Mindat Logo
bannerbannerbannerbanner
Welcome!

Pseudomorphs & Replacements D to I

Posted by Rock Currier  
avatar Pseudomorphs & Replacements D to I
December 25, 2010 09:18PM
Click here to view Pseudomorphs & Replacements A & B. Click here to view Pseudomorphs & Replacements C. Click here to view Pseudomorphs & Replacements J to M. Click here for Pseudomorphs & Replacements N to P. Click here to view Pseudomorphs & Replacements Quartz. Click here to view Pseudomorphs & Replacements R to Z. Click here to view Best Minerals P, click here to view and here for Best Minerals A to Z and here for Fast Navigation of completed Best Minerals articles.


Can you help make this a better article? What good localities have we missed? Can you supply pictures of better specimens than those we show here? Can you give us more and better information about the specimens from these localities? Can you supply better geological or historical information on these localities?


Datolite & Quartz after Anhydrite
USA
New Jersey, Passaic Co., Haledon, Braen Quarry (Braen Stone Industry Quarry; Sam Braen Quarry)

Datolite after Anhydrite 8.1cm wide© Rob Lavinsky
Datolite after Anhydrite 5.4cm wide© Rob Lavinsky


Datolite & Quartz after Anhydrite ~14cm© EAS 2008
Datolite after Anhydrite ~14cm wide© EAS 2008


Datolite after Anhydrite 5.4cm wide© Rob Lavinsky


Many of these pseudomorphs may be somewhat complex. It may be that most of them were originally crystals of Anhydrite covered by a thin crusts or even partial crusts of quartz. Later the Anhydrite was dissolved and then Datolite and other minerals were deposited on the quartz at a later date. Often it may be that the amount of Datolite and other minerals are much greater than the amount of the quartz in the specimen.



Datolite after Anhydrite with Apophyllite/b]
USA
New Jersey, Somerset Co., Bernards Township, Millington Quarry (Morris County Crushed Stone Co. Quarry; Tilcon Quarry)

Back side of left© Rob Lavinsky


Danburite after Topaz with Topaz
Burma (Myanmar)
Mandalay Division, Sagaing District, Mogok




Descloizite after Vanadinite with Calcite
Mexico
Chihuahua, Mun. de Coyame, Cuchillo Parado, Aurora Mine




Descloizite after Vanadinite
Portugal
Beja District, Moura, Sobral da Adiça




Descloizite after Vanadinite
Namibia
Otjozondjupa Region, Grootfontein District, Grootfontein, Abenab Mine

Descloizite after Vanadinite ~5.5cm tall©




These are old time specimens and I don't think any of them have been produced during the last 75 years or so. They used to be fairly abundant and you can often see them in old institutional collections. All that I have seen have sustained some damage and most of them still have altered at least on the surface to Descloizite and all have cores of red Vanadinite. I have seen some crystals of at least four inches, and if these had been encountered and carefully collected in an unaltered state they would have produced undoubtedly the worlds finest Vanadinite specimens.
[Rock Currier 2011]


Descloizite after Wulfenite
USA
Arizona, Pinal Co., Mammoth District, Tiger, St. Anthony deposit, Mammoth-Saint Anthony Mine (Mammoth-St Anthony Mine; Mammoth Mine; St. Anthony Mine)




Digenite after Chalcocite
UK
Cornwall, St Just District, Cornwall, St Just, Botallack, Botallack Mine




Dioptase after Calcite
Democratic Republic of Congo (Zaïre)
Katanga (Shaba), Katanga Copper Crescent, Central area, Shinkolobwe, Tantara Mine

Dioptase after Calcite 6.5cm wide©


Dolomite after Aragonite
Italy
Tuscany, Grosseto Province, Gavorrano, Gavorrano Mine



Dolomite after Aragonite
Namibia
Otjikoto (Oshikoto) Region, Tsumeb, Tsumeb Mine (Tsumcorp Mine)




Dolomite after Aragonite
USA
New Mexico, Eddy Co.



Every area of the world where collectors exist in large numbers, there are local localities like these that produce specimens that are not very notable, but never the less cherished and collected by local collectors. Even though they may be locally abundant, they do not achieve wide distribution in the collector community because of their unremarkable character and it will pay no one enough to go to the trouble of collecting them and selling them. These may be prime examples of such specimens but in truth I have no idea of how abundant these specimens are and I hope someone who has collected them may read this and volunteer specific information about this locality and its specimens.
[Rock Currier 2011]


Dolomite after Aragonite
USA
New Mexico, Guadalupe Co.




Dolomite after Aragonite
USA
Wyoming, Big Horn Co., Lovell

Dolomite after Aragonite 5cm wide


Dolomite after Calcite
Belgium
Namur Province, Namur, Beez




Dolomite after Calcite
Bulgaria
Plovdiv Oblast, Rhodope Mts, Laki (Luki), Djurkovo Complex, Droujba (Drujba) Mine




Dolomite after Calcite
Bulgaria
Plovdiv Oblast, Rhodope Mts, Laki (Luki), Govedarnika Mine




Dolomite after Calcite
Germany
North Rhine-Westphalia, Sauerland, Lennestadt, Grevenbrück quarry

Dolomite after Calcite 5.5cm wide© G. van der Veldt


Dolomite @ Calcite 11cm wide© G. van der Veldt
Dolomite after Calcite 9cm wide© G. van der Veldt


Dolomite after Calcite
Germany
Saxony, Erzgebirge, Schlema-Hartenstein District, Shaft 371

Dolomite @ Calcite 6cm tall© Weinrich Minerals, Inc.



Dolomite after Calcite & Calcite
Mexico
Guanajuato




Dolomite after Calcite
Namibia
Otjikoto (Oshikoto) Region, Tsumeb, Tsumeb Mine (Tsumcorp Mine)

Dolomite after Calcite 2.8cm wide© Rob Lavinsky


Back side of left© Crystal Classics





Dolomite after Calcite & Calcite
Poland
Lower Silesia (Dolnoslaskie), Rudawy Janowickie Mts, Czarnów, Redziny, Dolomite quarry

Dolomite after Calcite 12cm wide© E. Szełęg


Dolomite after Calcite
Romania
Maramures Co., Cavnic (Kapnic; Kapnik)

Dolomite after Calcite 13cm wide© G. van der Veldt


Dolomite after Calcite
Romania
Maramures Co., Cavnic (Kapnic; Kapnik), Cavnic Mine (Kapnikbánya)

Dolomite @ Calcite 8cm wide© 2001 John H. Betts



Dolomite after Halite
USA
Oklahoma, Major Co., Fairfiew




Dolomite after Magnesite
Italy
Piedmont, Torino Province, Canavese District, Chiusella Valley, Traversella, Traversella Mine

Dolomite @ Magnesite FOV 6cm© GMV - Traversella



Dolomite after Quartz
Romania
Maramures Co., Cavnic (Kapnic; Kapnik), Cavnic Mine (Kapnikbánya)

Dolomite after Quartz 9.8cm© Tamás Ungvári 2005



Dolomite after Siderite
Romania
Maramures Co., Cavnic (Kapnic; Kapnik)




Dolomite after Siderite
Romania
Maramures Co., Baia Mare (Nagybánya), Chiuzbaia (Kisbánya), Herja Mine




Dolomite after Stibnite
Romania
Maramures Co., Cavnic (Kapnic; Kapnik)




Duftite after Wulfenite
Namibia
Otjikoto (Oshikoto) Region, Tsumeb




Duftite after Wulfenite
Namibia
Otjikoto (Oshikoto) Region, Tsumeb

Duftite @ Wulfenite 2.5cm center© Jasun McAvoy


Dyscrasite after Silver
Czech Republic
Bohemia (Böhmen; Boehmen), Central Bohemia Region, Príbram



One wonders if this specimen is described accurately. It would appear that the shape of the crystal is all wrong for a silver crystal.


Elpadite, Aegirine etc. after Eudaylite
Greenland
Kitaa (West Greenland) Province, Narsaq, Igaliku (Igaliko), Narssârssuk (Narsarsuk), Narssârssuk pegmatite (Narsarsuk pegmatite)

Elpadite @ Eudaylite xls to 1.5cm© C.H.M.-Schäfer


Elpadite after Serandite; Serandite (bottom)
Canada
Québec, Montérégie, Rouville RCM, Mont Saint-Hilaire, Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry)




Ernstite after Eosphorite
Brazil
Minas Gerais, Doce valley, Divino das Laranjeiras




Epsomite after Glauberite
Australia
South Australia, Mt Lofty Ranges, North Mt Lofty Ranges, Lochiel, Lake Bumbunga

Epsomite after Glauberite 5.5 cm wide© Nunes


Eriochalcite after Bandylite
Chile
Antofagasta Region, El Loa Province, Calama, Chuquicamata District, Toki Cu deposit, Queténa Mine

Eriochalcite @ Bandylite close up© Lavinsky

The few good specimens of Bandylite I have seen look like little green playing cards on matrix and here you can see the some rather rough little green "playing cards". Bandylite is not very stable and probably most specimens of Bandylite have been altered to Eriochalcite.


Ettringite after calcite?
South Africa
Northern Cape Province, Kalahari manganese fields, Kuruman, N'Chwaning Mines




Euclase after Beryl
Zimbabwe
Mashonaland West, Karoi (Urungwe; Hurungwe) District

Euclase after Beryl 8cm tall© Russell G. Rizzo


There are much better examples of this type of pseudomorph and when pictures become available we will place them here.


Fahlunite after Cordierite
USA
Connecticut, Middlesex Co., Haddam, Timms Hill (Tim's Hill)




Feldspar after Lepidolite
Brazil
Minas Gerais, Jequitinhonha valley, Capelinha



It is debatable that the feldspar is really replacing the lepidolite in this specimen, but saying so might help sell the specimen. Also its a pretty specimen and lord knows most of the pseudomorphs pictured here can use all the help they can get.


feldspar after Leucite
Czech Republic
Bohemia (Böhmen; Boehmen), Karlovy Vary Region, Krušné Hory Mts (Erzgebirge), Ostrov, Loucná

feldspar after Leucite 4.3cm© J. Witkowski


Feldspar after Tourmaline
USA
California, San Diego Co., Mesa Grande District, Gem Hill, Himalaya Mine (Himalaya dikes; Himalaya pegmatite)




Ferberite after Scheelite
France
Limousin, Haute-Vienne, Saint-Léonard-de-Noblat, Puy-les-Vignes

Ferberite after Scheelite 7cm wide© Alain TUEL


Ferberite after Scheelite
Japan
Honshu Island, Chubu region, Yamanashi prefecture, Kinpuzan district, Kofu City, Otome mine (Mitake mine)




Fluorapatite after Pyromorphite
Germany
Saxony, Erzgebirge, Freiberg District, Halsbrücke, Lorenz Gegentrum Mine




Fluorite after Calcite
Mexico
Chihuahua, Mun. de Aquiles Serdán, Santa Eulalia District

Fluorite after Calcite 9.3cm wide© Lavinsky


Fluorite after crinoid stem
UK
England, Derbyshire, Ashover, Milltown, Milltown Quarry




Fluorite after mica
Namibia
Erongo Region, Usakos and Omaruru Districts, Erongo Mountain

Fluorite after mica, 4.5cm tall© Rob Lavinsky

Fluorite after mica© Rob Lavinsky
Fluorite after mica© Rob Lavinsky


Fluorite after Wood
Germany
Saxony, Chemnitz, Hilbersdorf




Galena after Cerussite
Germany
North Rhine-Westphalia, Niederberg area, Wülfrath, Rohdenhaus, Rohdenhaus Quarry (incl. Krieger Quarry)




Galena after Pillaite?
Italy
Tuscany, Lucca Province, Apuan Alps, Stazzema, Ponte Stazzemese, Buca della Vena Mine




Galena after Pyromorphite
France
Brittany, Finistère, Huelgoat




Galena after Pyromorphite
France
Brittany, Finistère, Poullaouen




Galena after Pyromorphite
Germany
Rhineland-Palatinate, Hunsrück Mts, Bernkastel-Kues

Galena after Pyromorphite ~3.5cm tall©

Galena after Pyromorphite ~6.5c wide©

These pseudomorphs of Galena after Pyromorphite are not always complete replacements but never the less these are amongst the most sought after pseudomorphs by collectors, and can bring thousands of dollars each. Some of the ones pictured here and below are amongst the best examples of these pseudomorphs.


Galena after Pyromorphite
Germany
Rhineland-Palatinate, Hunsrück Mts, Bernkastel-Kues, Kautenbach Mine

Galena @ Pyromorphite 4cm wide© G. van der Veldt
.
Galena @ Pyromorphite 2.6cm wide© Rob Lavinsky





Galena after Pyromorphite
UK
England, Cornwall, St Agnes District, Perranzabuloe, Hendra Croft, Wheal Hope (incl. South Wheal Budnick; West Wheal Hope)

Galena after Pyromorphite 10.5cm wide© Rob Lavinsky
.
Galena after Pyromorphite 2.7cm© Paul De Bondt


Garnet after Orthoclase & Epidote
China
Hebei Province, Handan Prefecture

Another view of left© Jiangbin


Gasparite-(Ce) after Synchysite
Italy
Piedmont, Verbano-Cusio-Ossola Province, Ossola Valley, Baceno, Mount Cervandone, Devero Alp (Devero Valley; Val Devero)

1.8mm Gasparite-(Ce) @ Synchysite© Bonacina


Gmelinite after Chabazite
Canada
Nova Scotia, Cumberland Co., Bay of Fundy, Five Islands

Gmelinite @ Chabazite 4.1cm tall© Rob Lavinsky


Gmelinite after Chabazite 7.3cm wide© Weinrich


Gobbinsite after garronit??
Canada
Québec, Montérégie, Rouville RCM, Mont Saint-Hilaire, Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry)






The Goethite pseudomorphs shown below in many cases would probably be more accurately labeled limonite after xxxxx. Almost certainly the majority of the specimens shown below were never accurately characterized before posting. These together with those in the section containing the limonite pseudomorphs represent a very large group of pseudomorphs, and a large collection of the many different types could be made.

Goethite after Calcite
Germany
Sazony, Erzgebirge, Eibenstock




Goethite after Calcite
Namibia
Erongo Region, Usakos and Omaruru Districts, Erongo Mountain




Goethite after Cuprite
Germany
North Rhine-Westphalia, Bergisches Land, Rösrath, Hoffnungsthal, Leibnitz-Dante Mine




Goethite after Gypsum
Mexico
Chihuahua, La Negra, Mun. de Carmargo, Hercules Mine (Negra Mine)




Goethite after Gypsum
Mexico
Chihuahua, Mun. de Aquiles Serdán, Santa Eulalia District




Goethite after Gypusm? & Calcite
Morocco
Atlas Mts.




Goethite after Ilvaite
Russia
Far-Eastern Region, Primorskiy Kray, Dal'negorsk (Dalnegorsk; Tetyukhe; Tjetjuche; Tetjuche), Nikolaevskiy Mine

Goethite after Ilvaite 5.7cm tall© Shaw


Goethite after Kutnohorite?
South Africa
Northern Cape Province, Kalahari manganese fields, Kuruman, N'Chwaning Mines




Goethite after Marcasite
Hungary
Pest Co., Budai Mts., Budaörs, Frank Hill (Kakukk Hill)

Goethite after Marcasite 3.5cm wide© Szepi


Goethite after Marcasite
USA
Wisconsin, Columbia Co.




Goethite after Siderite
USA
Colorado, Park and Teller Cos., Crystal Peak area




Goethite after Pyrite
Austria
Tyrol, East Tyrol, Tauern valley, Matrei in Osttirol, Nussingkogel Mt.

Goethite after Pyrite 2.9cm© Christian Bracke



Goethite after Pyrite
Brazil
Minas Gerais, Jequitinhonha valley, Diamantina




Goethite after Pyrite
Italy
Tuscany, Massa-Carrara Province, Fivizzano, Sassalbo, Ospedalaccio Pass




Goethite after Pyrite
Mexico
Sonora, Mun. de Alamos, San Antonio

Goethite after Pyrite 11cm wide© 2003 John H. Betts



Goethite after Pyrite
UK
Wales, Cardiff (South Glamorgan; Glamorgan), Bwlch-y-cwm, Blaengwynlais Quarry




Goethite after Pyrite
USA
Colorado, Summit Co., Breckenridge District




Goethite after Pyrite
USA
Indiana, Orange Co., Paoli

Goethite after Pyrite to 1cm© 2006 Peter Cristofono



Goethite after Pyrite
USA
Wisconsin, Columbia Co.




Goethite after Pyrrhotite
Switzerland
Wallis (Valais), Lötschen valley, Blatten

1.2cm Goethite after Pyrrhotite© Bracke



Goethite after Quartz
USA
Colorado, Park Co., Lake George, Steven's Ranch, Yucca Hill, R. A. Kosnar claim




Goethite after Siderite
UK
England, Cornwall, St Just District, St Just, Kenidjack Valley, Wheal Drea




Goethite after Siderite
USA
Colorado, El Paso Co., Pikes Peak, Sentinel rock, Mona Mine




Goethite after Siderite & Quartz
USA
Colorado, Park Co., Lake George (Badger Flats) Area




Goethite after Siderite
USA
Washington, Okanogan Co., Golden Horn Batholith, Washington Pass




Goethite after Strengite
Germany
Baden-Württemberg, Black Forest, Wolfach, Oberwolfach, Rankach valley, Clara Mine




Goethite after ?
Namibia
Erongo Region




Grossular-Hibschite (akhtaragdite) after helvite?
Russia
Eastern-Siberian Region, Saha Republic (Sakha Republic; Yakutia), Vilyui River Basin (Vilui River Basin; Wilui River Basin), Akhtaragda River mouth (Achtaragda River mouth)




Grossular after Epidote
USA
Vermont, Lowell & Eden, Orleans & Lamoille Cos., Belvidere Mountain Quarries (Vermont Asbestos Group mine; VAG mine; Ruberoid Asbestos mine; Eden Mills quarries)

Grossular @ Epidote 4.3cm © Lavinsky


Grossular after ? 5cm tall© 2001 John H. Betts
Grossular after ? 6cm tall© 2001 John H. Betts





gummite after bröggerite
Russia
Northern Region, Karelia Republic, Northern Karelia, Chupa pegmatite field

gummite @ bröggerite FOV 1.5cm© Kartashov





gummite after Uraninite
Democratic Republic of Congo (Zaïre)
Katanga (Shaba), Katanga Copper Crescent, Central area, Shinkolobwe, Shinkolobwe Mine (Kasolo Mine)

close up of left© O'Neill


Gypsum after fossil
Australia
South Australia, Murray Basin, Morgan




Gypsum after Glauberite
USA
Arizona, Yavapai Co., Black Hills (Black Hill Range), Verde District, Jerome

Gypsum after Glauberite 5cm wide© Martins da Pedra


The Calcite pseudomorphs after Glauberite are much more common than the Gypsum pseudomorphs after Glauberite pictured above. But I don't think you could call them rare.


Gypsum after Halite
USA
California, Santa Barbara Co.

Gypsum @ Halite 4cm wide© Russell G. Rizzo
Gypsum @ Halite 3.9cm wide© Russell G. Rizzo


Gypsum after Halite
USA
Oklahoma, Greer Co.




Halite on bottle
Poland
Malopolskie, Bochnia, Bochnia Mine

Halite to 1cm on bottle© Elek Szełęg



Hausmnnite after Manganite
Germany
Thuringia, Harz Mts, Nordhausen, Ilfeld

© Weinrich
Hausmnnite after Manganite 4.4cm wide© Rob Lavinsky
Hausmnnite @ Manganite 3.9cm

Close up of left© Lavinsky


Hedenbergite after Ilvaite
Russia
Far-Eastern Region, Primorskiy Kray, Dal'negorsk (Dalnegorsk; Tetyukhe; Tjetjuche; Tetjuche)




Hematite after Actinolite
Germany
Saxony, Zwickau, Maxhütte




Hematite after Calcite
Germany
North Rhine-Westphalia, Sauerland, Iserlohn




Hematite after Calcite
Germany
Saxony, Erzgebirge, Schwarzenberg District, Langenberg, Graul




Hematite after Calcite
Germany
Thuringia, Thuringian Forest, Ilmenau




Hematite after Epidote
USA
Washington, King Co., North Bend, Green Mountain, Bessemer Ridge




Hematite after Magnetite
Argentina
La Rioja, Milagros




Hematite after Magnetite
Argentina
Mendoza, Altiplano de Payún Matru, Payún volcano

Hematite after Magnetite 7.9cm tall© Rob Lavinsky


Hematite @ Magnetite 4cm wide© 2002 John H. Betts
Hematite @ Magnetite 10.3cm© Fabre




These showed up on the market about ten years ago and were greatly appreciated by mineral collectors. Some of the better larger specimens sold for several thousand dollars. Some of the better big specimens measured as much as 20 or more cm in diameter.


Hematite after Magnetite
Norway
Akershus, Nittedal, Bjønndalen quarry




Hematite after Magnetite
USA
Utah, Beaver Co., Beaver Lake Mts, Beaver Lake District, Black Rock Mine




Hematite after Magnetite
USA
Utah, Iron Co., Iron Springs District (Iron and Granite Mountains & Three Peaks)

Hematite after Magnetite 7cm wide© Dalrymple





Hematite after Magnetite
USA
Utah, Millard Co., Twin Peak, Twin Peaks Prospect (Black Crystal; Black Diamond)

Hematite @ Magnetite 4.9cm wide© Hardinger



Hematite after Marcasite
Egypt
Matruh Governorate, Farafra Oasis

Hematite after Marcasite 5.1cm tall© Bracke


Hematite @ Marcasite 5cm wide© Bracke


Hematite @ Marcasite 2.2cm tall© Luca Toffolo


Hematite @ Marcasite 7.2cm © Rob Lavinsky

These specimens are mostly picked up on the surface of the desert with very little digging needed. The are apparently abundant and even the best of them sold for modest prices. Everyone could afford one of these.


Hematite after Pyrite
Argentina
San Luis, Inti Huasi, San Juan Mine

Hematite after Pyrite 3cm wide© Marcelo O. Olsina



Hematite after fossil shell
Egypt
Matruh Governorate, Farafra Oasis




Hematite after Siderite
USA
Colorado, Teller Co., Crystal Peak area

Hematite after Siderite 6.3cm © 2008 Michael C. Roarke


Hematite after Siderite
USA
Colorado, El Paso Co., Cheyenne District (St. Peters Dome District), St Peters Dome, Eureka Tunnel (1-15 pegmatite)




Hematite? after Siderite
USA
Colorado, Park Co., Lake George, Steven's Ranch, Yucca Hill, R. A. Kosnar claim

Hematite? @ Siderite 4.8cm wide© Rob Lavinsky


Hemimorphite after Calcite
USA
Wisconsin, Iowa Co., Upper Mississippi Valley District, Mineral Point




Hemimorphite after Dolomite
USA
Missouri, Newton Co., Tri-State District, Granby Field




Heterosite after Triphylite
USA
New Hampshire, Grafton Co., Groton, Palermo No. 1 Mine (Palermo #1 pegmatite)

Heterosite @ Triphylite 1.5cm© 2001 John H. Betts



Hingganite-(Yb) after ?
Norway
Telemark, Kragerø, Tangen Feldspar Quarry




Hinsdalite after Pyromorphite
Australia
Tasmania, Zeehan district, Zeehan, Zeehan Queen mine ("Sylvester-Queen") Pyromorphite lode

Hinsdalite@Pyromorphte 2.6cm© JSS





Hinsdalite after Pyromorphite
France
Brittany, Finistère, Huelgoat, Poullaba vein




Honessite after Millerite
USA
Kentucky, Lincoln Co., Halls Gap

Honessite after Millerite 6.2cm wide© Rob Lavinsky


Huntite after Hydromagnesite
Czech Republic
Moravia (Mähren; Maehren), South Moravia Region, Hrubšice, Oslavany, U Pustého Mlýna Quarry

Huntite after Hydromagnesite© Jakub Jirásek


Hydrocerussite afer Anglesite
Namibia
Otjikoto (Oshikoto) Region, Tsumeb, Tsumeb Mine (Tsumcorp Mine)




Hydrocerussite after Cerussite
Namibia
Otjikoto (Oshikoto) Region, Tsumeb

A 6mm Hydrocerussite @ Cerussite© 2008, JGW

The alteration of the specimen on the left is only skin deep.


Hydrotalcite after Spinel
USA
New York, Orange Co., Town of Warwick, Amity




Hydroxylapatite after Gypsum
Mexico
Durango, Mun. de Mapimí, Mapimí, Asterillo Mine

Close up of left© Weinrich


Ice after water
Canada
Ontario, Welland Co., Niagara Falls



Strictly speaking ice after water is not a pseudomorph, because water is not considered to be a mineral, but I thought it might be fun to include them here to start people thinking.


Ice after Water
Sweden
Uppland, Uppsala

Ice after Water ~2cm©


Ice after water ~2cm© Johan Kjellman


Imogolite after pumice
Japan
Honshu Island, Kanto Region, Tochigi Prefecture, Fukaiwa, Kanuma




Iriginite after Umohoite & Calcurmolite
Kazakhstan
Almaty Province (Almaty Oblysy; Almati Oblast'), Chu-Ili Mts, Kyzylsai Mo-U deposit

Iringite @ Umohoite 4cm wide© Pavel M. Kartashov
Close up of left© Pavel M. Kartashov


Iriginite @ Umohoite 4.5cm© Pavel M. Kartashov









Click here to view Pseudomorphs & Replacements A & B. Click here to view Pseudomorphs & Replacements C. Click here to view Pseudomorphs & Replacements J to M. Click here for Pseudomorphs & Replacements N to P. Click here to view Pseudomorphs & Replacements Quartz. Click here to view Pseudomorphs & Replacements R to Z. Click here to view Best Minerals P, click here to view and here for Best Minerals A to Z and here for Fast Navigation of completed Best Minerals articles.

Rock Currier
Crystals not pistols.



Edited 38 time(s). Last edit at 04/20/2013 09:52AM by Rock Currier.
avatar Re: Pseudomorphs D to I
December 25, 2010 11:00PM
    
Hi Rock,

Very nice work on the article, however I have a small point of consideration on the Hinsdalite after Pyromorphite
from the (Sylverster, Zeehan Queen mine) mine, Zeehan Tasmania. Hinsdaleite was the historical name given to the pseudomorph mineral after pyromorphite from this mine and so has been the name provided to all white to yellow changed pyromorphite.

After I had posted a photo of Hinsdalite after Pyromorphite on my list, Uwe Kolitsch asked if we could discount plumbogummite. After a bit of discussion between Myself, Uwe and Ralph Bottrill over the validity of the Hinsdaleite and if it was actually plumbogummite.

As a result of the discussion, I provided some small samples for testing. The results showed that the hinsdalite from Zeehan "shows no sulphur, so is probably plumbogumite (both white and green)". We need to ask Ralph to provide more information on the test processes and results. However it is likely that a broader range of specimens require testing to be totally certain but it appears that the Hinsdaleite is actually plumbogummite from this mine at Zeehan.

cheers

Andrew Tuma
avatar Re: Pseudomorphs D to I
December 25, 2010 11:05PM
Andrew,
Thanks for the update. It will be incorporated into the article when it gets a bit further along. I hope others will also chip in with corrections and advice for making the article better. Right now there is still a lot of work to be done just to get the images showing properly in the articles and the sizes adjusted to make them look pretty. After that we will start to do the corrections and add the descriptive text. I hope that others beside your self will help with this. It is a daunting to contemplate trying to do it all myself.

Rock Currier
Crystals not pistols.
avatar Re: Pseudomorphs D to I
December 25, 2010 11:28PM
    
Ta Rock, Not a problem, the article looks like it will be an excellent reference to pseudomorphed mineral.

Andrew
avatar Re: Pseudomorphs D to I
December 26, 2010 05:43AM
We do really need to analyse a few more specimens and quantify the phosphorus and sulphur contents before we change all the labels (though I can find no published support for any sulphur present in them either, it seems to have been a guess).
Its looking a great introduction to pseudomorphs Rock!

Regards,
Ralph



Edited 1 time(s). Last edit at 12/26/2010 05:52AM by Ralph Bottrill.
avatar Re: Pseudomorphs D to I
December 26, 2010 08:39AM
There are sure a lot of question marks when it comes to pseudomorphs. I have even included one unknown after an unknown to illustrate the problem.

Rock Currier
Crystals not pistols.
avatar Re: Pseudomorphs D to I
December 26, 2010 11:04PM
    
Hi Rock and all,

What a huge task !!!!!!!!
How did you get it in your head to start this ????
Congrats man, it's a real delight.smileys with beer
I would like to thank you for selecting some of my specimens.
There is just a problem with the hematite after ? from Ste Marie.
Sorry to say but that's no pseudomorph. These are all hexagonal iron roses setting together. You can see it good in the big one at the lower right.
The Ste Marie hematite is something special.
The mineral is found in several paralel veins running up through the Brézouard granite.
The special thing is that every vein has his own crystal form. So I suppose that these veins where formed the one after the other otherwise all the structures would be the same, I guess.
The selected pic is the rarest form and is quite scarce in the district. It is locally known as " la mamelonnée ".
To my knowledge and from rumors in the area, there could be around 15 different forms.
In my collection, I have " only " 8 of them.
The Brézouard used to be a very prolific hematite occurence but with the local law, prohibiting collecting, who knows how many other forms could be hiding under the ground. We will probably never know.

I hope this helps. Keep the good work up !

Take care and best regards.

Paul.
avatar Re: Pseudomorphs D to I
December 27, 2010 12:29AM
    
Very interesting article. Thanks for all you do. Noted one small problem, both New Mexico dolomite after aragonite point to the same specimen.

Denny
avatar Re: Pseudomorphs D to I
December 27, 2010 01:33AM
Paul,
Thanks for the heads up about the Ste Marie hematites. I think I will take your comments and probably the image as well and transfer them to the Hematite article. You have only eight examples of the particularly rare form? I didn't think anyone was as big a pig as I was. I am not certain how it got into my head to do an article on pseudomorphs except that I suddenly realized that there had never been anything really comprehensive that had been written about them and that with the tremendous resource of the mindat image gallery, that for the first time it might be possible to do something like this. I knew it was going to be a big job, but I thought, well, I did the one one Quartz USA, or at least the framework, what could be bigger than that. Of course when I got into the Pseudomorph article a little ways, I realized that it was likely to be larger than quartz USA. Well, If I am sucessfull in creating a framework for them, then over time others can come along like you and Dennis with corrections and comments and descriptions for the many pseudos and their localities that I know little or nothing about and help make the project a success.

Dennis,
Ill find out what is going on with the New Mexico dolomite and get it fixed. Right now the article isn't an article, but just a selection of images that I must now slowly and painfully beat into shape and add the captions and make look as pretty as I can. The problem is of course basically that Pseudomorphs are not very pretty and it takes a mother to love them. After this is done, then we can start adding the text and comments about them, but I am not sure that I will get around to adding text and comments before Tucson.

Rock Currier
Crystals not pistols.
avatar Re: Pseudomorphs D to I
December 27, 2010 02:17AM
Rock, I suspect the German hinsdalite should link to: [www.mindat.org] ?
The existing link goes to pseudomalachite (hard to tell if that one is a pseudomorph or not?)

Some possible additions: gibbsite after crocoite [www.mindat.org]
and gibbsite after dundasite: [www.mindat.org]

A fascinating collection that will keep us thinking for ages!

Regards,
Ralph



Edited 1 time(s). Last edit at 12/27/2010 02:33AM by Ralph Bottrill.
avatar Re: Pseudomorphs D to I
December 27, 2010 08:24AM
    
Hi Ralph,

The specimen of Gibbsite you have shown of mine I dont think is a Psudo. The Gibbsite appears to be coating the crocoite crystals not replacing them. The crocoite crystals that have fallen out are in a very good condition.

Andrew t
avatar Re: Pseudomorphs D to I
December 27, 2010 10:05AM
    
Hi Rock,

Thank you for the reply.
No, I have 8 of the 15 known forms. A few others can be seen in my gallery.
I still have to photograph quite a few different forms.
I will post the comment and links to the Best of gallery Hematite-from Argentina to Morocco.
In this gallery, a specimen is also labeled hematite after pyrite ? from the Brézouard.
This is no pseudo either. De crystal form is hexagonal and is just another type of another vein. This type is locally known as " la carrée ".

Thanks again.
Take care and best regards.

Paul.
avatar Re: Pseudomorphs D to I
December 27, 2010 07:40PM
Paul,
Yes, please make all the comments and corrections that you would like. For comments other than outright mistakes or errors, write them up just like you would if you were writing the article. In these cases, I will just take your text and drop it in under the images for a particular locality and put your name at the bottom of the text with the year you submitted it. Would you like to take a crack at writing a Best Minerals article about a particular mineral?

Rock Currier
Crystals not pistols.
avatar Re: Pseudomorphs D to I
December 29, 2010 01:26PM
Andrew, OK I will have to look for a better example of that replacement, this one appears to be gibbsite after dundasite on crocoite; but sometimes there is very little crocoite left. Steve had a crocoite after cerussite too.

Regards,
Ralph
Re: Pseudomorphs D to I
December 29, 2010 05:45PM
    
A rare example of Hemimorphite after Calcite from Leadhills, Scotland. [www.mindat.org].

Steve Rust
avatar Re: Pseudomorphs D to I
December 29, 2010 11:54PM
Steve, Thanks for bringing the specimen to my attention. How to they know it used to be calcite?

Rock Currier
Crystals not pistols.
Re: Pseudomorphs D to I
December 30, 2010 07:17PM
    
Well these specimens have all ways been assumed to be after calcite, for at lest 100 years., if this is actually correct is a another matter.

Steve Rust
avatar Re: Pseudomorphs D to I
December 30, 2010 09:28PM
Steve,
I know what you mean and there must be many similar examples in the various pseudomorphs I have put in the Best Mineral gallery. However I can't resist asking people such questions in case they may know the facts behind calling them such and such after what ever they were. In most cases they don't. That doesn't mean that I won't put them in the article, but sometimes it helps correct mistakes that have been made and pseudomorphs have more questions about their origins and any other group of minerals I think.

Rock Currier
Crystals not pistols.
Re: Pseudomorphs D to I
January 14, 2011 08:03PM
    
Rock, As a pseusomorph afficianado, I especially liked the recent pseudo articles. I note one unusual, and possibly unique, pseudo that seems to be missing, namely the Gypsum pseudo after Tennis Shoe displayed at the Westward Look show in 2008... LOL

Easy Goin'
USA
Re: Pseudomorphs D to I
January 14, 2011 08:24PM
Not unique, Ed! Rock himself found one of those in the acid wastewater ditch when we went to the San Jose mine in Bolivia. We asked the miners how long it took a lost item to get completely encrusted in gypsum and they said "3 weeks", so then we thought we should dump a load of bras and condoms into the ditch and bring the resulting "pseudos" to Tucson... or other objects; something to offend everyone. But we never did it 8-)
Author:

Your Email:


Subject:


Attachments:
  • Valid attachments: jpg, gif, png, pdf
  • No file can be larger than 1000 KB
  • 3 more file(s) can be attached to this message

Spam prevention:
Please, enter the code that you see below in the input field. This is for blocking bots that try to post this form automatically. If the code is hard to read, then just try to guess it right. If you enter the wrong code, a new image is created and you get another chance to enter it right.
CAPTCHA
Message:
Mineral and/or Locality  
Search Google  
Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. 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 thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
Current server date and time: October 22, 2014 12:22:40
Mineral and Locality Search
Mineral:
and/or Locality:
Options
Fade toolbar when not in focusFix toolbar to bottom of page
Hide Social Media Links
Slideshow frame delay seconds