Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (2 online) Mindat Auctions

Trona

Big Photo

Owens Lake, Owens Valley, Inyo Co., California, USA
© Th. Krassmann

Show Trona Photos (15)
Formula:
Na
 
3
H(CO
 
3
)
 
2
·2H
 
2
O
System:MonoclinicColour:Colourless, gray-white, ...
Hardness:2½
Name:Trona is a Swedish term, deriving ultimately from the Arabic "natrum", native salt.


Thermonatrite-Natron Group.

Classification of Trona

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:5/D.02-30
Nickel-Strunz 10th (pending) edition ID:5.CB.15

5 : CARBONATES (NITRATES)
C : Carbonates without additional anions, with H2O
B : With large cations (alkali and alkali-earth carbonates)
Dana 8th edition ID:13.1.4.1

13 : ACID CARBONATES
1 : Miscellaneous
Hey's CIM Ref.:11.1.6

11 : Carbonates
1 : Carbonates of the alkali metals and ammonium
mindat.org URL:http://www.mindat.org/min-4031.html
Please feel free to link to this page.

Occurrences of Trona

Geological Setting:Saline lakes and their evaporites; efflorecences on soils in arid regions.

Physical Properties of Trona

Lustre:Vitreous
Diaphaneity (Transparency):Translucent
Colour:Colourless, gray-white, light yellow; colourless in transmitted light.
Hardness (Mohs):2½
Cleavage:Perfect
On {100} perfect; on {111} and {001} in traces.
Fracture:Irregular/Uneven, Sub-Conchoidal
Density (measured):2.14 g/cm3

Crystallography of Trona

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Cell Parameters:a = 20.1Å, b = 3.49Å, c = 10.33Å
β = 103.05°
Ratio:a:b:c = 5.759 : 1 : 2.96
Unit Cell Volume:V 705.92 ų (Calculated from Unit Cell)
Morphology:Crystals elongated [010], also flattened {001}. {h0l} faces striated parallel to [010]. Fibrous or massive columnar common.
Crystal Atlas:
Image Loading
Click on an icon to view
Trona no.1 - Goldschmidt (1913-1926)
Trona no.9 - Goldschmidt (1913-1926)

About Crystal Atlas

You may need to scroll this box using your mouse to view the full instructions.

The mindat.org Crystal Atlas allows you to view a selection of crystal drawings of real and idealised crystal forms for this mineral and, in certain cases, 3d rotating crystal objects. You need Java to see these. You can download Java for free - click here to download Java

The 3d models and java code are kindly provided by www.smorf.nl. You can control the movement of the models by holding down the left mouse-button over the 3d model and moving your mouse. Keyboard controls are:

: default positions
t/T: decrease/increase transparency x/X: next/previous texture
b/B: next/previous background w: toggle wireframe
s: toggle sticks m: toggle miller indices
k: toggle crystallographic axes =/-: zoom in/out
r: stop/start rotation 1/2/3
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data: Peaks:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Trona

Type:Biaxial (-)
RI values: nα = 1.412 nβ = 1.492 nγ = 1.540
2V:Measured: 72° , Calculated: 70°
Maximum Birefringence:δ = 0.128

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

Chemical Properties of Trona

Formula:
Na
 
3
H(CO
 
3
)
 
2
·2H
 
2
O
Essential elements:C, H, Na, O
All elements listed in formula:C, H, Na, O

Relationship of Trona to other Species

Common Associates:
NatronThermonatriteHaliteGlauberiteThenardite
MirabiliteGypsum
Related Minerals - Nickel-Strunz Grouping):

- +
5.CB.05Thermonatrite
Na
 
2
CO
 
3
·H
 
2
O
5.CB.10Natron
Na
 
2
CO
 
3
·10H
 
2
O
5.CB.20Monohydrocalcite
CaCO
 
3
·H
 
2
O
5.CB.25Ikaite
CaCO
 
3
·6H
 
2
O
5.CB.30Pirssonite
Na
 
2
Ca(CO
 
3
)
 
2
·2H
 
2
O
5.CB.35Gaylussite
Na
 
2
Ca(CO
 
3
)
 
2
·5H
 
2
O
5.CB.40Chalconatronite
Na
 
2
Cu(CO
 
3
)
 
2
·3H
 
2
O
5.CB.45Baylissite
K
 
2
Mg(CO
 
3
)
 
2
·4H
 
2
O
5.CB.50Tuliokite
Na
 
6
BaTh(CO
 
3
)
 
6
·6H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
11.1.1Zabuyelite
Li
 
2
CO
 
3
11.1.2Natrite
Na
 
2
CO
 
3
11.1.3Nahcolite
NaHCO
 
3
11.1.4Wegscheiderite
Na
 
5
H
 
3
(CO
 
3
)
 
4
11.1.5Thermonatrite
Na
 
2
CO
 
3
·H
 
2
O
11.1.7Natron
Na
 
2
CO
 
3
·10H
 
2
O
11.1.8Kalicinite
KHCO
 
3
11.1.9Shortite
Na
 
2
Ca
 
2
(CO
 
3
)
 
3
11.1.10Nyerereite
Na
 
2
Ca(CO
 
3
)
 
2
11.1.11Natrofairchildite
11.1.12Zemkorite
Na
 
2
Ca(CO
 
3
)
 
2
11.1.13Pirssonite
Na
 
2
Ca(CO
 
3
)
 
2
·2H
 
2
O
11.1.14Gaylussite
Na
 
2
Ca(CO
 
3
)
 
2
·5H
 
2
O
11.1.15Baylissite
K
 
2
Mg(CO
 
3
)
 
2
·4H
 
2
O
11.1.16Fairchildite
K
 
2
Ca(CO
 
3
)
 
2
11.1.17Bütschliite
K
 
2
Ca(CO
 
3
)
 
2
11.1.18Teschemacherite
(NH
 
4
)HCO
 
3

Other Names for Trona

Synonyms:
Tronite
Other Languages:
Catalan:Trona
French:Urao
German:Trona
Ägyptisches Natrium
Natrum von Tripole
Stralige Natrum
Tronit
Italian:Trona
Latin:Alkali orientale impurum terrestre
Russian:Трона
Spanish:Tronita

Other Information

Other Information:Soluble in water. Effervesces in acids.
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 Trona

Reference List:Wallerius, J.G (1747) Mineralogia, eller Mineralriket. Stockholm: 174 (as Alkali orientale impurum terrestre).

Bagge (1773) Svenska Vetenskapsakademien, Stockholm, Handlingar: 35: 140.

Klaproth, M.H. (1802) Beiträge zur chemischen Kenntniss der Mineralkörpers. vol. 3: 83 (as Stralige Natrum).

Boussingault (1826) Annales des mines: 12: 278 (as Urao).

Zepharovich (1887) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 13: 135.

Ayres (1889) American Journal of Science: 38: 65.

Chatard (1889) American Journal of Science: 38: 59.

Chatard (1890) USGS Bulletin 60: 27.

Doelter, C. (1911) Handbuch der Mineral-chemie (in 4 volumes divided into parts): 1: 186.

Hintze, Carl (1916) Handbuch der Mineralogie. Berlin and Leipzig. 6 volumes: 1(3A): 2759, 2770.

Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 146.

Walther (1922) American Mineralogist: 7: 86.

Goldschmidt, V. (1923) Atlas der Krystallformen. 9 volumes, atlas, and text: vol. 9 (1923). Heidelberg: 11.

Piazza (1931) Periodico de Mineralogia-Roma: 2: 17.

Larsen, E.S. and Berman, H. (1934) The Microscopic Determination of the Nonopaque Minerals, Second edition, USGS Bulletin 848.

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: Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 138-140.

Murdoch, Joseph (1951), Notes on California minerals: nuevite = samarskite; trona, and hanksite; Gaylussite: American Mineralogist: 36: 358-361.

Pabst, Adolf (1959), On the hydrates of sodium carbonate, a correction, and the crystallography of trona. American Mineralogist: 44: 274-281.

Acta Crystallographica (1982): B38: 2874-2876.

Internet Links for Trona

Search Engines:
  • Look for Trona on Google
  • Look for Trona images on Google
    • External Links:
  • Look for Trona on Webmineral
  • Look for Trona on Athena Mineralogy
  • Look for Trona on Wikipedia
  • Look for Trona on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Trona in the Natural History Museum (London) online catalogue
  • Trona details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Fine Minerals from Dan Weinrich Minerals
  • Search for - Trona - on e-Rocks Mineral Sales & Auctions
  • Edwards Minerals - Fine Specimens
  • Wilensky Fine Minerals
  • Wright's Rock Shop - excellent mineral specimens since 1970
  • Buy from David K Joyce minerals
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Lapis Mineral Magazin
  • Buy Minerals and Crystals from Crystalarium.com
  • Top quality minerals from Kristalle of California
  • Wendel Minerals - Auktion & Shop
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

    Sponsorship:This page is currently not sponsored. Click here to sponsor this page.

    Localities for Trona

    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.
    (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.
    Argentina
     
    • Salta
    Australia
     
    • Western Australia
      • Goldfields-Esperance region
        • Kalgoorlie-Boulder City
          • Goongarrie
    		Mineralogical Magazine 1977 41 : 37-41; Min Mag (1979) 43, 97-98
    Bolivia
     
    • Potosí Department
      • Nor Lípez Province
        • San Juan
    		Ahlfeld & Muñoz Reyes (1955) Las Especies Minerales de Bolivia (Banco Minero de Bolivia)
      • Sud Lípez Province
    		USGS Bulletin # 1975, (1992)
    USGS Bulletin # 1975, (1992)
    USGS Bulletin # 1975, (1992)
    Canada
     
    • Québec
      • Montérégie
        • Rouville RCM
          • Mont Saint-Hilaire
    		Horváth, L and Gault, R.A. (1990), The mineralogy of Mont Saint-Hilaire Quebec. Mineralogical Record: 21: 284-359.
    Chad
     
    • Lake Chad
      • Kanem (Khanem) Region
        • Eguéi (Eguei; Eguéï; Egai) Region
    		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: 955.
    Chile
     
    • Tarapacá Region
      • Iquique Province
        • Santa Rosa-Huantajaya District
    		Schlüter, J. and Pohl, D.- N. Jb. MH. 182/1. 2005, 11-14
    China
     
    • Henan Province
      • Nanyang Prefecture
        • Tongbai Co.
          • Biyang basin
    		http://findarticles.com/p/articles/mi_hb048/is_199809/ai_hibm1G153067227
    Zhen-Qi Zhou, Qing-Shui Dong, Gang-Fu Hou, Sheng-Chuan Xu, and Chang-Sheng Miao (2006): Journal of Jilin University (Earth Science Edition) 36(6), 1001-1005.
    • Inner Mongolia Autonomous Region
      • Xilin Gol (Xilinguole) League
        • Sonid Right Banner
    		Yu, G., Harrison, S.P., and Xue, B. (2001): Lake status records from China: Data Base Documentation. MPI-BGC Technology Report No. 4, pp. 46-49.
    • Qinghai (Chinghai) Province
      • Haixi Autonomous Prefecture
        • Dulan Co.
    		Kamitani, M., Okumura, K., Teraoka, Y., Miyano, S., and Watanabe, Y. (2007): Mineral Resources Map of East Asia. Geological Survey of Japan.
    • Tibet Autonomous Region
      • Nagchu (Naqu) Prefecture
        • Xainza (Shenzha) Co.
    		Yuan, H.R., Zheng, M.P., and Si, D.X. (2005): Abstracts of the IX. International Conference on Salt Lake Research, September 26-30, Perth, Australia.
    Egypt
     
    • Al Jizah (Giza) Governorate
      • Al Jizah (Giza)
    		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: 139.
    • Western Desert
    		Collection Elmar Lackner
    Greenland
     
    • Kitaa (West Greenland) Province
      • Narsaq
        • Ilimaussaq complex
    		Petersen, O., Giester, G., Brandstätter, F., Niedermayr, G. (2002): Nabesite, a new mineral species from the Ilimaussaq alkaline complex, Canadian Mineralogist, Vol. 40, 173-181
            • Kvanefjeld Uranium deposit
    		- Petersen, O., Khomyakov, A., Soerensen, H. (2001): Natrophosphate from the Ilimaussaq alkaline complex South Greenland, South Greenland, Geology of Greenland Survey Bulletin, 190, 139-141
    Hungary
     
    • Bács-Kiskun Co.
      • Great Hungarian Plain
    		Szakáll-Gatter-Szendrei: Mineral Species of Hungary, 2006
        • Petőfiszállás
    		Szakáll-Gatter-Szendrei: Mineral Species of Hungary, 2006
    Italy
     
    • Campania
      • Naples Province
        • Somma-Vesuvius Complex
    		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: 139; Russo, M., 2006: I minerali di formazione fumarolica della grande eruzione vesuviana del 1906
      • Phlegrean Volcanic Complex
        • Naples Province
          • Phlegrean Fields
            • Pozzuoli
    		Sinno R. – (1957) Trona, thenardite e mirabilite nei Campi Flegrei. Periodico di Mineralogia – Roma pp. 1-12.
    • Sicily
      • Catania Province
        • Etna Volcanic Complex
          • Mt Etna
    		www.cse.speleo.it
    Kenya
     
    • Rift Valley Province
      • Gregory Rift
    		G. Périnet, J.J. Tiercelin, C.E. Barton : "Présence de kanémite dans les sédiments récents du lac Bogoria, Rift Gregory, Kenya", Bull. Minéral., 1982, 105, 633-639.
      • South Rift Valley
    		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: 139.
      • Suswa Volcano
    		Forti, P. et al. (2004), "Minerogenesis of volcanic caves of Kenya". Int. J. Speleol. 32, 3-18
    Libya
     
    • Fezzan
    		Piazza M. (1931): Trona del Lago Mandara (Fezzan). Periodico di Mineralogia - Roma, pp. 17-23.
    Namibia
     
    Foshag, Wm. F. (1933) Sulfohalite and Other Minerals from the Otjiwalundo Salt Pan, South West Africa. American Mineralogist: 18: 431-434; 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: 549.
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Khibiny Massif
            • Kukisvumchorr Mt
    		Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
          • Lovozero Massif
    		Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
              • Umbozero Mine
    		Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    South Africa
     
    • Gauteng Province
      • Pretoria
    		Minerals of South Africa
    Switzerland
     
    • Vaud (Waadt)
      • Bex
    		Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): \"Mineralienlexikon der Schweiz\", Wepf (Basel), p. 413.
    • Wallis (Valais)
      • Martigny
        • Mont Chemin
    Tanzania
     
    • Arusha Region
    		www.koeln.netsurf.de/~w.steffens/other.htm
    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: 139.
    Turkey
     
    • Marmara Region
      • Balikesir Province
        • Biga peninsula
    UK
     
    • England
      • Co. Durham
        • Billingham
    		Mineralogical Magazine 1959 32 : 172-175.
      • Devon
        • East Devon
    		Brian Craik-Smith collection
    USA
     
    • California
      • Inyo Co.
        • Owens Valley
    		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: 139.; Mineralogical Record (2001) 32: 245; Clarke, F.W. (1910), Analyses of rocks and minerals from the laboratory of the United States Geological Survey, 1880-1908; USGS Bulletin 419: 256; Chatard, T.M. (1890a), On urao: American Journal of Science, 3rd. series: 38: 59; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 374; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 205.
      • Lake Co.
        • Clear Lake Oaks
          • Clear Lake
    		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: 139, 235, 373.
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
      • Mono Co.
        • Mono Lake
    		Murdoch, Joseph (1951c), Notes on California minerals: nuevite = samarskite; trona, and hanksite; Gaylussite: American Mineralogist: 36: 358; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 374; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 207, 283.
      • San Bernardino Co.
        • Fort Irwin Area
    		U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    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: 139, 340, 629; Mineralogical Record (2007): 38: 212.
    • Colorado
      • Alamosa Co.
    		U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
      • Chaffee Co.
        • Chalk Creek District
    		Minerals of Colorado (1997) Eckel, E. B.
      • Costilla Co.
        • San Luis Valley
    		Minerals of Colorado (1997) E.B. Eckels
      • Mesa Co.
    		Minerals of Colorado (1997) Eckels, E. B.
      • Rio Blanco Co.
        • Piceance Basin
          • Green River Formation
    		Minerals of Colorado (1997) E.B. Eckels
      • Saguache Co.
    		U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    • Michigan
      • Marquette Co.
        • Marquette iron range
          • Palmer
    		Mineralogy of Michigan (2004) Heinrich & Robinson
    • Nevada
      • Churchill Co.
        • Ragtown
          • Carson Sink
    		USBM Inf Circ 7093 (1939)
    USBM Inf Circ 7093 (1939)
      • Mineral Co.
    		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: 139; NBMG Spec Pub 31 Minerals of Nevada.
    NBMG Bull 58 Geology and Mineral Resources of Mineral County, Nevada
    NBMG Spec Pub 31 Minerals of Nevada
      • Nye Co.
    		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: 139; NBMG Spec Pub 31 Minerals of Nevada.
    • New Mexico
      • Cibola Co.
    		10th Annual New Mexico Mineral Symposium
      • Colfax Co.
        • Springer
          • Point of Rocks Mesa (Pecks Mesa)
    		Northrop, Minerals of New Mexico, 3rd. rev. ed. (1996)
      • McKinley Co.
        • Valle de San Miguel
    		Minerals of New Mexico 3rd ed.
      • Otero Co.
    		2008 New Mexico Mineral Symposium abstracts
    • Utah
      • Duchesne Co.
    		UGMS Bull 117 Minerals and Mineral Localities of Utah
    http://gsa.confex.com/gsa/2002AM/finalprogram/abstract_45510.htm.
    Am Min 58:211-217
    • Washington
      • Grant Co.
        • Moses Lake
    		Cannon, B. (1975): Minerals of Washington, p.63
    www.dnr.wa.gov/geology/okanogan.htm.
    • Wyoming
      • Albany Co.
        • Laramie
    		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: 139.
    [Clark, 1993 - "Hey's Mineral Index"]
        • Green River Basin
    		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.
    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: 139, 279.
    Am Min 48:400-403
    Am Min 26:646-650
    Am Min 48:400-403
    Am Min 48:400-403
    Am Min 46:420-429
    Am Min 49:778-781
    Venezuela
     
    • Zulia
    		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: 139.
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    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: 29th Oct 2009 16:46:10