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Iddingsite

Formula:
MgO·Fe
 
2
O
 
3
·3SiO
 
2
·4H
 
2
O
System:OrthorhombicHardness:3


An alteration product of Olivine.

Classification of Iddingsite

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Physical Properties of Iddingsite

Hardness (Mohs):3

Crystallography of Iddingsite

Crystal System:Orthorhombic

Optical Data of Iddingsite

Type:Biaxial (-)
RI values: nα = 1.670 - 1.730 nβ = 1.700 - 1.760 nγ = 1.720 - 1.770
Maximum Birefringence:δ = 0.050

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

Chemical Properties of Iddingsite

Formula:
MgO·Fe
 
2
O
 
3
·3SiO
 
2
·4H
 
2
O
Essential elements:Fe, H, Mg, O, Si
All elements listed in formula:Fe, H, Mg, O, Si

Other Names for Iddingsite

Synonyms:
Oroseite
German names:
IddingsitOroseit
Spanish names:
IddingsitaOroseita

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.

Internet Links for Iddingsite

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  • Search for Iddingsite at Thames Valley Minerals
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • The Arkenstone - Fine Minerals
  • Search for Iddingsite on minvision.com
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    Localities for Iddingsite

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    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.
    Antarctica
    AmMin 36:361-367
    AmMin 36:361-367
    Austria
     
    • Burgenland
      • Oberpullendorf
        • Kobersdorf
          • Pauliberg Mt.
    		R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
    • Styria
      • Bad Gleichenberg
        • Kapfenstein
    		R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
    Brazil
     
    • South Region
      • Paraná
        • Foz do Iguaçu
    		Geological Survey Professional Paper 327 (U.S. Department of the Interior, 1959)
    Canada
     
    • Yukon Territory
      • Whitehorse Mining District
        • Carcross
          • Tagish Lake
    		Lunar and Planetary Science XXXII (2001)
    China
     
    • Heilongjiang Province (Manchuria; Dongbei Region)
      • Yichun Prefecture
        • Hongxing District
    		http://wrgis.wr.usgs.gov/open-file/of03-220/DATABASE/lode_deposits.txt
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Liberec Region
    		Pauliš, P.: Nejzajímavější mineralogická naleziště Čech. Kutná Hora: Kuttna, 2000, s. 57-58.
    Egypt
     
    • Alexandria
      • Abu Hommos
        • Nakhla
    Finland
     
    • Etelä-Suomen Lääni
      • Southern Karelia
        • Wiborg
    		C. Lemanski, Jr. (re-entry of lost Mindat data).
    France
     
    • Midi-Pyrénées
      • Aveyron
        • Villefranche-de-Rouergue
          • Bage reservoir
    		G. Trolliard et al. , Bull. Minéral; , 1987, 110, pp. 439-448.
    • Rhône-Alpes
      • Ardèche
        • Plateau des Coirons
          • Alissas
    		Bull. Soc. Franç. Minéralo. Cristallo. , 1974, 97, pp. 450-464.
    Italy
     
    • Campania
      • Naples Province
        • Somma-Vesuvius Complex
          • Monte Somma
            • Pollena - Trocchia area
    		Carati M., 1982. Guida alla mineralogia vesuviana. Guide Calderini, Bologna.
    M. Carati - Guida alla mineralogia vesuviana - Calderini, Bologna, 1982
    • Liguria
      • Genova Province
        • Rossiglione
    		Antofilli, Borgo, Palenzona, 1985. I nostri minerali. Geologia e mineralogia in Liguria. Edizioni Melita, La Spezia.
    Norway
     
    • Finnmark
      • Loppa
        • Øksfjord
    		S. Elvevold and H. Reginiussen, Eur. Journ. Mineral. , 1996, 8, pp. 777-789.
    Poland
     
    • Opolskie
      • Opole
        • Gracze quarry
    		W. Szeliga, Mineralogical Society of Poland, Special Papers, 2003, V 23, pp. 166-168.
    Saint Lucia
     
    • Choc
    		M. Le Guen de Kerneizon et al. , Bull. Minéral. , 1982, 105, pp. 203-211.
    Slovakia
     
    • Banská Bystrica Region
      • Cérová Mts
    		Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
    Sweden
     
    • Småland
      • Jönköping
        • Månsarp
    • Västerbotten
      • Norsjö
    		No reference listed
    USA
     
    • Arizona
      • Cochise Co.
    		Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 107.
      • Gila Co.
    		Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 90, 95, 107.
      • Pinal Co.
    		Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 107.
    • California
      • San Bernardino Co.
        • Mojave Desert
    • Colorado
      • Conejos Co.
    		Minerals of Colorado (1997) Eckels, E. B.
    Minerals of Colorado (1997) Eckels, E. B.
    Minerals of Colorado (1997) Eckels, E. B.
      • Rio Grande Co.
    		Minerals of Colorado (1997) Eckels, E. B.
    Minerals of Colorado (1997) E.B. Eckels
    • Indiana
      • Tippecanoe Co.
        • Lafayette
    		www-curator.jsc.nasa.gov/antmet/mmc/Lafay.pdf.
    • Maine
      • Aroostook Co.
    		King & Foord, 1994. Mineralogy of Maine, V.1.
      • Washington Co.
        • Perry
    		Morrill & Hinckley, 1959. Maine Mines & Mineral Localities, Vol. 2.
    • Massachusetts
      • Middlesex Co.
    		Emerson, B.K. Geology of Massachusetts and Rhode Island, 1917. (USGS Bulletin 597), p.206.
    • Michigan
    		www.deq.state.mi.us/documents/deq-glm-rcim-geology-Minerals_Found_In_Michigan.Pdf.
    • Minnesota
      • Lake Co.
        • Ely-Hoyt Lakes Area
    		U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    • New Mexico
      • Catron Co.
    		Minerals of New Mexico 3rd ed.
      • Colfax Co.
    		Minerals of New Mexico 3rd ed.
    Minerals of New Mexico 3rd ed.
    Northrop, Minerals of New Mexico, 3rd rev. ed., 1996
      • Luna Co.
    		Minerals of New Mexico 3rd ed.
    Minerals of New Mexico 3rd ed.
    Minerals of New Mexico 3rd ed.
      • Otero Co.
    		Minerals of New Mexico 3rd ed.
      • Rio Arriba Co.
    		Minerals of New Mexico 3rd ed.
      • Sandoval Co.
    		Minerals of New Mexico 3rd ed.
      • Santa Fe Co.
    		Minerals of New Mexico 3rd ed.
    Minerals of New Mexico 3rd ed.
    • Oregon
      • Jefferson Co.
    		USGS Bull 969
    • Utah
      • Tooele Co.
        • Oquirrh Mts
    		UGMS Bull 117 Minerals and Mineral Localities of Utah
    • Virginia
      • Amherst Co.
    		Minerals of Virginia, 1990 by R. V. Dietrich
    Minerals of Virginia, 1990 by R. V. Dietrich
      • Campbell Co.
    		Minerals of Virginia, 1990 by R. V. Dietrich
    Minerals of Virginia, 1990 by R. V. Dietrich
    • Wisconsin
      • Forest Co.
        • Little Sand Lake
    Mineral and/or Locality
    Google
     
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