Mindat Mineralogy Messageboard - Best Minerals H http://www.mindat.org/msgboard-74.html Sun, 19 May 2013 04:24:03 +0000 Phorum 5.2.15a http://www.mindat.org/forum.php?read,74,282922,291805#msg-291805 Re: Hemimorphite http://www.mindat.org/forum.php?read,74,282922,291805#msg-291805 I will try to contact Peter Mc Gaw.

Rudolf]]> Rudolf Hasler Best Minerals H Sat, 20 Apr 2013 15:53:13 +0000 http://www.mindat.org/forum.php?read,74,282922,291791#msg-291791 Re: Hemimorphite http://www.mindat.org/forum.php?read,74,282922,291791#msg-291791 I think the largest I have seen came out back in the late 60s and as I recall I once saw a specimen that had one crystal up to about 4 inches. But that was long ago and it may have grown in my memory. Someone like Peter Mc Gaw one of our Mexican experts may be able to give a better answer.
Rock]]> Rock Currier Best Minerals H Sat, 20 Apr 2013 09:48:17 +0000 http://www.mindat.org/forum.php?read,74,282922,291774#msg-291774 Re: Hemimorphite http://www.mindat.org/forum.php?read,74,282922,291774#msg-291774 can somebody tell me what size the biggest Mexican Hemimorphite crystals were? I also would like to know when the best Hemimorphites were found in Mexican mines?

Rudolf]]> Rudolf Hasler Best Minerals H Fri, 19 Apr 2013 22:32:33 +0000 http://www.mindat.org/forum.php?read,74,129400,284420#msg-284420 Re: Best H Minerals - Welcome http://www.mindat.org/forum.php?read,74,129400,284420#msg-284420 Sometimes I am a bit blind because I had a look at the localities map this morning but did not see the number under the box.

Rudolf]]> Rudolf Hasler Best Minerals H Sat, 02 Feb 2013 23:43:59 +0000 http://www.mindat.org/forum.php?read,74,129400,284414#msg-284414 Re: Best H Minerals - Welcome http://www.mindat.org/forum.php?read,74,129400,284414#msg-284414
Go to the "Localities" map on the Hemimorphite page. Just under the map there's a "Show Locality List" box. For Hemimorphite there are 1489 items.

Kevin]]> Kevin Conroy (2) Best Minerals H Sat, 02 Feb 2013 21:24:19 +0000 http://www.mindat.org/forum.php?read,74,129400,284405#msg-284405 Re: Best H Minerals - Welcome http://www.mindat.org/forum.php?read,74,129400,284405#msg-284405 I was trying to find out how many Hemimorphite localities are listed in Mindat's database but did not succeed. I am sure there must be a quick way for that in the statistics. Could you give me a clue?

Rudolf]]> Rudolf Hasler Best Minerals H Sat, 02 Feb 2013 20:05:30 +0000 http://www.mindat.org/forum.php?read,74,282922,283057#msg-283057 Re: Hemimorphite http://www.mindat.org/forum.php?read,74,282922,283057#msg-283057 Rock Currier Best Minerals H Wed, 23 Jan 2013 09:12:22 +0000 http://www.mindat.org/forum.php?read,74,282922,283052#msg-283052 Re: Hemimorphite http://www.mindat.org/forum.php?read,74,282922,283052#msg-283052 you have shown me the New Gallery PHP already. I have been using it all the time and I am really very happy with it.

Rudolf]]> Rudolf Hasler Best Minerals H Wed, 23 Jan 2013 08:35:39 +0000 http://www.mindat.org/forum.php?read,74,282922,283004#msg-283004 Re: Hemimorphite http://www.mindat.org/forum.php?read,74,282922,283004#msg-283004 Rock Currier Best Minerals H Tue, 22 Jan 2013 23:23:23 +0000 http://www.mindat.org/forum.php?read,74,282922,282922#msg-282922 Hemimorphite http://www.mindat.org/forum.php?read,74,282922,282922#msg-282922 Best Minerals H 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? After each set of pictures there should be some descriptive text. If none appears it means that we need someone to tell us about the specimens from that locality and something about the geology of the occurrence.


Hemimorphite
Zn4Si2O7(OH)2·H2O orthorhombic

Hemimorphite from Potosi Mine, Mexico xtl 3,5cm ©

Hemimorphite mainly is a secondary mineral in the weathered portions of zinc deposits which most commonly forms crystalline crusts and layers, also massive, rounded and reniform aggregates and rarely fan-shaped clusters of crystals. The hemimorphic morphology of the crystals that are terminated by dissimilar faces was the reason to name the mineral "Hemimorphite".
There are 1489 localities currently listed in Mindat's database. Only a small number of these occurrences have produced crystals measuring over a centimetre.
The world's best and biggest Hemimorphites have been found in Mexican mines.
Quote
Peter Megaw
"There have been many finds in four principal mines: Ojuela, Potosi and San Antonio Mines at Santa Eulalia and Santo Nino/Bocoyna Mine. It is very hard to put dates on specific finds since so much has come out of the same places over time. Huge variety in crystal habit and especially group morphology...fans, balls, and singles

Biggest I have seen was in Miguel Romero's collection from the Potosi Mine...nearly 30 cm long. Heavily included with Fe-Mn oxides."


Hemimorphite
Angola
Angola, Namibe Province, Namibe City Council, Namibe

Hemimorphite 7 x 7cm © Martins da Pedra



Hemimorphite
Austria
Austria, Carinthia, Gailtaler Alpen & Karnische Alpen, Bleiberg District, Bad Bleiberg, Stefanie Mine

Hemimorphite, Wulfenite, Baryte xls up to 1,5cm © Rudo

Hemimorphite 3,2 x 2,6cm © Josef Huber
Hemimorphite, Calcite 3 x 3cm © Maggie Wilson

Hemimorphite, Calcite xls up to 2cm © Rudo
Hemimorphite, Goethite FOV 4cm © Rudo

Hemimorphite 6cm wide © Rudo
Hemimorphite, Baryte 6 cm wide © Rudo

Hemimorphite on Baryte 7cm wide © Rudo
Hemimorphite on Wulfenite 8cm wide © H. Prasnik

Hemimorphite xls up to 2,5cm © Klehwa

Hemimorphite 2,8 x 2,5cm © Maggie Wilson
Hemimorphite xls up to 2cm © Rudo

There has been a very long mining tradition reaching back to ancient times at Bleiberg until in 1993 the mine had to be closed because of the falling prizes for zinc and lead. Together with the inhabitants of the village many collectors were very disappointed as there had been hope that the marvelous finds of the 2 last decades could be topped. Reason for this was the circumstance that the deeper the Stefanie shaft was driven the better and larger the crystals were which the face workers brought out. At the 13th level of Stefanie Mine which was 695 meters below the surface the very best specimens could be found in the years between 1982 and 1987. The good quality of the minerals especially Wulfenite encouraged the BBU (Mining Company) to let one miner just concentrate on rescuing these treasures. In this time collectors were able to buy minerals at the Mining Company's Directory.
The ancient Pb-Zn mines of the Bleiberg area which had to be closed in 1993 because of falling prizes for lead and zinc produced over 50 different minerals with some of them in excellent quality. Best known minerals from there are: Wulfenite (Bleiberg is the type-locality), Hemimorphite, Cerussite, and Calcite.
Hemimorphite is a very common mineral in the deep reaching oxidation zone of this famous locality. In 1975 and 1986 some specimens were found with crystals in sizes up to 2,5cm which are unsurpassed in Europe.
Geology: Sedimentary Pb-Zn mineralizations in triassic limestones (Wetterstein formation) and intercalated carbonatites. The valley is believed to have been part of a marine rift system in the triassic age. The main ores are galena (nearly free of silver) and cadmian sphalerite. Due to fault systems, the oxidation zone extends to depths of more than 600 m in some areas of the district (Stefanie mine, Bad Bleiberg). Within the deposit, the galena content decreases to the west: at Kreuth (Max mine), sphalerite was more abundant than galena. Identical mineralizations are found in superimposing layers (Cardita formation, basal main dolomite) to the north. Together, these rocks form a several km wide zone that extends far up the Gail valley (to the west). Within this zone, numerous small Pb-Zn deposits with similar mineralizations are located (e.g. Jaukenhöhe, Radnig near Hermagor, Förolach, Zuchengraben and Schliwagraben near St Stefan, Mitterberg, Golsernock near Stockenboi and Burg near Rubland).


Hemimorphite
Brazil
Brazil, Minas Gerais, Vazante, Vazante Mine

Hemimorphite 7 x 5cm © Brhounds
Hemimorphite 3,4 x 3,8cm © Brhounds



Hemimorphite
China
China, Hubei Province

Hemimorphite, Quartz 5,3 x 3,3cm © Safaa Yu



Hemimorphite
China
China, Yunnan Province, Honghe Autonomous Prefecture, Gejiu Co., Gejiu Sn-polymetallic ore field, Eastern Sub-district, Laochang ore field (Laochang Mine)

Hemimorphite, Veszelyite 12,5 x 9,8cm © Rob Lavinsky

Hydrothermal Sn-Be vein-type deposits.
Located about 11 km SE of Gejiu City.


Hemimorphite
China
China, Yunnan Province, Wenshan Autonomous Prefecture

Hemimorphite 17,1 x 11,6cm © Rob Lavinsky
Hemimorphite 8 x 6cm © Safaa Yu

文山壮族苗族自治州, 云南省, 中国


Hemimorphite
China
China, Yunnan Province, Wenshan Autonomous Prefecture, Wenshan Co., Wenshan Mine

Hemimorphite 10,6 x 8,6cm © Rob Lavinsky
Hemimorphite 13,4cm © Paul De Bondt

Hemimorphite 10,8 x 6,4cm © Rob Lavinsky
Hemimorphite 15 x 11,8cm © Rob Lavinsky

Hemimorphite 7,9 x 4,9cm © Rob Lavinsky

A zinc mine, that produces aragonite and, less commonly, hemimorphite of predominantly blue and white, and, more rarely, green colour. It is known for world class, deep blue hemimorphite specimens with a fine surface growth, resembling okenite. Up to now, only two lots of these specimens were found, one discovered in 1990/1991, the other in 1999.


Hemimorphite
Democratic Republic of Congo (Zaire)
Democratic Republic of Congo (Zaïre), Katanga (Shaba)

Hemimorphite 4,5 x 3cm © Rob Lavinsky
Hemimorphite 4,5 x 4,4cm© Rob Lavinsky



Hemimorphite
Democratic Republic of Congo (Zaire)
Democratic Republic of Congo (Zaïre), Katanga (Shaba), Kipushi, Kipushi Mine (Prince Léopold Mine)

Hemimorphite 6,3cm © Paul De Bondt

A Zn-Pb-Cu mine featuring a suite of Zn-Pb-Cu-Fe sulfides with accessory Ga, Ge, Mo, W & V mineralization in dolomite and schist dolomite series of the Kundelunguian. Located just outside of the southern portion of the Katanga (Shaba) Cu zone/belt, 32 km SW of Lubumbashi.


Hemimorphite
France
France, Midi-Pyrénées, Hautes-Pyrénées, Lourdes, Germs sur Oussouet

Hemimorphite 14cm wide © Yves Masson



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

Hemimorphite 6,5 x 3,5cm © Edmund Ratajczak

A quarry in upper devonian limestones, disseminated by lead, zinc and copper bearing veins.
Located 1.5 km NNE of Rohdenhaus, NW of Wülfrath.
Following a fatal accident involving a mineral collector in 2008 the quarry management does not allow any mineral collecting in the quarry at least for the year 2009. In the future the management will review its point of view. (Update: no permits in 2010 and 2011.)
Update 2011/2012: Sadly, the quarry management has decided not to allow any further collecting on the site.


Hemimorphite
Iran
Iran, Esfahan Province (Isfahan Province; Aspadana Province)

Hemimorphite about 20cm wide ©

From 2001 Joshaghan Kamu city integrated Joshaghan Ghali, Kamu, Chogan & Shahrak e Vahdat. Joshaghan Ghali consists of 14 sectors now.


Hemimorphite
Iran
Iran, South Khorasan Province, Nehbandan, Qaleh-Zari Mine (Ghale Zari Mine)

xls up to 2,5cm © Vachik Hairapetian June 2006
10,5 x 10,7cm © Vachik Hairapetian June 2006

15 x 9cm © Vachik Hairapetian June 2006
10 x 5,5cm © A.lalehgani

Hemimorphite 6 x 4,5cm © A.Lalehgani

Iron oxide-copper-gold (IOCG) deposit, consisting of specularite-rich veins with copper, gold and silver ores, hosted in Jurassic shale and sandstone in the core of an anticline. The ore typically grades at 2-9& of Cu, 0.1-0.65 g/kg of Ag and 0.5-35 mg/kg of Au.
The deposit was explored in 1969-1972 and has been mined since 1972. The minerals of the mine were not displayed for more than three decades. Recently, it produced very fine and aesthetic specimens, particularly of calcite, hemimorphite and quartz.
Located in South Khorasan province, WNW of Nehbandan and about 180 km SSW of Birjand city.


Hemimorphite
Iran
Iran, Yazd Province, Bafq (Bafgh)

Hemimorphite xls up to 2,5cm ©

A small town in Yazd Province.


Hemimorphite
Ireland
Ireland, Co. Tipperary, Silvermines District

Hemimorphite, Cerussite, Galena 7,5 x 6,5cm © Barry Flannery



Hemimorphite
Ireland
Ireland, Co. Tipperary, Silvermines District, Ballygown South Mine

Hemimorphite, Limonite 65 x 60mm © Barry Flannery



Hemimorphite
Ireland
Ireland, Co. Wicklow, Glendalough, Van Diemen's Land mines

Hemimorphite, Quartz 8cm across © Dr Stephen Moreton



Hemimorphite
Italy
Italy, Sardinia

Hemim. 8,8cm © Rob Lavinsky
Hemimorphite FOV 1cm © 2009, JGW



Hemimorphite
Italy
Italy, Sardinia, Carbonia - Iglesias Province, Iglesiente District

Hemimorphite 7,5 x 5cm © Paolo Pastore



Hemimorphite
Italy
Italy, Sardinia, Carbonia-Iglesias Province, Buggerru, Malfidano mine

Hemimorphite FOV 2,5cm © Norman King

Old Pb-Zn mine.


Hemimorphite
Italy
Italy, Sardinia, Carbonia-Iglesias Province, Domusnovas, Is Murvonis Mine

Hemimorphite on Fluorite & Quartz 2cm wide © Antonio Gamboni



Hemimorphite
Italy
Italy, Sardinia, Carbonia-Iglesias Province, Domusnovas, Oridda, Sa Duchessa Mine

Hemimorphite balls up to 2,4cm © Chinellato Matteo

Hemimorphite cube = 1cm © Chinellato Matteo
Hemimorphite on Quartz up to 5mm © GiovanniFraccaro



Hemimorphite
Japan
Japan, Kyushu Region, Oita prefecture, Saeki city, Kiura mine (Shin-Kiura mine; Kiura emery mine)

2,5 x 2,5cm © Maggie Wilson
Hemimorphite 2cm © 2008, JGW

Tin mining began in the 16th or 17th century. Pyrometasomatic ore produced by Miocene granitic intrusion into Paleozoic sedimentary rock. Famous for its large scorodite crystals, impossible to obtain now. A vein of emery also occurred at this mine and emery has been commercially exploited.


Hemimorphite
Mexico
Mexico, Chihuahua

Hemimorphite, Rosasite ©



Hemimorphite
Mexico
Mexico, Chihuahua, Mun. de Aquiles Serdán, Santa Eulalia District

Hemimorphite xls up to 2,5cm © 2001 John H. Betts
Hem., Dolomite 6 x 4cm © 2003 John H. Betts

Hemimorphite 4,4 x 2,8cm © Rob Lavinsky
Hemimorphite 5,5 x 5,5cm © Rob Lavinsky

Hem., Calcite 4,7 x 4,5cm © Rob Lavinsky
Hemimorphite 4,5 x 4,2cm © Dan & Diana Weinrich Minerals

Hemimorphite 8,7 x 5,5cm © Rob Lavinsky
Hemimorphite 3,7 x 3,5cm © Rob Lavinsky

Hem., Calcite xls up to 3,9cm © fabreminerals.com
Hemimorphite 7,6 x 6,6cm ©

5,6 x 2,2cm © Rob Lavinsky
Hemimorphite, Calcite 10,4 x 6,2cm © Rob Lavinsky



Hemimorphite
Mexico
Mexico, Chihuahua, Mun. de Aquiles Serdán, Santa Eulalia District, East Camp, San Antonio Mine (San Antonio el Grande Mine)

Hemimorphite 2,3 x 2,1cm © Rob Lavinsky
Hemimorphite 9,8 x 8,5cm © Rob Lavinsky

Hemimorphite 16,3 x 9,8cm © Rob Lavinsky
5,3cm © Dan & Diana Weinrich Minerals

Mine features Cock's ore body.
The name "San Antonio El Grande" is often used, but is erroneous, the name is taken from the Mexican government topographic sheets, but has never been applied to this mine by its operators. There is a San Antonio El Chico in the western part of the district.
Quote
Peter Megaw
The San Antonio Mine in the East Camp also has distinctive and excellent hemimorphites...easily distinguished from the West Camp materials...and much more "Ojuela-like". San Antonio samples tend to form fans and balls (like Ojuela) of uniformly white crystals...the best coming from the southern end of the 8th Level. The 4th and 6th Level have also produced some interesting specimens associated with secondary lead minerals. There was a moderate find on the 4th level of fans of hemimorphite heavily dusted with lustrous black plattnerite in 2004 or 2005...the rarest were also dusted with bright yellow mimetite. When I worked in the mine, I collected some huge botryoidal hemimorphite specimens on nthe 6th level...with botryoids up to 20 cm across..some dusted with plattnerite. Pale blue hemimorphites have come out recently (2010-2012) from the 8th Level of the mine in the area near the smithsonite finds of the last 15 years. There are also hemimorphites that form the matrix to beautiful blue rice-grain smithsonites from the same area.


Hemimorphite
Mexico
Mexico, Chihuahua, Mun. de Aquiles Serdán, Santa Eulalia District, West Camp, Aquiles Serdán, Potosí Mine

Hemimorphite xls up to 6cm ©

Quote
Peter Megaw
There is hemimorphite throughout the lower parts of the oxide zone in the West Camp of Santa Eulalia...I hve been in caves 25m wide, 50m tall and 250m long that are lined with a 15 cm thick rind of crystalline...but ugly...hemimorphite.

The "classic" West Camp hemimorphites (pre-1980) are the sharp clear blades with white rhombohedral calcite (NOT dolomite). Very similar material comes from Ojuela. These come from the Potosi Mine...probably on the 8th level. I was never sure I found the right place for thse when I was underground there.

The best West Camp hemimorphites came out in the 1980s from the Oxide Zinc orebody that lies between the 13 and 16th Levels of the Potosi Mine. This is a carrot shaped, 35,000 tonne body of supergene zinc mineralization...averaging 35% Zn!. It is dominantly composed of Fe-Mn-Zn oxides and hemimorphite. (the matrix of the hemimorphites is the main ore) It is also the source of both the green and purple adamites, nice willemite (some on ebay at the moment), chalcophanite and both red and colorless calcite with distinctive blocky twinning. The body appears to be a supergene infilling of an oxidation-solution feature...dissolved by the acids generated through oxidation of overlying sulfide bodies. the mineralization is laced with horizontal sag pockets into which the various minerals grow...some are filled completely, some have hemimorphite crystals to 20 cm in them. This body has produced the gemmiest hemimorphites I have ever heard of...water clear and up to 2 cm long. I have had gems faceted from broekn crystals...biggest is over 11 carats! The best of this came out prior to 1991 when production was halted, but good finds were made afterwards and actually continue to be made (I jst got a few superb pieces with red oxide inclusions/phantoms)


Hemimorphite
Mexico
Mexico, Chihuahua, Mun. de Aquiles Serdán, Santa Eulalia District, West Camp, Francisco Portillo, Potosí Mine (El Potosí Mine)

Hemimorphite 2,5 x 2cm © Rob Lavinsky
Hemimorphite 5,4 x 3,3cm © Rob Lavinsky

Hemimorphite 10 x 8cm © Mark Mauthner
Hemimorphite 7,5cm tall ©



Hemimorphite
Mexico
Mexico, Chihuahua, Mun. de Aquiles Serdán, Santa Eulalia District, West Camp, Minerales Shaft 5

Hemimorphite, Adamite 5,2 x 4,1cm © Dan & Diana Weinrich Minerals

Minerales Shaft 5 is the main man shaft at the Potosi Mine in the West Camp.


Hemimorphite
Mexico
Mexico, Durango

Hemimorphite ©



Hemimorphite
Mexico
Mexico, Durango, Mun. de Mapimí

Hemimorphite 4 x 2,5cm © 2003 John H. Betts



Hemimorphite
Mexico
Mexico, Durango, Mun. de Mapimí, Mapimí

Hemimorphite 3,5 x 6cm © YCL
Hemimorphite FOV 12,5mm © Chinellato Matteo

Hemimorphite ©



Hemimorphite
Mexico
Mexico, Durango, Mun. de Mapimí, Mapimí, Ojuela Mine

Hemim., Mimetite 9 x 5cm © Michael C. Roarke
Hemimorphite 7cm © Paul De Bondt

Hemimorphite, Rosasite FOV 4mm © Pierre Rondelez

Hemim., Mimetite 6 x 4cm © Marek Patus
Hemimorphite 2,4 x 2,5cm © Danny Jones

Hemimorphite, Rosasite FOV 8mm

Hemimorphite 3,5cm © B.Z. Kantor
Hemimorphite FOV 10,5mm © Yaiba Sakaguchi

Workings included the Cumbres stope; Esperanza stope; Ojuela stope (15th level); San Diego stope; San Judas stope (13-14th levels); San Pointe stope (14th level); Santo Domingo stope (5th level); and the Socavon shaft. Mine includes the Americanna, Americados, Norte & Ojuela entrances.

IMPORTANT NOTE: Many minerals sold as coming from the Ojuela mine are in fact from other Mexican localities such as mimetites (Velardena or Santa Eulalia), smithsonites (Santa Eulalia), pyromorphites (San José mine near Guazapares or Zimapan, Hidalgo), "endlichites" (Sierra de los Lamentos) etc. etc. (Moore, 2008).


Hemimorphite
Morocco
Morocco, Souss-Massa-Draâ Region, Ouarzazate Province, Djebel Saghro (Jbel Saghro), Bou Skour district, Agoulzi Mine

Hemimorphite xls 1,5mm ©
Hemimorphite, Rosasite FOV 2mm ©

A copper-zinc-lead mine south of the Bou Skour mine.
The mine was started in the oxidized zone that provided secondary minerals, but is now operated in the non-oxidized deeper levels yielding sulfides.


Hemimorphite
Namibia
Namibia, Karas Region, Lüderitz District, Rosh Pinah, Skorpion Mine

Hem., Tarbuttite 3cm © C. Stefano '10
Hemimorphite 5,2cm © David J. Eicher

Hemim. 7,5cm © www.spiriferminerals.com
Hemim. 6,5cm © www.spiriferminerals.com

Hemimorphite FOV 6cm © Leon Hupperichs

The Skorpion mine, located about 40 km north of the Orange River, the border between Namibia and South Africa & is 25 km north north west of the Rosh Pinah mine, an oxidic zinc deposit, the main ore being sauconite. The host rock is folded metamorphosed arkose, interbedded with tuff and underlain by a non-mineralized limestone.

"Opened in 2000 and operated by Anglo American Corporation, this US$454 million mining operation is expected to produce 150,000 tonnes of high grade zinc per year over a life of at least 15 years.
It is the largest investement in Namibia since independence, and is expected to contribute up to 4% to Namibia's GDP."


Hemimorphite
Republic of Congo
Republic of Congo (Brazzaville), Bouenza Department, M'fouati District, M'fouati

Hemimorphite 11,6 x 6,8cm © Rob Lavinsky
12,9 x 8cm © Dan & Diana Weinrich Minerals

"Mfouati lies about 55km west of Mindouli and is dominated by a large limestone hill with managanese wad filled fractures that were mined for primarily for lead,and zinc with some subordinate copper. I have verified cerussite, wulfenite, azurite, malachite, chrysocolla, hemimorphite, smithsonite from this locality. Apparently there are a number of small prospects within a 5km radius of M'fouati which furnish wulfenite crystals but I was not able to verify these occurrences." (Demetrius Pohl, [www.mindat.org] )


Hemimorphite
Republic of Congo
Republic of Congo (Brazzaville), Pool Department, Mindouli District, Kimbedi

Hemimorphite 5,2 x 3,7cm © Rob Lavinsky
7,2 x 4,7cm © Brian Kosnar - Mineral Classics

Kimbedi is a small village on the railroad between Mindouli and Lutete.


Hemimorphite
Romania
Romania, Bihor Co., Nucet, Băiţa Mining District (Baita Bihor; Rézbánya)

Hemimorphite ©

Old mining district (Au, Ag, Cu, U).
The former Hungarian name, Rézbánya, literally means "copper mine".


Hemimorphite
Romania
Romania, Caraş-Severin Co., Banat Mts, Ocna de Fier-Dognecea District, Dognecea (Dognácska; Dognaczka)

Hemimorphite 7,2 x 6,5cm © Rob Lavinsky

Skarn-type Pb-Zn deposit.

Hemimorphite
Russia
Russia, Eastern-Siberian Region, Transbaikalia (Zabaykalye), Taininskii Mine

Hemimorphite 8 x 5cm © 2002 John H. Betts



Hemimorphite
Slovakia
Slovakia, Košice Region, Rožňava Co., Ochtiná, Mária-Margita Mine

Hemimorphite xls 8mm © Martin Števko

Small base metal deposit. Hydrothermal mineralization is bound to Carboniferous limestones.


Hemimorphite
Spain
Spain, Andalusia, Almería, Benahadux

Hemimorphite, Rosasite FOV 1,5mm © Luigi Mattei



Hemimorphite
Spain
Spain, Andalusia, Granada, La Peza, Barranco de los Lobos Mine

Hemimorphite FOV 8mm © Pierre Rondelez

Hemimorphite FOV 10mm © Carlos Pareja Photo
Hemimorphite FOV 6mm © Carlos Pareja Photo

A steep ravine East of the town of La Peza.
Mining adits from former lead-zinc mining.


Hemimorphite
Spain
Spain, Basque Country, Vizcaya, Arcentales

Hem. 5 x 4cm © Rafa Muñoz Alvarado
Hem. 5,7 x 4,6cm © Carles Manresa

Hemimorphite 3,5 x 3,3cm © Akhenaton
Hemimorphite 8,9 x 3,1cm © Jodani



Hemimorphite
Spain
Spain, Cantabria, Peñarrubia, Piñeres, Hozarco Mine (Desfiladero de La Hermida)

Hemimorphite, Aurichalcite on Quartz FOV 3 x 2cm © JRGL

This is a small ancient lead mine, located in one of the "walls" of the "Desfiladero de la Hermida", a narrow pass just before the "Picos de Europa" Mountains. Very close to the broad valley of Liebana. This locality is a paradise for the collector, and specifically for the lover of micromounts.


Hemimorphite
Spain
Spain, Cantabria, Sierra de Arnero, La Florida mining area

Hemimorphite FOV 1,3cm © Leon Hupperichs

La Florida mining area is spread out over three localities: Herrerías, Rionansa and Valdáliga and includes two groups of mines: ‘Primera’ and ‘Pablo’ with several mining concessions in each. The mines are, from West to East: La Cuerre, La Isidra, Braña Escondida, Plaza del Monte, Cereceo, Ligorias, and Cuévanos – the last one not being connected to any of the others.
The mines were exploited for Sphalerite (zinc) and Galena (lead). All the mines, except Cuévanos, were connected by galleries.


Hemimorphite
Spain
Spain, Cantabria, Sierra de Arnero, La Florida mining area, Rionansa (Herrerías), La Cuerre Mine

Hemimorphite, Hydrozincite 9,2 x 5,5cm © fabreminerals.com



Hemimorphite
Spain
Spain, Cantabria, Torrelavega, Viérnoles, Nieves Mine (Nieves Quarry)

Hemimorphite, Malachite, Cinnabar FOV 1,5cm ©

The quarry is located in the Dobra Mount. Part of the exploitation belongs to the neighbouring locality of San Felices de Buelna.


Hemimorphite
Spain
Spain, Castile and Leon, León, Sobrado, Antonina Mine (Toral de los Vados)

Hemimorphite FOV 10 x 5mm © Martins da Pedra

A Pb-Zn mine located near Toral de los Vados but in the Sobrado "municipio", worked from 1935 until 1983. After closing, amateur mineralogists have obtained in the higher levels the mine a very interesting suite of Cu-Zn secondary minerals.


Hemimorphite
Spain
Spain, Murcia, Cartagena, Sierra Minera de Cartagena-La Unión, El Estrecho de San Ginés, Cabezo de San Ginés, Precaución Mine

Hemimorphite FOV 4mm © JM. Johannet
Hemimorphite FOV 4mm © JM. Johannet

Hemimorphite FOV 12,45 x 8,2mm © Chollet Pascal

Cabezo de San Ginés is a hill that extends for several villages belonging to Cartagena, so it appears repeatedly in each one.


Hemimorphite
Sweden
Sweden, Västmanland, Lindesberg, Lovisa mine

Hemimorphite FOV 12mm © Torbjörn Lorin

Active Zn-Pb mine. Ore discovered 1985, mine opened 2004.
400 000 ton ore with zinc 22 %, lead 14 % and minor silver. The ore consists of a 0,8 m wide slice, traced down to 300 m below ground.


Hemimorphite
Switzerland
Switzerland, Grischun (Grisons; Graubünden), Albula Valley, Landwasser Valley, Schmitten, Tieftobel

Hemimorphite 8mm wide © Stephan Wolfsried
Hemimorphite 2mm wide © Stephan Wolfsried

Small Pb-Zn-Cu deposit.
The mineralization was re-discovered during road construction works in 1978. An adit was backfilled again, other could be preserved. The oldest works date back to the 15th and 16th centuries.


Hemimorphite
Switzerland
Switzerland, Wallis (Valais), Binn Valley, Im Feld (Imfeld; Feld; Fäld), Lengenbach Quarry

Hemimorphite 3mm wide © Stephan Wolfsried
Hemimorphite 2mm wide © Stephan Wolfsried

World famous metamorphosed sulphosalt/sulphide deposit in sugary dolomite. Mined (in summer only) for specimens.
Located about 1 km southeast of Im Feld.


Hemimorphite
UK
UK, England, Cornwall, Callington District, Lezant, Greystones Quarry

Hemimorphite 55 x 35mm © Ian Jones
Hemimorphite xls 2mm ©



Hemimorphite
UK
UK, England, Cumbria, North and Western Region (Cumberland), Caldbeck Fells, Roughton Gill

Hemimorphite 8cm across © J.Ralph 2004
Hemimorphite ©



Hemimorphite
UK
UK, England, Cumbria, North and Western Region (Cumberland), Caldbeck Fells, Roughton Gill, Roughton Gill Mine

Hemimorphite FOV 1cm © Steve Rust
Hemimorphite 9,3 x 7,1cm © Rob Lavinsky



Hemimorphite
UK
UK, England, Cumbria, South Eastern Region (Westmorland), Ullswater, Glenridding, Greenside Mine

Hemimorphite 20 x 20mm © Ian Jones



Hemimorphite
UK
UK, England, North Yorkshire, North Pennines, Pateley Bridge District, Greenhow, Coldstones Quarry

Hemimorphite, Fluorite xls 3mm © Peter Haas
Hemimorphite pseudomorphs after Calcite up to 1cm © HW

Limestone quarry currently (2004) operated by Hansons for roadstone. There are two mineral veins run through the quarry:
- Coldstones Sun Vein
- Garnet Vein
Both of these have been previously worked for lead and 'old mans' levels have been exposed in the quarry from time to time.
Mineralised material excavated by the quarry is stockpiled then sent to Laportes Mill in Derbyshire.


Hemimorphite
UK
UK, England, Shropshire, Callow Hill-Bog District, Snailbeach, Snailbeach Mine

Hemimorphite on Quartz 1mm © Steve Rust



Hemimorphite
UK
UK, Scotland, Dumfries & Galloway (Dumfries-shire), Wanlockhead, New Glencrieff Mine (Wanlockhead Mine; East and West branch of New Glencrieff Vein)

Hem., Vanadinite xls up to 1,5mm © Steve Rust
Hemimorphite FOV 1cm © Steve Rust



Hemimorphite
UK
UK, Scotland, Strathclyde (Lanarkshire), South Lanarkshire, Leadhills

Hemimorphite 35 x 30mm © Ian Jones

Old lead-zinc mining area, part of the Leadhills-Wanlockhead Mining District (see Wanlockhead, [www.mindat.org]).


Hemimorphite
UK
UK, Scotland, Strathclyde (Lanarkshire), South Lanarkshire, Leadhills, Horners Vein (Jeffrey's Vein; Carse's Vein)

Hemimorphite 3mm wide © Steve Rust

Many of the minerals collected from this vein, are from a dump at the intersection of Horner's vein and Raiks vein. Jeffrey's and Carse's veins are the northward exstentions of Horners Vein.


Hemimorphite
UK
UK, Wales, Ceredigion (Dyfed; Cardiganshire), Llangynfelyn, Tre-Taliesin, Brynarian Mine (Cardigan Bay Consols Mine)

Hemimorphite FOV 8mm © Steve Rust

This small mine worked a number of veins which cross in the centre of the mine. The records of working start from 1849 to 1853, and in 1869. It would appear that the best ore was mined well befor the above dates.
Recorded output:
294 tons of lead ore
53 tons of zinc ore


Hemimorphite
UK
UK, Wales, Wrexham (Clwyd; Denbighshire), Minera, Minera (mines)

Hemimorphite xls 1,5mm ©
Hemimorphite xls 3mm © C.Thomson 2008



Hemimorphite
UK
USA, Arizona, Cochise Co., Mule Mts, Warren District, Bisbee, Cole Mine (Cole shaft; Cole No. 3)

Hemimorphite 3,5 x 2,5cm © Danny Jones

A former large output underground Cu-Ag-Bi mine located in the S½NE¼ sec. 21, T23S, R24E, approximately 1½ miles WNW of Warren, on private land. One of the major Calumet and Arizona Company mines. Owned at times, or in part, by the Lake Superior & Pittsburg Development Co., Calumet & Arizona Mining Co., and the Phelps Dodge Corp.

Mineralization is partially oxidized copper ores in irregular replacement orebodies in relatively unaltered Cambrian Abrigo and Devonian Martin limestones along the Dallas fault zone and adjacent fracture zones.

Local structures include common pre-mineralization faulting and tilting. Main fault directions are N10W to N40E and S30W to N50W.

Workings include a deep shaft. Probably produced several hundred thousand tons of ore; included in Calumet & Arizona and Phelps Dodge totals after 1915.


Hemimorphite
USA
USA, Arizona, Gila Co., Dripping Spring Mts, Banner District, Hayden area, Chilito, 79 Mine (79th Mine; Seventy-Nine Mine; Seventy-Nine property; McHur prospect)

Hem., Stilbite 2,4 x 1,8cm © Sapphirious
Hemimorphite 2,7cm across © Michael Cline

Hemimorphite 4,9 x 3,5cm © Rob Lavinsky
Hemimorphite 9,2 x 7,8cm © Rob Lavinsky

4,4 x 3cm © Dan & Diana Weinrich Minerals
4,1 x 2,5cm © Dan & Diana Weinrich Minerals

Hemimorphite 2,9 x 2,4cm © RPellar
Hemimorphite 6,7 x 4,3cm ©

A former underground Pb-Zn-Cu-Ag-Au-Mo-Sb-V-Fe mine located in the SE¼ sec. 21 and sec. 28, T4S, R15E (Hayden 7.5 minute topo map), about 1½ miles W of Chilito ghost town, 4.5 miles NNW of Hayden, 2 miles NW of Toronado Peak, on federal land. Discovered 1879 by Mike and Pat O'Brien. Purchased 1921 by Continental Commission Co.; Purchased May, 1922 by the Seventy-Nine Mining Co. and reconveyed back to the Continental Commission Co. (1919-1922, 1923-1926) after litigation. Sold at public auction in 1926. Reopened 1928 by the Seventy-Nine Lead-Copper Co. Closed in January, 1938 due to declining metal prices. Reopened in 1940 by the Shattuck-Denn Mining Corp. until 1949. Acquired by Callahan Zinc-Lead Company, Inc. 1950. Previous owners also included Grisson Mines. Some production until 1951. Owned by the ACM Corp. (1967). Mined for specimens until the late 1990's by John Mediz, Copper City Rock Shop, and others, when mud slides from an El Niño episode intruded into the workings. Subsequently reopened for specimens. As of 1992, site is closed to collectors.


Hemimorphite
USA
USA, Arizona, Gila Co., Dripping Spring Mts, Banner District, Hayden area, Chilito, Keystone Gulch, Reagan claims (Regan/Reagan Camp prospects; Lee Reagan property; Lee Reagan prospects; Kullman-McCool group), Finch Mine (Barking Spider Mine)

Hemimorphite on Wulfenite 3 x 2cm © 2001 John H. Betts

A former underground Pb-V-Cu mine.


Hemimorphite
USA
USA, Missouri, Jasper Co., Tri-State District, Joplin Field

Hemimorphite 7,5 x 4,5cm © Harold (Hal) Prior
Hemimorphite 7,6 x 5,5cm © C. Stefano '12



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

Hemimorphite after Dolomite 9,5 x 6cm © Dan Weinrich



Hemimorphite
USA
USA, Montana, Broadwater Co., Radersburg District (Cedar Plains District; Lone Mountain District), Summit Mine (Old Summit; Montana Silver Star)

Hemimorphite 4cm © 2002 John H. Betts
Hem., Calcite xls up to 3,5cm © 2002 John H. Betts

Hemimorphite xls up to 3cm © Chris Tucker
Hem., Calcite 11 x 9,7cm © Rob Lavinsky

Hemimorphite, Calcite 5,8 x 5,6cm © Dan & Diana Weinrich Minerals

The Summit mine is located in the southern portion of the Radersburg mining district in Broadwater County, Montana. The Summit is the source of the finest hemimorphite specimens in the United States as well as a number of other secondary minerals. The mine lies several miles southwest of Radersburg on the southeast flank of a broad anticline that rises to the west over the Elkhorn Mountains.


Hemimorphite
USA
USA, Nevada, White Pine Co., Robinson District

Hemimorphite 1cm across © 2008 Peter Cristofono



Hemimorphite
USA
USA, Nevada, White Pine Co., Robinson District, Dauntless mine

Hemimorphite FOV 9mm



Hemimorphite
USA
USA, New Jersey, Sussex Co., Franklin Mining District, Ogdensburg, Sterling Hill

Hemimorphite ©
Hemimorphite ©



Hemimorphite
USA
USA, New Jersey, Sussex Co., Franklin Mining District, Ogdensburg, Sterling Hill, Passaic pit (Marshall Mine; Passaic Mine)

Hemimorphite 6,5 x 5cm © 2001 John H. Betts

The Passaic pit is an old open cut workings dating to the late 19th century (circa 1870), operated by the Passaic Zinc Co. It mined an outcropping of altered ore which sets within the folds of the Sterling orebody. Primary zinc ores were weathered principally to hemimorphite "maggot" ore and a suite of secondary manganese, zinc and lead minerals. It is now on the property of the Sterling Hill Mining Museum and is still producing minerals.

Hemimorphite
USA
USA, New Jersey, Sussex Co., Franklin Mining District, Ogdensburg, Sterling Hill, Sterling Mine

Hemimorphite 11 x 6,8cm © Rob Lavinsky
Hemimorphite 8 x 7,5cm © Rob Lavinsky



Hemimorphite
USA
USA, New Mexico, Doña Ana Co., Organ Mts, Organ District, Memphis Mine

Hemimorphite 2,5 x 1,4cm © 2004 Mark Massis



Hemimorphite
USA
USA, New Mexico, Doña Ana Co., Organ Mts, Organ District, Stevenson-Bennett Mine (Stephenson-Bennett Mine)

Hemimorphite 2,6 x 2,2cm © Maggie Wilson

A Pb-Ag mine located NE of Las Cruces.


Hemimorphite
USA
USA, New Mexico, Hidalgo Co., San Simon District, Granite Gap, Vesley Mine

Hemimorphite FOV 6mm © R.D.Green



Hemimorphite
USA
USA, Pennsylvania, Chester Co., Schuylkill Township, Phoenixville Mining District, Wheatley Mines

Hemimorphite 1,5mm wide © Saul Krotki 2004
Hemimorphite 2,7mm © Saul Krotki 2004

This workings represent the consolidation of several earlier workings on the same deposit (Wheatley lode). It was a lead-silver mine. The mine was started in 1851 and closed in the 1860's. It was reopened in 1917 and closed in 1920. The larger enterprise was owned by Mr. Charles Moore Wheatley. Subsequently, when reopened, it was owned by Eastern Mining & Milling Co. The mine consisted of 5 levels with 2,108 meters of horizontal workings, 6 shafts (main engine shaft = 91 meters deep). Rock is adamellite, a granitic intrusive rock of Precambrian age (Mineralization, Triassic period or earlier). Mines include the Wheatley, Brookdale and Phoenix mines.


Hemimorphite
USA
USA, Pennsylvania, Lehigh Co., Upper Saucon Township, Saucon Valley, Friedensville

Hemimorphite ©



Hemimorphite
USA
USA, Utah, Box Elder Co., Pilot Range, Lucin District, Tecoma Hill Mines

6,6 x 4cm © Dan & Diana Weinrich Minerals
6 x 4,8cm © Dan & Diana Weinrich Minerals



Hemimorphite
USA
USA, Utah, Box Elder Co., Pilot Range, Lucin District, Tecoma Mine (Old Tecoma Mine)

Hemimorphite, Plattnerite 6mm © JBS 2006



Best Hemimorphite Micros

Hemimorphite
Germany
Germany, Baden-Württemberg, Black Forest, St Blasien, Urberg, Gottesehre Mine

Hemimorphite FOV 3,8mm © geni 2010



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

Hemimorphite FOV 0,6cm © Harjo
Hemimorphite, Rosasite FOV 0,6cm © Harjo

Hemimorphite, Smithsonite FOV 0,8cm © Harjo
Hemimorphite, Smithsonite FOV 0,6cm© Harjo

Hemimorphite FOV 0,8cm © Harjo



Hemimorphite
Greece
Greece, Attikí (Attica; Attika) Prefecture, Lavrion (Laurion; Laurium) District, Lavrion District Mines, Sounion area

Hemimorphite FOV 3mm © F.Schreiber

Περιοχή Σουνίου, Λαύριο, Αττική, Ελλάδα


Hemimorphite
Greece
Greece, Attikí (Attica; Attika) Prefecture, Lavrion (Laurion; Laurium) District, Lavrion District Mines, Sounion area, Agia Varvara Mines (St Barbara Mines), Barbara Mine

Hemimorphite 1,96mm © Chinellato Matteo
Hemimorphite 3,05mm © Chinellato Matteo

The Barbara Mine has long been known for its beautiful fluorite and aurichalcite specimens that came from this small deposit. It is currently (September 2010) accessible through a short (about 300 m) adit. A deep shaft (43 m) also makes the lower level accessible.


Hemimorphite
Italy
Italy, Lombardy, Bergamo Province, Brembana Valley, Dossena, Paglio Pignolino Mine

Hemimorphite, Plattnerite xtl 1,3mm © Chinellato Matteo

Hemimorphite xls 2,1mm © Enrico Bonacina
Hemimorphite xls 2,15mm © Chinellato Matteo

Hemimorphite xtl 1,14mm © Chinellato Matteo
Hemimorphite xls 3,25mm © Chinellato Matteo

Abandoned mine (now used as a motocross area).
Mineralisation is similar to that of the Zorzone mine.


Hemimorphite
Italy
Italy, Lombardy, Bergamo Province, Brembana Valley, Oltre il Colle, Vedra Valley, Zorzone Mine

Hemimorphite FOV 5 x 3 mm © Enrico Bonacina
Hemimorphite xls 3mm © Enrico Bonacina

Hemimorphite xtl 2,4mm © Enrico Bonacina
Hemimorphite xls up to 1mm © Enrico Bonacina



Hemimorphite
Italy
Italy, Lombardy, Bergamo Province, Seriana Valley, Parre, Trevasco Mount

Hemimorphite xls up to 0,85mm © Enrico Bonacina
Hemimorphite FOV 9 x 7mm © Enrico Bonacina



Hemimorphite
Italy
Italy, Lombardy, Bergamo Province, Seriana Valley, Riso Valley, Oneta

Hemimorphite xls 3,3mm © Enrico Bonacina

Pb-Zn mine.


Hemimorphite
Italy
Italy, Lombardy, Varese Province, Ceresio Valley, Cuasso al Monte

Hemimorphite ball 3mm © D. Preite

NYF-pegmatite. Many quarries in pegmatites.
Famous for rare micromount minerals (REE mineral species and others).


Hemimorphite
Italy
Italy, Lombardy, Varese Province, Ceresio Valley, Cuasso al Monte, Puricelli quarry

Hemimorphite balls up to 3,46mm © D. Preite - M.C.



Hemimorphite
Italy
Italy, Sardinia, Carbonia-Iglesias Province, Domusnovas

Hemimorphite 1,1cm wide © Chinellato Matteo



Hemimorphite
Italy
Italy, Sardinia, Carbonia-Iglesias Province, Fluminimaggiore

Hemimorphite xtl 2,87mm © Chinellato Matteo



Hemimorphite
Italy
Italy, Sardinia, Carbonia-Iglesias Province, Gonnesa

Hemimorphite 1,8mm © Enrico Bonacina



Hemimorphite
Italy
Italy, Trentino-Alto Adige, Trento Province, Valsugana, Vignola-Falesina, Orno Mount mine

Hemimorphite FOV 0,5cm © Giovanni Golinelli
Hemimorphite 5,5mm © Chinellato Matteo

Old mine works (1953-1957) in metamorphic pre-Permian facies with acidic vein systems ("porfirites").


Hemimorphite
Italy
Italy, Tuscany, Livorno Province, Campiglia Marittima, Temperino, Temperino Mine

Hemimorphite FOV 4,8mm © Yaiba Sakaguchi

Hemimorphite FOV 3,3mm © Yaiba Sakaguchi



Hemimorphite
Italy
Italy, Veneto, Vicenza Province, Recoaro Terme, Civillina Mt.

2,8mm © Chinellato Matteo
Hemimorphite 1,35mm © Chinellato Matteo




(Rudolf Hasler 04/29/2013)


Click here to view Best Minerals H and here for Best Minerals A to Z and here for Fast Navigation of completed Best Minerals articles.]]> Rudolf Hasler Best Minerals H Tue, 22 Jan 2013 08:51:41 +0000 http://www.mindat.org/forum.php?read,74,223562,223836#msg-223836 Re: Hastingsite-series http://www.mindat.org/forum.php?read,74,223562,223836#msg-223836
I am a bit reluctant to add this locality [www.mindat.org] to the article without further confirmation on the ID.

For all the amphibole group articles, I have tried to limit the entries to locations where I feel reasonably confident on the ID of the specimens based on litterature references, or at least state that I have been unable to confirm the ID. The hornblende article ( [www.mindat.org]) illustrates how I've tried to cope with the uncertainties in amphibole group species identifications.

For the time being, I think your post is a perfect placeholder for the Stussdalen locality, while we are awaiting further info. I will also add this information to the hornblende article.

Olav]]> Olav Revheim Best Minerals H Mon, 16 May 2011 07:00:40 +0000 http://www.mindat.org/forum.php?read,74,223562,223819#msg-223819 Re: Hastingsite-series http://www.mindat.org/forum.php?read,74,223562,223819#msg-223819 I know how you feel. Sometimes it is like working in a vacuum, but then six months later someone will make a suggestion or chip in with some information that your feel rather dumb you didn't think about it your self, or about something that you didn't even know about and the article will get better.]]> Rock Currier Best Minerals H Mon, 16 May 2011 03:02:24 +0000 http://www.mindat.org/forum.php?read,74,223562,223779#msg-223779 Re: Hastingsite-series http://www.mindat.org/forum.php?read,74,223562,223779#msg-223779
Knut]]> Knut Eldjarn Best Minerals H Sun, 15 May 2011 20:51:56 +0000 http://www.mindat.org/forum.php?read,74,223562,223691#msg-223691 Re: Hastingsite-series http://www.mindat.org/forum.php?read,74,223562,223691#msg-223691
Thanks for the encouragement and support.

It has been very educating for me to write these articles, and I really enjoy doing them.

Since the amphiboles are overshadowed by other more attractive minerals at almost every location. it is often hard to find out much on the quality and availability from the variuos locations, and I would appreciate some input every now and then.


(tu)(:P)

Olav]]> Olav Revheim Best Minerals H Sat, 14 May 2011 22:13:21 +0000 http://www.mindat.org/forum.php?read,74,223562,223644#msg-223644 Re: Hastingsite-series http://www.mindat.org/forum.php?read,74,223562,223644#msg-223644
Spencer.]]> Spencer Ivan Mather Best Minerals H Sat, 14 May 2011 10:37:37 +0000 http://www.mindat.org/forum.php?read,74,223562,223639#msg-223639 Re: Hastingsite-series http://www.mindat.org/forum.php?read,74,223562,223639#msg-223639 Thanks very much for working on this group of minerals. It is not a group that is very popular with collectors, but there are those of us that appreciate these little beasties. I did a few of the borates that I know a little about and we sort of have to rub their noses in these kinds of things a little to make them realize there is more to mineralogy than gem minerals and colorful copper oxide minerals. Although I think we would like to add more of those kinds of things to our collections, given the chance to get them reasonably.
Rock]]> Rock Currier Best Minerals H Sat, 14 May 2011 09:27:05 +0000 http://www.mindat.org/forum.php?read,74,223562,223562#msg-223562 Hastingsite-series http://www.mindat.org/forum.php?read,74,223562,223562#msg-223562 First Draft



Click here to view Best Minerals H , and here for Best Minerals A to Z and here for Fast Navigation for finished 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?


The hastingsite series minerals are minerals in the amphibole group, see Amphibole Group main article for an overview of the group. The series contains the following minerals:

Chloro-potassichastingsite
K Ca2(Fe4Fe)(Si6Al2)O22Cl2

Fluoro-magnesiohastingsite
NaCa2(Mg4Fe)(Si6Al2)O22F2

Fluoro-potassichastingsite
KCa2(Fe4Fe)(Si6Al2)O22F2

Hastingsite
NaCa2(Fe4Fe)(Si6Al2)O22OH2

Magnesiohastingsite
NaCa2(Mg4Fe)(Si6Al2)O22OH2

Potassic-magnesiohastingsite
KCa2(Mg4Fe)(Si6Al2)O22OH2

Potassichastingsite - NOT IMA Approved
KCa2(Fe4Fe)(Si6Al2)O22OH2


Hastingsite 4,5cm© A. Michalsen


The Hastingsite-series minerals lies within the calcio-amphibole subgroup in the amphibole group. They are characterized within this subgroup by having to Al atoms in the T position and ferric iron rather than Al as trivalent ions in the C-positions. Identifying the Fe3+/Fe2+ is paramount for the identification of a hastingsite-series mineral, as the chemical composition is very near the pargasite series, the edenite series, the kaersutite series and other series.

All minerals in this series, except hastingsite and magnesiohastingsite is very rare, with 5 or less locations listed in the Mindat database. Hastingsite is relatively common, but is almost exclusively found with magnetite ore, most often in skarn rocks. The largest and best crystals seems to have come from Franklin Hill in the US.

Magnesiohastingsite is found in several different environments, ranging from skarns, volcanic rocks and alkali rocks, but the presence of ferric iron is necessary for this mineral to form. Again, Franklin Hill seems to have produced the best specimens, although it is difficult to assign an idenity to the older material with any confidence. The Langesundfjord, Norway crystal is also outstanding, as is the Italian micro's.

It is difficult to see how any hastingsite-series mineral specimen can be valuable enough in monetary value to justify a precise identification. As for many other amphibole group specimens the required analytical work is only carried out if the mineral occurs in association with an ore of economical importance or at a location with scientific value.


Hastingsite
Australia
Tasmania, Hampshire district, Kara Mines, Kara #1 Pit

Hastingsite 20mm © Andrew Tuma


The Kara #1 pit is run on magnetite and scheelite in a skarn rock. This rock was formed by Devonian granites intruding Ordovician limestones. There are four independant stages of skarn mineralization, where different mineral assemblages have formed at gradually lower temperatures and more hydrous environments. The amphiboles are one of the main minerals in the third stage, and shoud as such be relatively abundant.

Microprobe analyses indicate that the majority of the skarn minerals are calcic and have high Fe3+/Fe2+. The amphiboles are largely of hastingsite and magnesian hastingsite composition.

Litterature;
"Formation of Magnetite-Scheelite Skarn Mineralization at Kara, Northwestern Tasmania: Evidence from Mineral Chemistry and Stable Isotopes", KHIN ZAW AND BLACKWELL SINGOYI, Economic Geology
Vol. 95, 2000, pp. 1215-1230


Magnesiohastingsite
Italy
Latium, Viterbo Province, Onano, Montenero quarry

Magnesiohastingsite 0,8mm crystals © Enrico Bonacina


Magnesiohastingsite 1mm© AMI-Antonazzo Pasquale
Magnesiohastingsite FOV 1,5mm © Luigi Mattei


The Montenero quarry is operated to extract material for road gravel and mass for the agricultural industry from pyroclastic flows in the Vulsini Volcanic District. The eruptions took placer some 600,000 to 100,000 years ago.

Magnesiohastingsite has been found in cracks in lava boulders as perfectly developed mm sized crystal sprays together with K-feldspar and pyroxene. The magnesiohastingsite was identified by EDS at the University of Rome.

Litterature:

IGNIMBRITIC DEPOSITS IN CENTRAL ITALY: PYROCLASTIC PRODUCTS OF THE QUATERNARY AGE
AND ETRUSCAN FOOTPATHS, G. Nappi, L. Valentini, M. Mattioli, Field trip guide 2004.

Gita sociale e ricerca mineralogica sul terreno nella cava di Montenero Onano (VT), Edgardo Signoretti
Roberto Pucci, Pubblicazioni Gruppo Mineralogico Romano, 2007


Hastingsite
Italy
Tuscony, Livorno Province, Elba Island, Capoliveri, Cape Calamita Mine (Calamita Mine)

Hastingsite, 5,5 cm specimen© Dan Weinrich


Hastingsite is found in an iron rich skarn with magnetite pseudomorphs after hematite as the primary ore mineral. This location is one of many classic iron mines on the island of Elba. Iron ores from Elba Island have been mined without interruption for almost three millennia, since the early Etruscan mine workings (early 1st Millennium BC: Corretti and Benvenuti, 2001) up to about twenty years ago (1981, closure of the Ginevro mine). At least 60 million tons of Fe ore have been extracted from Elba deposits from ancient times to the present.

The Cape Calamita mine has probably been mined since Etruscan or Roman time, with industrial mining starting in the 1960-ties. From 1860 to 1920 an estimated 2mill tonnes of ore was extracted. The skarn at Cape Calamita occurs on the border between a granittic intrusion ( Mt Calamita fm) and carbonate rocks ( limestones and marbles, locally dolomittic). Both an andradite-skarn and a hedenbergite-ilvaite skarn has been mined here, and both beautiful garnet and ilvaite specimens are known.

Hastingsite has not received much attention from neither miners, petrologists or mineral collectors, and little information is available on it's appearance. Cape Calamita is nevertheless one of the most frequent sources for larger hastingsite specimens, either alone or with ilvaite.

Litterature: SKARN DEPOSITS IN SOUTHERNTUSCANY AND ELBA ISLAND (CENTRAL ITALY). M. Benvenuti, M. Boni, L. Meinert. Field trip guide book B18, 2004


Hastingsite
Japan
Honshu Island, Chugoku Region, Okayama Prefecture, Takahashi City, Sampo mine

Hastingsite 5 cm tall© 2008, JGW


The Sampo Mine is one of the typical contact metasomatic ore deposits of the Chuhgoku Province and was emplaced
at the contact of Paleozoic limestone and slate with Late Cretaceous granite( Matsueda,1973,1980). The skarns here are iron rich, and are worked for magnetite ore.

Hastingsite is found in the skarn body, and is confirmed in the Handbook of Mineralogy. I have not found any information on haw common hastingsite is at this locality and how good the specimens get.


Hastingsite
Norway
Vestfold, Larvik, Tvedalen, Saga Pearl quarry

Hastingsite 4,5cm© A. Michalsen


Hastingsite is one of the amphiboles found in the Larvik plutonic complex. Although care should be taken when atttributing a name to one of them, Larsen et.al. (2010) provides a "rule of thumb" on amphibole identifiocation based on local changes in geochemistry. The black amphiboles in the Tvedalen area and further west are normally ferro-edenite, whereas the amphibole in the Larvik/Tjølling area are hastingsites or magnesiohastingsite. Further east, towards Sandefjord, the black amphibole are normally magnesiokatophorite.

Hastingiste normally occurs as prismatic crystals with rough surfaces. It can occationally show well defined faces in vugs. Well developed crystals exceeding 5 cm in length are known.

Literature:

Alf olav Larsen (ed) (2010): The Langesundfjord, history, geology. pegmatites, minerals. Bode Verlag

Fluoro-magnesiohastingsite
Romania
Hunedoara Co., Simeria, Uroi Hill (Arany Hill)

Fluoro-magnesiohastingsite FOV 4mm © Vincent Bourgoin


The Uroi hill quarry is the type locality for fluoro-magnesiohastingsite. Where it occurs in small cavities of an altered hematite-rich xenolith in the quaternary ( 1,6 mill years old) trachyandesite. Associated minerals are: titaniferous hematite, augite, phlogopite, enstatite, feldspar, tridymite,titanite, fluorapatite, ilmenite and pseudobrookite.

Fluoro-magnesiohastingsite is found as reddish-brown to yellowish crystals up to 3mm long. The type material gave the following composition: (Na0.50K0.22Ca0.17)0.89Ca2.00(Mg4.03Fe3+0.70Al0.13Ti0.13)4.99(Si5.89Al2.11)8.00O22.00F2.00.

Litterature: Fluoro-magnesiohastingsite from Dealul Uroi(Hunedoara county, Romania): Mineral data and crystal structure of a new amphibole end-member, HANS-PETER BOJAR and FRANZ WALTER, Eur. J. Mineral.
2006, 18, 503-508.


Magnesiohastingsite
Slovakia
Bratislava Region, Bratislava Co., Bratislava, Staré Mesto, Kalvária

Magnesiohastingsite 7cm©


This location is pretty much downtown Bratislava, near the main railway station. I have not been able to find any information on this location.


Hastingsite
USA
New Jersey, Sussex Co., , Franklin Mining District, Ogdensburg, Sterling Hill , Sterling Mine

Hastingsite 5mm© Christopher O'Neill


A thorough description of this location is given in the very good Mindat article “The Mines of Sterling Hill, Ogdensburg, New Jersey”, Daniel E Russel (Link to Sterling Hill article ), and also at the web page [franklin-sterlinghill.com] which gives and extensive presentation of the mining operations, the minerals and the history.

In many ways, the the history of the amphiboles was re-written upon the release of Leake’s “ Nomenclature of the amphiboles” was published in 1978. With the introduction of “the 50% rule” for every position in the amphibole molecule, the majority of the older quantitative chemical analysis was no longer sufficient to positively ID an amphibole. This was also the case for the amphiboles here.

Hastingsite was first identified in 1983 ( Reilly) as an alteration product of diopside. Dunn (1995) has done more work on the amphiboles and he is also trying to tie his work back to earlier (pre-Leake) work, but suffers in that the amphiboles have been little studied. It appears that most of the black-green amphibole associated with magnetite is hastingsite, and much of the black amphibole (as described by Kloos 1886) appears to be intermediate between the hastingste and magnesiohastingsite end members. This is of interest since some of these older crystals can be really large. The largest recorded being 18 x 6 in (almost 50 x 15 cm).

Previously, what now is believed to be (magnesio)hastingsite has been called hornblende, and also jeffersonite and gamsigradite have been used. Note that other amphiboles than hastingsite has been called hornblende, so that an old specimen labeled hornblende is not necessarily a hastingsite-series mineral.


Fluoro-potassichastingsite
USA
New York, Orange Co., Town of Tuxedo, Greenwood mine (Patterson mine)

Fluoro-potassichastingsite 14x10 cm © Jake Slagle


This location is an iron mine in magnetite ore southeast of Arden in Tuxedo in a hornblende gneiss host rock.
Fluoro-potassichastingsite, is found in compact aggregates of crystals up to 1 cm size on the waste-rock dump and is associated with magnetite, diopside, enstatite, pyrrhotite, chalcopyrite, pyrite and, rarely, phlogopite.
The published type analysis gave the following composition: (K0.59Na0.25) 0.84 (Ca1.87Na0.13) 2.00 (Fe2+2.60Mg1.56Fe3+0.53Al0.26 Mn0.03Ti0.01) 4.99 (Si6.36Al1.64) 8.00 O22.68 [F1.11(OH)0.73Cl0.16] 2.00

Litterature: "FLUORO-POTASSICHASTINGSITE FROM THE GREENWOOD MINE, ORANGE COUNTY, NEW YORK: A NEW END-MEMBER CALCIC AMPHIBOLE"
Marian V. Lupulescu1, , John Rakovan2, M. Darby Dyar3, George W. Robinson4 and John M. Hughes5
The Canadian Mineralogist; August 2009; v. 47; no. 4; p. 909-916



Magnesiohastingsite
USA
New York , Orange Co., Town of Warwick, Amity

Magnesiohastingsite FOV 5cm©


“The Town of Warwick, New York, covers approximately 104 sq. miles. Amity, along with Edenville, is among many unincorporated areas within the town. Amity is approximately 2 miles west of Edenville and these locality designations represent essentially the same area. Virtually all the minerals listed for the Amity – Edenville area are derived from the Franklin Marble. Amity is near the center of the marble outcrop belt but Edenville is actually east of it in country underlain by Paleozoic dolomites and slate
This area has attracted collectors since the early 19th century. Since the landscape is generally gentle and outcrops are small and scattered it was originally a “stone wall fence” locality. A few outcrops that yielded unusual mineral assemblages, such as vesuvianite or large spinels, were thoroughly excavated with gunpowder. In the present era the area is gradually suburbanizing and so exposures are occasionally available in the foundation excavations for the new McMansions.”
The above is quoted from the Mindat locality description.

The pictured specimen is in the collection of Arizona mineral museum and it’s identification is confirmed by rruff.org.

May 2011, Olav Revheim

Click here to view Best Minerals H , and here for Best Minerals A to Z and here for Fast Navigation for finished Best Minerals articles.]]> Olav Revheim Best Minerals H Fri, 13 May 2011 15:02:39 +0000 http://www.mindat.org/forum.php?read,74,204207,213957#msg-213957 Re: Hornblende-Series http://www.mindat.org/forum.php?read,74,204207,213957#msg-213957 Let me congratulate you on doing a fine job on the article. You have learned the fine art of arranging and tweaking the images to make them look attractive including the addition of the period to provide a spacing between vertically stacked images and think you are only the third person to learn how to do this. I am glad you made the announcement about finishing the first draft for the article in the general forum, but don't feel bad if no one or only two or three people respond to your request for further information. You will find that in time that the responses will come dribbling in and bit by bit you can improve and add to your article. Make sure that the fast navigation links appear at the bottom of the article as well as the top and put the date when you finished the first draft at the bottom of the article so that when you or someone else in the future wants to add to the article they can use that date to look in the image bank for new images that have been uploaded. Also make sure that you add Hornblend, Ferrohornblende, Magnesiohornblende and Fluormagnesiohornblende to the fast navigation list in the Welcome to Best Minerals forum.. Once again congratulation on an excellent job.]]> Rock Currier Best Minerals H Thu, 17 Feb 2011 08:43:56 +0000 http://www.mindat.org/forum.php?read,74,204207,204207#msg-204207 Hornblende-Series http://www.mindat.org/forum.php?read,74,204207,204207#msg-204207 First draft



Click here to view Best Minerals H , and here for Best Minerals A to Z and here for Fast Navigation for finished 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?

Magnesiohornblende and Ferrohornblende are minerals in the Amphibole group, see Amphibole Group main article for an overview of the group. In addition to these IMA approved minerals, the article also includes hornblende and Fluoromagnesiohornblende.

Ferrohornblende
☐[Ca2][Fe4Al][AlSi7O2][(OH)2 monoclinic

Magnesiohornblende
☐[Ca2][Mg4Al][AlSi7O2][(OH)2 monoclinic

Fluormagnesiohornblende ( Not IMA Approved)
☐[Ca2][Mg4Al][AlSi7O2][(F,OH)2 monoclinic

Hornblende (NOT a valid mineral)
(Ca,Na,K)2–3(Mg,Fe,Al)5(Al,Si)8O22(OH,F)2 monoclinic


ferrohornblende 0,92mm© Chinellato Matteo


The name "Hornblende" as a term is widely used for many species of amphibole minerals, and used to be a valid mineral name with the chemical formula (Ca,Na)2–3(Mg,Fe,Al)5(Al,Si)8O22(OH,F)2. This general formula covers almost all minerals in the sodic-calcic-clino-amphibole and calcic-clino-amphibole subgroups. "Hornblende" is still used as a handy name to describe dark amphiboles within these subgroups, but this is rather misleading, and " amphibole group" should be used although this is only one step away from "ugly black rock". With this discredited, wider definition of the "mineral", "hornblende" was considered a common mineral in many different geological settings of igneous and metamorphic origin.

Today, the minerals magnesio- and ferro-hornblende are specified with a lot narrower chemical boundaries. The hornblende minerals are closely related to the tremolite-actinolite series ( contains less Al), tschermakite-series (contains less Si) and the edenite-series (contains Na or K in the A position). There are continuous series between all of these minerals ( and more), and the composition is often intermediate between several different minerals as illustrated by the classical "hornblende" from Arendal, Norway. Magnesio- and ferro-hornblende have similar physical appearance to several of the other amphibol group minerals as well, making identification without chemical and structural analysis impossible.

Even if it is many years since the name "hornblende" was redefined, there are still some confusion about how and when an amphibole species can be assigned a name in the hornblende-series. For many of the amphibole entries in Mindat the name "hornblende" is probably (obviously) used as a field term for any dark amphibole, and the naming in these cases provides little sense ( Yes, I am guilty of doing it aswell). Even IMA approves the use of "hornblende" as a general term describing an unspecified dark amphibole group mineral in the calcio-clino-amphibole subgroup, but without placing "hornblende" in the formal amphibole hierarchy. It also seems that for some locations the old name "hornblende" is substituted with ferrohornblende. This practice is plain wrong and definately misleading. I suspect that some of the entries in this article may fall in this category.

Many museum species or specimens from classic localities are labelled "hornblende", and quite often this naming is backed by a chemical analysis supporting the discredited name. Unfortunately, a chemical analysis alone does not help much, as the individual amphibles found in nature will normally be of an intermediate composition, and a given chemistry may be attributed to a number of species based on how the different elements are organized in the amphibole structure. I have included quite a few of these specimens in the article, highlighting in each case that these "hornblende" specimens may in fact be a different species. Where I have found a chemical analysis published on the net, I have included this in the description.

The number of confirmed ferrohornblende and magnesiohornblende entered into the Mindat database is not impressive. I suspect this is partly due to the fact that determining the the exact species is a quite expensive and tediuos task, and partly because the hornblende series minerals is not that common in isolated well formed crystals. Based on the few entries, it seems that the ferro- and magnesiohornblende most frequently occur as phenocrysts in lava flows or as small crystals in cavities in volcanic rocks or contact zones. Some magnificent photographs of ferrohornblende from the Italian lava flows are included in the article. Ferrohornblende is also confirmed from the metamorphic iron ores of Northern Sweden, where large, well formed crystals often covered with stilbite or calcite. The large crystals of magnesiohormblende from Akland, Norway have formed in a metagabbro with partial hydrothermal alteration.

Normally these amphibles are not very popular amongst collectors as it is hard to see how a specimen can be very attractive. Also, the cost of accurately identifying a specimen will exceed the value of the specimen itself many times. It appears that Ferro-hornblende and magnesio-hornblende is identified from locations rich in variuous minerals and that identifying the mineral species is worthwhile only to avoid listing "unidentified amphibole group" mineral on the mineral lists. Common for most of these locations is that more than one amphibole group mineral is present, so that identification by simple means is still very difficult.


Hornblende
Canada
Ontario, Haliburton Co., Monmouth Township ,Tory Hill

4.2 x 1.6 x 1.5 cm hornblende© Rob Lavinsky


There are several amphibole locations categorized under the Tory Hill location. The best known of these are the Bear Lake Diggings described below.

The amphibole crystals occurs in the contact zone between the host rock and calcite veins. Several amphibole-species have been described from this area, and the name "hornblende" is used as a field name for any un-identified amphibole.


Hornblende
Canada
Ontario, Haliburton Co., Monmouth Township ,Tory Hill, Bear Lake diggings (Gibson Road Western occurrence)

Hornblende, 7 cm wide crystal© Jay Vonderhey
Hornblende, 4,2 cm tall crystal© Jay Vonderhey


Hornblende, 5,1 x 4,5 cm crystal group© M. Adamowicz
Hornblende, 4,2 cm tall © Jay Vonderhey

The Bear Lake Diggings are located 8,4 km west of Tory Hill. The mineralization is found in calcite veins up to 1,5m wide and 120 m long. The location is most renowned for fluoraptite crystals up to 50cm long, but nice amphibole crystals up to minimum 20cm have also been found.

Those analyzed has proven to be edenite-, kataphorite- and richterite series amphiboles that are impossible to distinguish without proper analytical work. The term hornblende has been and are used as a convenient name to describe any brown or black amphibole in the calcic- or sodic-calcic subgroup.

To my knowledge, neither magnesiohornblende nor ferrohornblende has been confirmed from this location.


Hornblende
Czech Republic
Bohemia (Böhmen; Boehmen), Ústí Region, Teplice (Teplitz)

Hornblende to 3 cm© C. Stefano '09
,

The pictured crystals are in the collection of the Academy of Natural Sciences of Philadelphia. These crystals was probably collected a long time ago, and where found as crystals embedded in basalt, as described in the locality description for the modern Dolanky basalt quarry near Teplice: "Basalt quarry near small village 10km east by south from Teplice. Top, half mining floor is created on to west by south area pillars of right basalt. This basalt is without cavities and verge into dark stale basalt with large crystals of Amphibole"

These hornblende crystals are an example of amphiboles from old collections that are labeled named hornblende based on the valid nomenclature at the time. Whether or not they would be called hornblende today is quite uncertain.


Hornblende
Finland
Länsi-Suomen Lääni , Turku-Pori , Pargas (Parainen), Ersby

Hornblende, ruler 1 in. long©
,

Specimen is from the collection of the British Museum of Natural History #59416 (1975). The locality at Ersby is an old limestone quarry that was in opration from 1740 - 1800. The total limestone outtake is estimated to 400,000 tonnes. It is not unlikely that this specimen was found when the quarry was in operation.

This is another example of an old specimen labelled hornblende in accordance with the nomenclature of the time. Pargasite was described from Pargas, Finland in 1814, and this specimen may well be a pargasite predating the first description of pargasite as a separate species.


Hornblende
Finland
Lapin (Lapland), Kolari Lääni, ,Hannukainen mine

Hornblende 9,0 cm tall© Jyrki Autio
,

The Hannukainen mine lies in the western margin of Central Lapland greenstone belt (CLGB). It is a deposit that was mined in 1978–1992. The deposit is a iron oxide-copper-gold deposit including five main ore bodies all variably enriched in Au, Ca, Cu, K, Mg, Na, Fe, and S. The ore is hosted by massive to banded diopside-hornblende- and magnetite rocks, in the contact zone between a 1.86 Ga monzonitic intrusion and the supracrustal CLGB rocks. The supracrustal rocks are metamorphosed to lower amphibolite facies. Sulphides and gold postdate diopside, hornblende and magnetite, and the age dating at site suggest epigenetic Au-Cu mineralisation postdating the monzonite by ca. 40 Ma. Native gold, all or most of it, closely associated with chalcopyrite, magnetite and gangue: inclusions in pyrite with chalcopyrite, in cracks is magnetite and pyrite, inclusions in chalcopyrite.

Amphibole minerals can be in three different mineral assemblages:

1) Amphibolite: hornblende-plagioclase ± biotite, titanite, magnetite, epidote.
2) Exoskarn: magnetite-diopside-amphibole-plagioclase ± scapolite, sulphides, epidote, garnet, gold.
3)Endoskarn: 20-200 m wide zone, albite to oligoclase-quartz ± hornblende, diopside, scapolite, epidote, biotite, magnetite, pyrite, chalcopyrite

I think it will be fair to assume that more than one amphibole mineral can be present at this location. I have not found any details on maximum size, quality or composition of the "hornblende" from Hannukainen.


Hornblende
France
Auvergne, Haute-Loire , Le Puy-en-Velay, Espaly-Saint-Marcel , Riou Pezzouliou

Hornblende 1mm tall© François Périnet


This and the next location does not produce outstanding display specimens, and the quality of the specimens from a purely estethic perspective can be discussed. These locations are nevertheless truly remarkable in that the "hornblende" is found in isolated, well formed crystals in alluvial sediments. Amphiboles are prone to both chemical and mechanical degradation and is far rarer in sediments than it's abundance in igneous and metamorphic rocks should indicate.

The Riou Pezzeouliou is a small creek, and hornblende is found in the sediments together with numerous other minerals. The term hornblende is used here, I assume, as a field term for dark amphibole of uncertain composition.


Ferrohornblende
France
Centre, Loiret, Gien, Loire River alluvials

Hornblende 0,3mm tall© François Périnet


At this location, hornblende is found in concentrations of "heavy sands" with numerous other minerals. The pockets of heavy sands is normally below water level.

I have not found any references besides the information provided by the uploader to confirm this amphibole as Ferrohornblende.


Hornblende
Germany
Hesse , Vogelsberg , Ranstadt, Steinknorre

Hornblende 25mm tall© Volker Betz
Hornblende 2,8cm© Christian Bracke

The pictured hornblende crystals was found in outcrops of basalt slags and tuffs on the north slope of Steinknorre hill, 1.5 km south of Ranstadt in a profilic occurence during road cut of B 275 around 1970.This is now (2008) mostly overgrown.
"Hornblende" has been known from the Vogelsberg area for a long time and Thomas Thomsen publishes a chemical analysis as early as 1836 in his "Outlines of mineralogy, geology, and mineral analysis". This analysis ( Silica: 42.24, magnesia: 13.74, Lime: 12,24, Alumina: 13,92, Protoxide of iron: 16,26 and Protoxide of Manganese o,33) indicates that this "hornblende" is of an intermediate composition and only a thorough structural analysis can determin the mineral species.


Hornblende
Italy
Latium , Viterbo Province , Vico Lake, Vetralla, Tre Croci
Hornblende 0,9 mm© Luigi Mattei
,

The Vico vulcano is relatively recent (420,000-100,000 yrs old) and is a stratovulcano with a central caldera, hosting the Vico Lake, and a few small circum-caldera centers. The volcano erupted silica-oversaturated to undersaturated potassic and ultrapotassic magmas.

Like other Roman volcanoes, the Vico pyroclastic rocks contain xenoliths of various origin, including bedrock fragments, intrusive equivalents of lavas, and cumulate rocks. These xenoliths often contain exotic minerals, such as Zr-Ti-Th-U-REE rich phases (e.g. britholite, baddelyite, and pyrochlore), which have been interpreted to be the result of deposition
from late-magmatic fluids rich in incompatible elements (e.g. Della Ventura et al. 1999). The pictured ”hornblende” crystal is probably found in this environment.

Even if magnesiohastingsite is described form some of the trachytes (Pecerillo), it is quite likely that several different amphiboles are present in the lavas, pyroclastics and the termometamorphic xenoliths, due to the varying chemistry of the different lavas and the xenoliths. One should be very careful when attributing a mineral name to an amphibole from here.


Magnesiohornblende
Italy
Latium, Viterbo Province, Onano, Montenero quarry

magnesioohornblende, 2,5mm© Chinellato Matteo



magnesiohornblende 2,2mm© luigi chiappino
Hornblende 1,1mm© Enrico Bonacina
.
Magnesiohornblende, 0,91mm© Chinellato Matteo

Magnesiohornblende at this location occurs in pyroclastic formations, in a similar fashion as the previous location. Magnesiohornblende occurs as mm-sized well developed crystals. Also magnesiohastingsite is described from the location, but this mineral has a different appearance.

The magnesiohornblende is determined by standard two-point SEM/EDX. (Marco E. Ciriotti(2011): Associazione Micro-mineralogica Italiana forum, see also [www.mindat.org]


Hornblende
Italy
Tuscany, Grosseto Province, Pitigliano , Case Collina (Toscopomici quarry )

Hornblende 1,5mm© Enrico Bonacina
,

This location is a part of the Latera Volcanic complex and the mineralization is found in vugs in pumice deposits. The amphibole minerals have not been identified, and it is not unlikely that more than one amphibole mineral is present.


Ferrohornblende
Italy
Campania, Naples Province., Somma-Vesuvius Complex, Monte Somma

ferrohornblende 0,92mm© Chinellato Matteo
ferrohornblende 0,92mm and 0,95mm© D. Preite - M.C.


Ferrohornblende group, 3,24mm largest crystal© D. Preite - M.C.


The Somma-Vesuvius is a composite central volcano composed of an ancient stratovolcano, Mount Somma, and more recently by a cone, the Vesuvius. The age of the oldest products in outcrop is about 25,000 years.The latest round of activity seems to have ended with the eruption of March 1944. This eruption was the beginning of a resting phase characterized by modest signs of seismic activity and fumarole (Arno et al., 1987).
More than 230 species has been found in this area, and is one of the most interesting places in Europe. There are in principle four different mineral forming environments, each with a different mineral assemblage;
I. Minerals that are found in the ejected limestone blocks of Monte Somma.2
II. Pneumatolytic minerals formed in cavities of leucotephrites and conglomeratic blocks ejected by Monte Somma and Vesuvius, or coating the walls of ancient lavas.
III. Fumarolic products.
IV. Minerals that occur as rock constituents of Vesuvius and Monte Somma.
Amphibole minerals can be found in all of these mineral forming environments, but I have not been able to pinpoint a specific environment for the ferrohornblende.


Ferrohornblende
Italy
Campania, Naples Province., Somma-Vesuvius Complex, Monte Somma, San Vito, Ercolano, San Vito quarry,

ferrohornblende 1,4mm© Chinellato Matteo
,

This occurance is an abandoned pumice quarry that has been very rich in minerals. The occurance of feroohornblende in this quarry is confirmed, and it occurs in small ( mm-sized) well formed crystals.


Magnesiohornblende
Japan
Honshu Island , Chubu Region, Nagano Prefecture, Suwa-gun, Fujimi

Magnesiohornblende, 1,5cm © 2008, JGW


These crystals seems to have formed as phenocrysts in volcanic rocks.


Hornblende
Morocco
Meknès-Tafilalet Region, Khénifra Province , High Atlas Mts, Tamazeght complex , Bou-Agrao Mt

Hornblende 8mm© Martins da Pedra
,

The Eocene Tamazeght complex, High Atlas Mountains, Morocco is a multiphase alkaline to peralkaline intrusive complex. A large variety of rock types (including pyroxenites, glimmerites, gabbroic to monzonitic rocks, feldspathoidal syenites, carbonatites and various dyke rocks) documents a progression from ultramafic to felsic magmatism.

According to Marks M. A. W. et al. (2008): listed at a reference for this location, the amphiboles found here are not hornblende:

"Following the nomenclature scheme of Leake et al. (1997), all analyses are calcic amphiboles of hastingsitic (AlVI ≤ Fe3+) and kaersutitic (Ti ≥ 0·5 p.f.u.) composition."


Magnesiohornblende
Norway
Aust-Agder, Risør, Akland

Magnesiohornblende 12cm tall© A. Michalsen
Magnesiohornblnde 7,8 cm tall© ØT

Several minerals at relatively good quality was found at Akland in 2002/2003 in a relatively small area during road construction work at a highway exit. The geological environment are high amphibolite facies/granulite facies metasediments and metagabbros. The magnesiohornblende was found in a large vug system in a gabbro pegmatite with diopside and actinolite and partly covered with small albite crystals.

It seem like that the more than 10cm long magnesiohornblende crystals are pseudomorphs after diopside, as one could follow the different stages of transformation from diopside via magnesiohornblende to byssolite/clays.

I don't know the total amount of specimens that where retrieved from these vugs, but the total volume was sufficient to meet the demand of the domestic market, and specimens should still be available.


Hornblende
Norway
Aust-Agder , Arendal

Hornblende, ruler 1in. long©
,

From 1574 to 1975, some 350-400 mines, quarries and prospects was opened to mine magnetite from skarn rocks. The iron production from the operating mines provided a significant input to the Danish-Norwegian economy through several hundred years. "Hornblende" was one of the main constituents of the skarn rocks together with andradite, epidote, scapolite, plagioclase feldspar and others. Most museums acquiring minerals from 1850 onwards will have mineral specimens from Arendal. Many of the specimens collected are of quite good quality with large (>10cm) well formed crystals formed on the border zone between the skarn and the calcite.

Bjørlykke (1959) has published a chemical analysis of this material, and this analysis seems to indicate that this material may be either actinolite/hornblende series or edenite series based on how Fe, Mg, Al and K/Na are distributed in the amphibole structure. It may also be that an eventual closer investigation of this material may reveal multiple amphibole species with very similar appearance. As most of the specimens secured are in old museum collections and without any significant value, it is quite unlikely that such investigation will take place..

The locations now are mostly inaccessible. All mine shafts are secured and the dumps are either developed as industrial or housing environements, used as gravel material or heavily overgrown, with a very few exceptions.


Hornblende
Norway
Buskerud, Modum, Snarum , Oksøyekollen (Oksøykollen; Oxøiekollen)

Hornblende 45mm tall© AÖ 2010
,


Hornblende
Norway
Telemark , Kragerø , Stussdalen (Studsdalen)

Hornblende 12,2 cm© Rob Lavinsky
Hornblende 12 cm tall© Knut Eldjarn
.
Hornblende 10x10 cm © Knut Eldjarn

Stussdalen is one of the classical "hornblende" localities in Kragerø district, and is used in this article as an example of the a location from the district. Any "hornblende" specimen older then the 1960-ties is probably from another location in the vicinity of this. Stussdalen is still producing specimens with crystals up to 30 cm long. The crystals from Stussdalen are rarely terminated, and if so the terminations are split up into hairlike asbestos.

The location is a small clay(?) filled fracture no more than 5-10m high within an amphibolite body. The "hornblende" crystals can be found as free floating crystals or growing into the clay from the amphibolite. The "hornblende" crystals are crisscrossing within the fracture and it is tedious work to free undamaged crystals.

It is difficlut to free matrix specimens, so most of the specimens from here are single crystals.

I have not seen any of the "hornblende" specimens accurately identified, but as they are found in various geological enironments, it will not surprise me if there are several amphibole species in the area


Fluormagnesiohornblende
Russia
Urals Region ,Southern Urals, Chelyabinsk Oblast', Chelyabinsk coal basin, Kopeisk, Coal mine No. 45

This mineral is one of many that are formed in the burning coal dumps burned spoil-heaps of the Chelyabinsk coal basin, Russia. The new minerals have been formed as a result of local thermal reactions between gases coming from the coal fires and sedimentary carbonates and silicates. The fluorine rich minerals has been formed by reaction between these rocks and fluorine gas. The formation of CaF2 and MgF2 has reduced the required temperature for the ractions to take place. MgF2 combined with very dry conditions are responsible for forming fluoromagnesiohornblende from silicate sediments.


Ferrohornblende
Spain
Andalusia, Almería, Carboneras

Ferrohornblende 1cm tall© Martins da Pedra
Ferrohornblende 2cm © Martins da Pedra

The ferrohornblende(?) is found as phenocrysts in andesine lava.


Ferrohornblende
Spain
Andalusia, Seville , Lebrija ,Minera I Quarry

Ferrohornblende 7x5 cm© E-Minerales
,

It appears from the reference for "ferrohornblende" from this location ( [mti-minas-andalucia.blogspot.com]) that the amphibole from this location is actinolite.


Ferrohornblende
Spain
Canary Islands , Santa Cruz de Tenerife Province , Tenerife, Fuente de Joco

Ferrohornblede 3,3 cm tall© CCURTO08


Ferrohornblende(?) are found as phenocrysts in lava flows.

Ferrohornblende
Sweden
Lappland, Gällivare, Malmberget

Hornblende, Specimen 30x40x50cm© AÖ 2010


Ferrohornblende 6,5cm tall© Jorge M. Alves
Hornblende 12x10 cm© Knut Eldjarn


Malmberget (ore mountain) iron ore mine, located at Gällivare, 75km from Kiruna, contains some 20 orebodies spread over an underground area of about 5 by 2.5km. Seven are currently being exploited. Mining began in 1892, since when over 350Mt of ore have been won.

Malmberget's ores ( mainly magnetite, but also hematite) are hosted in Precambrian volcanic rocks that have largely been metamorphosed to gneisses. Containing apatite-bearing iron ore, the entire deposit complex has been strongly folded and now consists of a number of ore sheets that may have originally been connected. Most orebodies lie within the 6.5km-long main ore zone.

The mineralizaion of interest for collectors are formed later than the ore bodies in large voids in the rock formed by folding action during the methamorphosis. Only a minority of the voids carry crystallized minerals, predominantly calcite and zeolite, but also ferrohornblende ( Lyckberg 2006). Ferrohornblende may occure as large well formed crystals in these voids, sometimes overgrown with stilbite and calcite.

Ferrohornblende
UK
Scotland, North West Highlands (Inverness-shire), Isle of Skye, Luib, Eas a Bradain

Ferrohornblende, 0,7mm© Steve Rust
Ferrohornblende 2,2mm© Steve Rust

The Ferrohornblende from this location is confirmed with XRD and EPMA, and is one of the few locations where a hornblende-series mineral has been positively ID'ed. In addition to Ferrohornblende, several other amphibole species are recorded from the area. Minerals form the Eas a Bradain location consists of various locations within a rather large area (multiple sq.km.)

The minerals are found in miarolic cavities up to 6 cm in an epigranite, and the material is mostly micromounts.


Magnesiohornblende
USA
Massachusetts, Worcester Co., Bolton, Bolton Lime Quarries (Bolton quarry; Whitcomb quarry; Hildreth quarry

Magnesiohornblende 7mm© 2006 Peter Cristofono
,

The Bolton locality consists of two limestone (marble) quarries about 1/8 mile apart, and a lime kiln and dumps in between the quarries. John Whitcomb (1712-1785) is believed to have been the first to work the deposit sometime in the 1730s. The north and larger quarry was known as the Whitcomb quarry. The south quarry was called the Hildreth Quarry. The Whitcomb quarry was operated until the 1860s and reopened briefly in 1937 for 2-3 years.

The quarries are in a limestone (marble) unit enclosed in gneiss. According to Emerson (1917): "Where gneiss is in contact with limestone in the quarries at Bolton a layer of black porphyritic diorite 3 or 4 feet thick is commonly next to the limestone. Where this diorite or the fine biotite granite in the gneiss touches the limestone the layer next to it is in some places composed of vein quartz, but ordinarily it is a thick sheet of scapolite rock, in one place 16 feet thick. Next comes a light green pyroxene hornblende layer and next a layer of boltonite [forsterite] limestone grading into the pure phlogopite limestone."
The magnesiohornblende (analyzed, SEM-EDS) seems to come from the pyroxene/hornblende layer.

Hornblende
USA
Massachusetts , Franklin Co., Hawley

Hornblende. Field of view 9cm© Henry Minot 2010
,


Hornblende
USA
New York, Jefferson Co., Wilna Township, Natural Bridge

Hornblende 7x6x6 cm specimen© 2001 John H. Betts
,

The Jefferson and Lawrence Counties of USA host a large number of great mineral locations in the metasedimentary and metasomatic precambriam rocks formed in the Grenville orogony. The area is one of the classic sources of mineral specimens, shown by the following quote:

“No introduction to the minerals of the western Adirondack region in upper New York State need be given to any one interested in mineralogy. Good crystals from its many localities adorn nearly all mineral collections and most of the easily obtainable show specimens were taken long ago. There is still a great deal left, however, which will repay a trip into the region.”

The quote is taken from “The Minerals of St. Lawrence, Jefferson and Lewis Counties, New York.” By W.M.Agar, Princton University, 1921.

I have not been able to positively conclude that the pictured "hornblende" crystals are in deed hornblende-series minerals. They may well be minerals in the tremolite-hornblende series or edenite series using the current nomenclature. These dark amphibole crystals can, like the tremolite (http://www.mindat.org/mesg-86-198178.html) from the same type of occurances be found in relateively large, well formed crystals.

Hornblende
USA
New York , St Lawrence Co., Russell

Hornblende 2,5cm© 2001 John H. Betts


Fast Navigation for finished Best Minerals articles.

First Draft Completed by Olav Revheim Feb 23rd 2011]]> Olav Revheim Best Minerals H Tue, 30 Nov 2010 21:44:59 +0000 http://www.mindat.org/forum.php?read,74,193280,195594#msg-195594 Re: Hematite - Argentina to Morocco http://www.mindat.org/forum.php?read,74,193280,195594#msg-195594 Steven Kuitems Best Minerals H Wed, 01 Sep 2010 16:59:04 +0000 http://www.mindat.org/forum.php?read,74,195146,195157#msg-195157 Re: Hematite - Namibia to USA http://www.mindat.org/forum.php?read,74,195146,195157#msg-195157 Namibia to USA has been finished.]]> Rock Currier Best Minerals H Sun, 29 Aug 2010 00:54:51 +0000 http://www.mindat.org/forum.php?read,74,193280,195156#msg-195156 Re: Hematite - Argentina to Morocco http://www.mindat.org/forum.php?read,74,193280,195156#msg-195156 Argentina to Morocco has been finished.]]> Rock Currier Best Minerals H Sun, 29 Aug 2010 00:53:11 +0000 http://www.mindat.org/forum.php?read,74,195146,195146#msg-195146 Hematite - Namibia to USA http://www.mindat.org/forum.php?read,74,195146,195146#msg-195146 Hematite Argentina to Morocco and here to view Best Minerals H and here for Best Minerals A to Z and here for Fast Navigation of all Best Minerals articles.


Hematite
Namibia
Khomas Region, Windhoek District, Seeis, Ogonja (Onganja), Emke Mine

Hematite ~10cm wide©



Hematite
New Zealand
North Island, Ohakune

Hematite FOV 1.2cm© Judy Rowe



Hematite
Norway
Akershus, Nittedal, Bjønndalen quarry

Hematite 1cm wide© OT. Ljostad



Hematite
Norway
Buskerud, Modum, Snarum, Dypingdal Serpentine-magnesite deposit

Hematite in/on Lizardite 2.5cm wide © A. Michalsen
Hematite in/on Lizardite 2.5cm wide© ØT


Hematite
Norway
Telemark, Kragerø, Langøy, Rødløgen prospect

Hematite on matrix 5.5cm wide© A. Michalsen



Hematite
Pakistan
Northern Areas, Baltistan, Skardu District, Haramosh Mts., Tormiq valley (Tormic; Tormik; Tormig; Turmiq)

Hematite 10cm tall© 2001 John H. Betts



Hematite
Pakistan
Northern Areas, Baltistan, Skardu District, Shigar Valley, Alchuri (Alchori; Aschudi)

Hematite 2.1cm wide© H. Obodda



Hematite
Pakistan
Northern Areas, Baltistan, Skardu District, Skardu Road

Hematite & Quartz, 5cm tall© khyberminerals.com



Hematite
Portugal
Leiria District, Óbidos, Senhora da Luz

11cm Hematite rose with Prehnite & Tremolite© P.Alves



Hematite
Portugal
Setúbal District, Santiago do Cacém, Cercal (Cercal do Alentejo), Serra do Rossalgar Mine

Hematite 8cm wide© Martins da Pedra



Hematite
Portugal
Setúbal District, Sesimbra, Zambujal

Hematite ~5.5cm wide© Rui Nunes 2007
Hematite ~7cm wide© Rui Nunes 2008


Hematite
Romania
Caras-Severin Co., Banat Mts, Ocna de Fier-Dognecea District, Dognecea (Dognácska; Dognaczka)

Hematite "coolie hats" 5.3cm tall© Rob Lavinsky
Hematite "coolie hats" ~3cm wide©


Hematite "coolie hats" ~7cm wide©
Hematite xls, largest ~2cm©


This locality is mentioned in many old mineralogy texts for its outstanding hematite specimens. The "coolie hats" are unique to this locality as far as I know, and are now rarely seen in collections.

Hematite
Romania
Maramures Co., Cavnic (Kapnic; Kapnik), Cavnic Mine (Kapnikbánya)

Hematite, Stibnite & Baryte 6cm wide© willy



Hematite
Russia
Eastern-Siberian Region, Prebaikalia (Pribaikal'e), Irkutskaya Oblast', Zheleznogorsk, Korshunovskoye (Korzunovskoe; Korzhunovska; Korshunovskiy) Iron mine

Hematite 6cm wide© Anton Ivanov
Hematite 7cm wide© Joseph Polityka


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

Hematite replacing Ilvaite & Quartz 5cm© Shaw



Hematite
Russia
Urals Region, Middle Urals, Ekaterinburgskaya (Sverdlovskaya) Oblast', Ekaterinburg (Sverdlovsk)

Hematite 5cm wide© 2000 John H. Betts



Hematite
Russia
Urals Region, Middle Urals, Ekaterinburgskaya (Sverdlovskaya) Oblast', Ekaterinburg (Sverdlovsk), Shabry (Schabry) Village

Hematite ~5cm tall©



Hematite
South Africa
Northern Cape Province, Kalahari manganese fields

Hematite & Calcite 3.3cm wide© Steve Hardinger



Hematite
South Africa
Northern Cape Province, Kalahari manganese fields, Black Rock, Black Rock Mine

Hematite & Calcite 3.6cm tall© fabreminerals.com



Hematite
South Africa
Northern Cape Province, Kalahari manganese fields, Hotazel, Wessels Mine (Wessel's Mine)

Hematite & Calcite 4.1cm tall© Rob Lavinsky
Hematite 2.8cm wide© Rob Lavinsky


Hematite & Andradite 4.2cm tall© Rob Lavinsky
Hematite & Andradite 4.2cm tall© Rob Lavinsky


Hematite & Barite 5.8cm tall© Rob Lavinsky
Hematite 4cm tall© Rob Lavinsky


Hematite 4.4cm tall© Rob Lavinsky
Hematite & Andradite 10cm tall© Rob Lavinsky


Hematite 10.7cm tall© Rob Lavinsky
Hematite 4.8cm tall© Rob Lavinsky


Hematite & Andradite 3.7cm wide© Rob Lavinsky
Hematite & Calcite 3.6cm tall© Rob Lavinsky


The Wessels mine is a manganese mine and did not produce abundant hematite specimens. Though most of the specimens were not very large, some of them are truly wonderful and the association with micro red Andradite garnets is distinctive. Any collector would be proud to own a fine specimen of hematite from this mine.


Hematite
South Africa
Northern Cape Province, Kalahari manganese fields, Kuruman, N'Chwaning Mines

Hematite 3.8cm wide© 2003 John H. Betts
Hematite 3.4cm wide© Rob Lavinsky


Hematite
Spain
Asturias, Oviedo, Latores

Hematite on limestone 2.4cm© Fabre Minerals
3cm Hematite "rose" on limestone© JRGL


Hematite
Sweden
Värmland, Filipstad, Långban

Hematite 8cm wide© AÖ



Hematite
Switzerland
Grischun (Grisons; Graubünden), Vorderrhein Valley, Tujetsch (Tavetsch)

Hematite & Quartz 7cm tall© fabreminerals.com
Hematite 4cm tall© Michael C. Roarke


Hematite & Rutile ~3.5cm wide©
Hematite 4cm wide© 2003 John H. Betts


Hematite
Switzerland
Grischun (Grisons; Graubünden), Vorderrhein Valley, Tujetsch (Tavetsch), Curnera Valley, Cavradi gorge

Hematite, Quartz & Rutile 7.5cm wide© Kevin Ward
Hematite, Quartz & Rutile 5.4cm wide© Fabre Minerals


Hematite & Rutile ~6cm wide©
Hematite & Rutile ~4.5cm wide©


Hematite, Quartz & Rutile ~4cm tall©
Hematite on Quartz ~9cm wide©
Hematite, Quartz & Rutile 4.5cm wide© Rob Lavinsky


Hematite, Quartz & Rutile ~6cm wide©



Hematite
Switzerland
Ticino (Tessin), Leventina, Central St Gotthard Massif

© 2003 John H. Betts
Hematite 6.3cm wide© Rob Lavinsky


Hematite "rose" on matrix ~4cm wide©
Hematite on Adularia 3.6 cm wide© Dan & Diana Weinrich


Hematite ~9cm wide©
Hematite & Adularia 3cm© Dan & Diana Weinrich


Hematite ~9cm wide©
Hematite & Albite ~8cm wide©


Hematite & Adularia ~10cm tall©
Hematite & Audlaria ~6.5cm wide©
Hematite ~5cm wide©


Hematite
Switzerland
Ticino (Tessin), Leventina, Central St Gotthard Massif, Fontana, Fibbia Mt.

Hematite & Adularia 8cm tall© Joe Budd
Hematite on matrix 5.3cm tall© Christian Bracke


Hematite 8.6cm wide© Christian Bracke
Hematite on Quartz 7cm wide© Christian Bracke


Hematite
Switzerland
Wallis (Valais), Binn Valley, Chummibort, Ritter pass

Hematite "iron rose" on matrix ~20cm wide©


This specimen was found to be fake, glued together a century or so ago. It is no longer in display in Bern1.
1.See page 52 'Die Mineralien der Schweiz' by Max Weibel, Stefan Graeser, Walter F. Oberholzer, Hans-Anton Stalder & Walter Gabriel1990, Birkhauser Verlag, Basel
[Erik Vercammen 2010]


Hematite
Switzerland
Wallis (Valais), Binn Valley, Lercheltini (Lärcheltini) area

Hematite ~5cm wide©



Hematite
United Kingdom
England, Cornwall, Lanivet Area, St Austell District, Lostwithiel, Restormel Royal Iron Mine (Trinity Mine)

Hematite 7.5cm tall© P Trebilcock.



Hematite
United Kingdom
England, Cornwall, St Just District, Botallack - Pendeen Area, Pendeen, Geevor Mine

Hematite 10cm wide© Ian Jones



Hematite
United Kingdom
England, Cumbria

Hematite 3.3cm tall© Rob Lavinsky
Hematite 10.9cm wide© Rob Lavinsky


Hematite 7.3cm wide© Rob Lavinsky


The iron mines of Cumberland, England supplied the iron that helped get the industrial age started and besides the millions of tons of iron it produced, the mines produced wonderful specimens of hematite for generations. At one time they were very abundant and sold by the pound at modest prices. Best known perhaps were the fine specimens of reinform masses often called kidney ore that ranged in color from black to brick red and were found in specimens exceeding 20 cm in diameter. In addition specimens of shiny pyramidal, sometimes doubly terminated quartz crystals growing on a carpet of shiny black hematite crystals. Today fine specimens are difficult to obtain in spite of the tons of specimens that were produced. Many fine examples of these specimens are shown above and below.
[Rock Currier 2010]


Hematite
United Kingdom
England, Cumbria, North and Western Region (Cumberland), West Cumberland Iron Field

Hematite 6cm tall© Rob Lavinsky
Hematite 8.6cm wide© Rob Lavinsky


Hematite 4.5cm wide©
Hematite & Quartz ~17cm wide©


Hematite
United Kingdom
England, Cumbria, North and Western Region (Cumberland), West Cumberland Iron Field, Cleator Moor

Hematite & Quartz ~14cm wide© 2001 John H. Betts
Hematite ~14cm wide©


Hematite & Quartz ~11cm wide©



Hematite
United Kingdom
England, Cumbria, North and Western Region (Cumberland), West Cumberland Iron Field, Egremont

Hematite 14cm wide© Joseph A. Freilich
Hematite, 7cm tall© fabreminerals.com


Hematite & Dolomite 13.5cm wide© Ian Jones
Hematite 6cm wide© 2004 John H. Betts


Hematite 14cm tall© Kristalle and Crys
Hematite 7.2cm wide© Rob Lavinsky



Hematite
United Kingdom
England, Cumbria, North and Western Region (Cumberland), West Cumberland Iron Field, Egremont, Florence Mine

Hematite & Quartz, 10.5cm wide© Kristalle and Crys
Hematite & Quartz 10cm wide© YCL


Hematite 11cm wide© Weardale Rocks
Hematite & Quartz 9cm wide© fabreminerals.com


Hematite 10.6cm wide© Rob Lavinsky
Hematite 13.8cm wide© Rob Lavinsky


Hematite & Quartz 5.6cm© Dan & Diana Weinrich



Hematite
United Kingdom
Cumbria, North and Western Region (Cumberland), West Cumberland Iron Field, Egremont, Beckermet Mine

Hematite & Quartz 5cm tall© 2001 John H. Betts
Hematite & Quartz, 6cm tall© 2001 John H. Betts


Hematite & Quartz, 5cm wide© 2001 John H. Betts
Hematite, Quartz & Calcite 5cm© Peter Haas


Hematite
United Kingdom
England, Cumbria, North and Western Region (Cumberland), West Cumberland Iron Field, Egremont, Ullcoats Mine

Hematite 9cm tall© HW



Hematite
United Kingdom
England, Cumbria, North and Western Region (Cumberland), West Cumberland Iron Field, Frizington

Quartz & Hematite 15cm wide© Rob Lavinsky



Hematite
United Kingdom
England, Cumbria, South Western Region (Furness)

Hematite "needle ore" largest ~11cm wide©




Hematite
United Kingdom
England, Somerset, Wells, Dulcote Quarry

Hematite? in Quartz 14.5cm wide© Russell G. Rizzo


Often hematite and other fine grained iron minerals are responsible for the coloration in many agates and other forms of chalcedony. This is but one modest example, though admittedly from an unusual locality. The analysis of these fine grained limonitic and earthy forms of iron minerals is not an easy task and it is doubtful in this and almost every case of similar specimens pictured on mindat and other sources that a careful analysis has been made minerals responsible for the color. The reason is simple. The cost of doing these analysis would be more than the value of the specimen. So, the people writing the captions for images, like myself, take the cost effective way out and say that they are colored by hematite, or iron minerals. I have many beautiful agates in my collection and to my knowledge not even one of them has ever been analysed to show for sure what their color is caused by. This will be the case of almost all specimens of colored chalcedony in the world.
[Rock Currier 2010]


Hematite
United Kingdom
Scotland, Strathclyde (Ayrshire), Sorn, Auchenlongford Hematite Mine

Hematite 10cm wide© Bill Gordon



Hematite
United Arab emirates
Abu Dhabi Emirate, Arzanah island (Arzaneh island)

Hematite 1.8cm tall© C. Stefano '09



Hematite
United Arab Emirates
Abu Dhabi Emirate, Sir Bani Yas Island

Hematite, one on rt. ~2.5cm©



Hematite
USA
Arizona, La Paz Co., Buckskin Mts.

Hematite 3cm tall© Adam Harper



Hematite
USA
Arizona, La Paz Co., Dome Rock Mts, Middle Camp-Oro Fino District, Big Bertha Mine (Veta Grande Mine; Veta Grande claim; Crystal Caverns claim; Big Bertha Extension Mine)

Hematite & Quartz 4.3cm wide© Rob Lavinsky


Hematite & Quartz ~6cm tall©


Hematite ~5cm wide©
Hematite & Quartz ~5cm wide©


A very small mine, perhaps a prospect might be a better term to describe the place. The adit opened below the crest of a hill and the mine workings may have extended back 100 feet or so. The prospectors who dug it must have been chasing gold values. The first image shown above may be the best hematite specimens the place produced. Specimens from the place were mostly collected by field collectors who broke up quartz boulders on the dump and those that had been moved down the hill by weathering. Most most of good specimens were collected prior to 1960 by field collectors from the metropolitan areas of Arizona and Southern California and no amount of pounding around on the dumps or in the accessible parts of the mine in recent years has produced any notable specimen. Even at its best, the locality has always been a stingy one and fine specimens like those pictured here are rare.
[Rock Currier 2010]


Hematite
USA
Arizona, La Paz Co., Plomosa Mts, Plomosa District, Bouse

Hematite 4.6cm tall© Rob Lavinsky
Hematite 8.9cm tall© Dan Weinrich


Hematite 3.5cm wide© John Sobolewski



Hematite
USA
Arizona, Pinal Co., Dripping Spring Mts, Mineral Creek District (Ray District), Scott Mountain area, Ray Mine

Hematite ~8cm wide©



Hematite
USA
Colorado, Jefferson Co., South Platte Pegmatite District, Buffalo Creek

Hematite 6cm tall© Rob Lavinsky



Hematite
USA
Colorado, Park Co., Lake George

Hematite after Siderite 6cm tall© Russell G. Rizzo
Hematite & Quartz 3cm wide© Russell G. Rizzo
Hematite after Siderite 3.2cm wide© Rob Lavinsky


Hematite after Siderite with Quartz 6.2cm© Rob Lavinsky
Hematite after Siderite 4.8cm wide© Rob Lavinsky


Hematite
USA
Michigan, Dickinson Co., Menominee iron range, Aragon Mine

Hematite ~6cm wide©



Hematite
USA
Michigan, Dickinson Co. Menominee iron range, Norway, Penn Mines

Hematite 7.5cm wide©



Hematite
USA
Michigan, Dickinson Co., Menominee iron range, Vulcan, East Vulcan Mine

Hematite 5cm wide©



Hematite
USA
Michigan, Iron Co. Menominee iron range, Mineral Hills, Sherwood Mine

Hematite 25cm wide©



Hematite
USA
Michigan, Iron Co., Menominee iron range, Stambaugh, Hiawatha Group, Hiawatha No. 1 Mine

Hematite 8.1cm tall© Dan & Diana Weinrich Minerals



Hematite
USA
Michigan, Marquette Co., Ishpeming

Hematite & Jasper 10cm wide© Charles Creekmur

This is a good example of a rock from a banded ironstone formation. It is interbanded black hematite and red jasper. The color in the red jasper is almost certainly caused by finely divided Hematite. When this material is hard enough and compact enough it is used for lapidary purposes and many lapidary items from table tops to beads have been made from this material. It is of not very great interest to advanced mineral collectors, but because the huge banded ironstone formations are so significant in the evolution of the crust of our planet I have included this modest example here in Best Minerals.
[Rock Currier 2010]



Hematite
USA
Michigan, Marquette Co., Ishpeming, Superior Mine

Hematte 20cm tall©


Hematite
USA
Michigan, Marquette Co., Marquette iron range

Hematite ~9cm wide©



Hematite
USA
Michigan, Marquette Co., Marquette iron range, Lake Angeline Mine (East End; Angeline)

Hematite "grape ore" 5cm wide© Walter R. Kellogg




Hematite
USA
Michigan, Marquette Co., Marquette iron range, Marquette

Hematite 18.5cm tall© Rob Lavinsky



Hematite
USA
Michigan, Marquette Co., Marquette iron range, Marquette, Superior mine

Hematite 8cm wide© 2002 John H. Betts



Hematite
USA
Michigan, Marquette Co., Marquette iron range, Negaunee, Jackson mine (South Jackson Pit)

Hematite ~11cm wide©
Hematite 6.8cm tall© Rob Lavinsky


Hematite needle ore ~21cm wide©



Hematite
USA
Missouri, Washington Co., Meramec State Park, Pea Ridge Mine (Sullivan)

Hematite on Calcite ~6cm wide



Hematite
USA
New Hampshire, Cheshire Co., Surry, Mine Ledge

Hematite 6cm tall© 2002 John H. Betts
Hematite 8cm wide© 2002 John H. Betts



Hematite
USA
New Jersey, Sussex Co., Franklin Mining District, Franklin

Hematite 9cm wide©
Hematite 12cm wide©


Hematite twin 3cm wide©
Hematite & Apatite 7cm wide©

Hematites from this locality are primarily of interest only to collectors who specialize in specimens from this locality but some interesting specimens showing rhombohedral partings up to 10 cm on an edge which are sometimes mistaken for cleavage in the mineral.


Hematite
USA
New Mexico, Otero Co., Orogrande District,Orogrande, Jarilla Mountains

Hematite & Quartz 3cm wide©
Hematite & Quartz 4cm wide©


Hematite
USA
New Mexico, Socorro Co., uis Lopez manganese District

Hematite 5.7cm tall© Rob Lavinsky



Hematite
USA
New York, St Lawrence Co., Chub Lake, Chub Lake Prospects

Hematite 3cm wide© 2007 Peter Cristofono



Hematite
USA
Rhode Island, Providence Co., Lincoln, Lime Rock, Conklin quarry

Hematite 10cm wide© 2010 Ken Gliesman



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

Hematite after Magnetite 6.8cm wide© Rob Lavinsky



Hematite
USA
Utah, Beaver Co., Beaver Lake Mts, Beaver Lake District, Iron Mountain Pass deposits

Hematite after Magnetite 8.5cm tall© Rob Lavinsky



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

Hematite after Magnetite 6cm tall© Weinrich
Hematite after Magnetite 6cm tall© Dan & Diana Weinrich


Hematite
USA
Utah, Juab Co., Thomas Range

Hematite 3.3cm wide© Dan & Diana Weinrich Minerals



Hematite
USA
Utah, Millard Co., Twin Peak

Hematite after Magnetite 3.3cm wide© CCURTO08
Hematite after Magnetite© Weinrich


Hematite after Magnetite 4.9cm wide© Hardinger



Hematite
USA
Washington, King Co., Denny Mountain

Hematite 2.3cm wide© Dan Weinrich, Inc.


Denny Mountain is well known to field collectors in the state of Washington, USA and most of the specimens have been collected by collectors, though some have been mined by dealers from surface prospects. This locality is better known for its wonderful quartz crystals, especially its wonderful "raspberry" scepters, but it did produce the occasional hematite specimens, though even the best of them won't compete well with those from some of the more popular Hematite localities.
[Rock Currier 2010]


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

Hematite & Quartz 9.7cm© Rob Lavinsky
Hematite after Epidote ~4cm tall©

These were collected more than 30 years ago by a Washington, USA, collector/dealer/probe runner, Bart Cannon from a pocket outcropping on the surface. He dug several hundred of them and because they were interesting mineralogically he was able to sell them for usually not more than $10 each at the time. But even several hundred items is very little in the over all mineral market place and today you rarely ever see one of these for sale by dealers.


Hematite
USA
Wisconsin, Iron Co., Gogebic Range, Germania Mine (Minnewawa; Harmony)

Hematite ~7cm wide©



Hematite
USA
Wisconsin, Iron Co., Gogebic Range, Hennepin-Snyder Mine (Father Hennepin; Snyder; Pence-Hennepin Mine)

Hematite 7.5cm tall©



Hematite
USA
Wisconsin, Iron Co., Gogebic Range, Montreal Mine (Ottawa; 33 Company Mine; Trimble; Odanah; Moore; Jupiter; Bourne; Sec. 33 Mine)

Hematite 3.4cm tall© Rob Lavinsky
Hematite 10cm tall©


Hematite 12.5cm wide©
Hematite 12.5cm center©


Hematite 12.5cm wide© Dan Weinrich
Hematite ~12cm wide©


Hematite 16.5cm long© Joseph A. Freilich



Hematite "needle" 22cm wide©



Hematite
USA
Wisconsin, Iron Co., Hurley, Cary Mine (Superior; Tilden; Nimikon; West Cary; Kakagon; Windsor)

Hematite 15cm wide©
Hematite ~7cm wide©


Hematite ~5.7cm tall©
Hematite ~7cm tall©


Hematite 11.4cm wide© Rob Lavinsky



Hematite
USA
Wisconsin, Iron Co., Montreal, Plummer mine (Emma; Caledonia; Plumer; Valance; Union; Daylight.)

Hematite 3cm wide©
Hematite 6cm wide ©





Click here to view Hematite Argentina to Morocco and here to view Best Minerals H and here for Best Minerals A to Z and here for Fast Navigation of all Best Minerals articles.]]> Rock Currier Best Minerals H Sat, 28 Aug 2010 22:53:54 +0000 http://www.mindat.org/forum.php?read,74,193280,194935#msg-194935 Re: Hematite http://www.mindat.org/forum.php?read,74,193280,194935#msg-194935 Rock Currier Best Minerals H Thu, 26 Aug 2010 20:31:07 +0000 http://www.mindat.org/forum.php?read,74,193280,194878#msg-194878 Re: Hematite http://www.mindat.org/forum.php?read,74,193280,194878#msg-194878 [www.mindat.org]
was found to be fake, glued together a century or so ago. It is no longer in display in Bern.

See page 52 'Die Mineralien der Schweiz' by Max Weibel, Stefan Graeser, Walter F. Oberholzer, Hans-Anton Stalder & Walter Gabriel1990, Birkhauser Verlag, Basel]]> Erik Vercammen Best Minerals H Thu, 26 Aug 2010 09:47:49 +0000 http://www.mindat.org/forum.php?read,74,193280,194876#msg-194876 Re: Hematite http://www.mindat.org/forum.php?read,74,193280,194876#msg-194876 I think I have fixed most of the problems with the Brazilian Hematite images although there are a few that we left intact pending your checking with Alvaro etc. We could really use some commentary on the various localities and the specimens that come from there, especially Ouro Preto. This is a big town and the hematites must come from various mines near there.
Rock]]> Rock Currier Best Minerals H Thu, 26 Aug 2010 08:38:02 +0000 http://www.mindat.org/forum.php?read,74,193280,194755#msg-194755 Re: Hematite http://www.mindat.org/forum.php?read,74,193280,194755#msg-194755 Good hunting, see you in Denver soon.]]> Rock Currier Best Minerals H Wed, 25 Aug 2010 04:30:13 +0000 http://www.mindat.org/forum.php?read,74,193280,194746#msg-194746 Re: Hematite http://www.mindat.org/forum.php?read,74,193280,194746#msg-194746
I will try to help to clean the mess about some Brazilian localities as much as I can; therefore, now I will start my preparation for Denver, I will be able to start ding it only after my return to Brazil on the end of September.

Thank you for your suggestions, they will save me a lot of time.

Luiz]]> Luiz Alberto Dias Menezes, Fo. Best Minerals H Tue, 24 Aug 2010 22:27:17 +0000 http://www.mindat.org/forum.php?read,74,193280,194674#msg-194674 Re: Hematite http://www.mindat.org/forum.php?read,74,193280,194674#msg-194674 This Hematite and then click on the world icon with the infinity symbol in it and then copy the URL into the field in the little box that will appear and then click OK. This will link your selected text to the image. It will save you from having to laboriously type in the necessary descriptions like you did above. You will note that I edited your message and linked the images you were talking about to the actual images. Now I can click on the links, go directly to the pictures and send complaint letters directly from the big images. You can do this too, and when you start to work on the Brazil images, you will be doing this a lot. By the way, that was an excellent job you did above. I just wish there were not so many more that need cleaning up.]]> Rock Currier Best Minerals H Tue, 24 Aug 2010 08:24:54 +0000 http://www.mindat.org/forum.php?read,74,193280,194669#msg-194669 Re: Hematite http://www.mindat.org/forum.php?read,74,193280,194669#msg-194669 I was hoping that you would show up and take a look at the Brazilian Hematites. When going through them and selecting them I realized it was a bit of a mess. I also have never seen anything but nice sharp bladed hematites from Brumado, but although I had the privileged of spending a week with four friends as a guest of the mine and collecting everything we could, my experience at the locality is not that great. When you can Luis you need to try and find the time to go into the Brazilian localities and first clean up that mess and then start going through the images and cleaning those up. The hematites are just the tip of the iceberg. I already went through and cleaned up about 100 to 200 really obvious amethysts and rutile pictures. Novo Horizonte Rutiles listed as Minas Gerais and RGS amethyst listed as Minas Gerais and Bahia and Artigas amethysts listed as as Minas Gerais or RGS. I think all the managers have confidence in you and I think you can clean up the Brazilian localities pretty much as you wish. If you are a little unsure about the changes you want to make, go to the locality forum or the managers forum and post what you would like to do.

If the pictures are really bad I just consign them to the user gallery only. If they are really obvious errors I just go ahead and fix them. If they are probably errors, I give the unloader the benefit of the doubt and send out a complaint letter telling them what I think about the locality and asking them if they have better information than I do and ask them if they would consider changing the locality. Ill fix the ones that you commented on above. Thanks for you help.]]> Rock Currier Best Minerals H Tue, 24 Aug 2010 06:54:34 +0000