH/
Schumacher and Robinson, 1987: Journal of Petrology 28 (6):1033-1073
Schumacher, J.C. and Robinson, Peter (1987). Mineral chemistry and metasomatic growth of aluminous enclaves in gedrite-cordierite gneiss, southwestern New Hampshire, Journal of Petrology 28:1033-1073
    • Grafton Co.
      • Lisbon
P Cristofono collection
  • North Carolina
    • Buncombe Co.
Wood, Keith Yates (1996) Petrogenesis And Geochemistry Of Kyanite-Bearing Pegmatites In The Buncombe Pegmatite District, North Carolina :Virginia Polytechnic Institute and State University
Wilson,W.F and McKenzie,B.J,1978,Mineral Collecting Sites in North Carolina,Information Circular 24
J.J Papike and Malcolm Ross,1970,Gedrites:Crystal Structures And Intra-Crystalline Cations Distribution:The American Mineralogist,Vol.55,Nov-Dec,1970
Self Collected Bruce Osborne
  • Oklahoma
    • Ottawa Co.
U.S. Geological Survey,2005, Mineral Resources Data System: U.S Geological Survey,Reston, Virginia
U.S. Geological Survey,2005, Mineral Resources Data System: U.S Geological Survey,Reston, Virginia
U.S. Geological Survey,2005, Mineral Resources Data System: U.S Geological Survey,Reston, Virginia
U.S. Geological Survey,2005, Mineral Resources Data System: U.S Geological Survey,Reston, Virginia
U.S. Geological Survey,2005, Mineral Resources Data System: U.S Geological Survey,Reston, Virginia
U.S. Geological Survey,2005, Mineral Resources Data System: U.S Geological Survey,Reston, Virginia
U.S. Geological Survey,2005, Mineral Resources Data System: U.S Geological Survey,Reston, Virginia
U.S. Geological Survey,2005, Mineral Resources Data System: U.S Geological Survey,Reston, Virginia
U.S Geological Survey (2005) Mineral Resources Data System :U.S Geological Survey,Reston, Virginia
U.S. Geological Survey,2005, Mineral Resources Data System: U.S Geological Survey,Reston, Virginia
U.S. Geological Survey,2005, Mineral Resources Data System: U.S Geological Survey,Reston, Virginia
U.S. Geological Survey,2005, Mineral Resources Data System: U.S Geological Survey,Reston, Virginia
U.S. Geological Survey,2005, Mineral Resources Data System: U.S Geological Survey,Reston, Virginia
U.S. Geological Survey,2005, Mineral Resources Data System: U.S Geological Survey,Reston, Virginia
U.S. Geological Survey,2005, Mineral Resources Data System: U.S Geological Survey,Reston, Virginia
U.S. Geological Survey,2005, Mineral Resources Data System: U.S Geological Survey,Reston, Virginia
U.S Geological Survey,2005, Mineral Resources Data System:U.S. Geological Survey,Reston, Virginia
U.S Geological Survey (2005) Mineral Resources Data System :U.S Geological Survey,Reston, Virginia
U.S. Geological Survey,2005, Mineral Resources Data System: U.S Geological Survey,Reston, Virginia
U.S. Geological Survey,2005, Mineral Resources Data System: U.S Geological Survey,Reston, Virginia
U.S. Geological Survey,2005, Mineral Resources Data System: U.S Geological Survey,Reston, Virginia
      • Tri-State District
        • Picher Field
          • Cardin
U.S. Geological Survey,2005, Mineral Resources Data System: U.S Geological Survey,Reston, Virginia
U.S. Geological Survey,2005, Mineral Resources Data System: U.S Geological Survey,Reston, Virginia
U.S. Geological Survey,2005, Mineral Resources Data System: U.S Geological Survey,Reston, Virginia
U.S Geological Survey (2005) Mineral Resources Data System :U.S Geological Survey,Reston, Virginia
  • Vermont
    • Windsor Co.
Rocks & Min. Vol. 71, (1996)
        • Mt Cube Quadrangle
Spear, Frank, 1982. in Journal of Petrology 23(3):383-426
  • Virginia
    • Floyd Co.
      • Floyd
Minerals of Virginia 1990 by R. V. Dietrich
  • Wisconsin
    • Jackson Co.
Kimball, Karen, 1979, "Co-existing amphiboles at Black River Falls, Wisconsin", Abst. 25th Annual Institute on Lake Superior Geology, Duluth, U of M-Duluth, p. 22-23.
    • Oconto Co.
R&M 73:11-12 pp 378-399 Wisconsin Mineral Locality Index
Zimbabwe
 
  • Mashonaland West
    • Zambezi Belt
J. Petrology (2002) 43 (2): 271-290.
Mineral and/or Locality  
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