Mindat Logo
bannerbannerbannerbanner
Welcome!

Chalcocite

Posted by Rock Currier  
avatar Chalcocite
December 24, 2009 01:35AM
This Article is Under Construction






Click here to view Best Minerals C 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?



Chalcocite
Cu2S Monoclinic

Chalcocite & Calcite, Levant Mine, Cornwall, England©


Chalcocite, Bristol, Connecticut, USA ~2.5cm wide©


Here will go a general discussion of chalcocite and chalcocite specimens.


Chalcocite
Australia
Queensland, Mt Isa - Cloncurry area, Gunpowder District, Mount Gordon, Mammoth Mine

Chalcocite 3.6cm wide© Rob Lavinsky
Chalcocite 3.5cm wide © Rob Lavinsky


Chalcocite 3.6cm wide© Rob Lavinsky
Chalcocite 3.2cm wide© Rob Lavinsky


Chalcocite 3cm wide© Rob Lavinsky
Chalcocite 2.1cm wide© Rob Lavinsky


Chalcocite 2.9cm wide© Rob Lavinsky


Chalcocite
Australia
Western Australia, Pilbara Region, East Pilbara Shire, Telfer Mine

Chalcocite 2.2 x 1.7 x 1.4 cm© Rob Lavinsky

This mine produced some killer specimens, including sharp prisms as long as your finger, with excellent lustre. Sensation at Tucson several years back (2001?) with prices to match and illustrated on the front cover of Australian Journal of Mineralogy Vol. 12, No.1 (http://www.mineral.org.au/pubs/ajm.html).



Chalcocite
Chile
Atacama Region, Chañaral Province

Chalcocite on Calcite ~7.5cm wide©



Chalcocite
Congo, Democratic Republic of
Katanga (Shaba)

Chalcocite 1.6cm tall© fabreminerals.com
Chalcocite & Calcite 1.3cm tall© fabreminerals.com


Chalcocite
Congo, Democratic Republic of
Bouenza Department, Boko Songho District, M'Passa Mine

Chalcocite ~30cm wide©
Chalcocite 5cm tall© Peter Haas


Chalcocite
Congo, Democratic Republic of
Katanga (Shaba), Kipushi, Kipushi Mine (Prince Léopold Mine)

Chalcocite 4cm wide© Martins da Pedra



Chalcocite
Germany
Baden-Württemberg, Black Forest, Wolfach, Oberwolfach, Rankach valley, Clara Mine

Chalcocite FOV 3mm© Stephan Wolfsried



Chalcocite
Kazakhstan
Karagandy Province (Qaragandy Oblysy; Karaganda Oblast'), Dzhezkazgan (Zhezqazghan)

Chalcocite & Calcite 9.4cm tall© Rob Lavinsky
Chalcocite & Barite 10cm tall© Dan & Diana Weinrich Minerals


1.2cm Chalcocite on Calcite© C. Stefano '09
Chalcocite 2.7cm tall© Rob Lavinsky


Chalcocite
Kazakhstan
Karagandy Province (Qaragandy Oblysy; Karaganda Oblast'), Dzhezkazgan (Zhezqazghan), Dzhezkazgan Mine (Zhezqazghan Mine)

Chalcocite & Calcite 6cm wide© Arliguie M
Chalcocite 1.7cm wide© Rob Lavinsky


Chalcocite
Namibia
Otjikoto (Oshikoto) Region, Tsumeb

Chalcocite 3.4cm wide© Rob Lavinsky
Chalcocite 2.4cm wide© Kristalle and Crys


Chalcocite
Russia
Urals Region, Bogoslovsk

Chalcocite ~7cm tall ©



Chalcocite
UK
England, Cornwall

Chalcocite & Quartz 3.7cm tall© Rob Lavinsky
Chalcocite 2.5cm wide© C. Stefano '09


Chalcocite ~8cm wide©
Chalcocite 2.3cm tall© CCURTO2009


Chalcocite
UK
England, Cornwall, Camborne - Redruth - St Day District

Chalcocite 4.2cm tall© Rob Lavinsky
Chalcocite 1.4cm© Dan & Diana Weinrich Minerals


Chalcocite
UK
England, Cornwall, Camborne - Redruth - St Day District, Illogan, Carn Brea and Tincroft United Mine, Carn Brea Mine (incl. Tregajorran Mine)

Chalcocite 4cm© Paul Bongaerts
Chalcocite 2.6cm wide© fabreminerals.com


Chalcocite
UK
England, Cornwall, Camborne - Redruth - St Day District, Illogan, Carn Brea and Tincroft United Mine, Cook's Kitchen Mine

Chalcocite ~7cm tall©
Chalcocite 2.5cm tall© Rob Lavinsky


Chalcocite
UK
England, Cornwall, Camborne - Redruth - St Day District, Illogan, Carn Brea and Tincroft United Mine, Tincroft Mine

Chalcocite 4.3cm wide© Weinrich
Chalcocite ~4cm wide?© J.Ralph


Chalcocite
UK
England, Cornwall, Mount's Bay District, Crowan, Crenver & Wheal Abraham (incl. Wheal Sarah; Great Drym Consols)

Chalcocite ~6cm wied©



Chalcocite
UK
England, Cornwall, St Ives District, St Ives, St Ives Consols (incl. Wellesley Mine; Wheal Mary)

Chalcocite 3.5cm tall©
Chalcocite 4.5cm tall© Rob Lavinsky


Chalcocite ~7cm wide©
Chalcocite ~7cm tall©


Chalcocite ~7cm wide©
Chalcocite ~4cm wide©


Chalcocite ~15cm wied©



Chalcocite
UK
England, Cornwall, St Just District, St Just, Pendeen, Geevor Mine (North Levant Mine)

Chalcocite 3.2cm tall© TVM
Chalcocite 2.5cm© Steve Rust


Chalcocite
UK
England, Cornwall, St Just District, St Just, Trewellard, Levant Mine

Chalcocite on Calcite ~7cm tall©
Chalcocite on Calcite ~7.5cm wide©


Chalcocite on Calcite ~7cm wide©
Chalcocite ~11cm wide©


Chalcocite
USA
Arizona, Yavapai Co., Black Hills (Black Hill Range), Verde District, Jerome

Chalcocite ~3.5cm wide ©



Chalcocite
USA
Colorado, Clear Creek Co., Idaho Springs District

Chalcocite ~6cm tall©



Chalcocite
USA
Connecticut, Hartford Co., Bristol, Bristol Copper Mine

Chalcocite 5.3cm tall© Rob Lavinsky
Chalcocite & Calcite 3.9cm tall© Rob Lavinsky


Chalcocite ~7.5cm wide©
Chalcocite 4cm wide© Collectors Edge
.
Chalcocite ~5cm wide©


Chalcocite & Calcite ~5cm tall©
Chalcocite ~7.5cm wide©
.
Chalcocite ~12.5cm wide©


Chalcocite ~4cm tall© Jeff Scovil
Chalcocite ~7cm tall©


Chalcocite ~7cm wide©
Chalcocite ~5cm wide©


Chalcocite twin ~2.7cm wide ©
Chalcocite ~4cm tall©


Chalcoite twin on Calcite ~5cm wide©
Chalcocite on Calcite ~7cm wide© 2010 Harold Moritz


Chalcocite
USA
Montana, Silver Bow Co., Butte District (Summit Valley District)

Chalcocite on Quartz ~5cm wide©
Chalcocite ~3cm wide©


Chalcocite 7cm wide© Rockpick Legend Co.
Chalcocite 3cm tall© Rob Lavinsky


Chalcocite
USA
Montana, Silver Bow Co., Butte District, Butte, East Colusa Mine

Chalcocite ~16cm wide©



Chalcocite
USA
Montana, Silver Bow Co., Butte District, Butte, Steward Mine

Chalcocite 2.9cm wide© Dan & Diana Weinrich Minerals



Chalcocite
USA
New Jersey, Passaic Co., Little Falls Township, Houdaille Quarry (Consolidated Stone and Sand Company Quarry; Consolidated Quarry)

Chalcocite & Chrysocolla 7mm wide© AK2008



Chalcocite
USA
New Jersey, Somerset Co., Bridgewater Township, Chimney Rock Quarry (Houdaille Industries Quarry; The Bound Brook Quarry; Stavola Industries Quarry)

Chalcocite ~5cm wide©
Chalcocite on Calcite 12.5cm wide© EAS 2008


Chalcocite
USA
New Mexico, Grant Co., Santa Rita District, Santa Rita, Chino Mine (Santa Rita Pit; Santa Rita Mine)

Chalcocite coating Pyrite 2cm © 2001 John H. Betts
Chalcocite coating Pyrite 1.8cm© 2001 John H. Betts


Chalcocite
USA
New Mexico, Sandoval Co., San Pablo, Nacimiento Mine

Chalcocite after Wood ~17cm wide© 0



Chalcocite
USA
New Mexico, Torrance Co., Scholle, Abo Mine

Chalcocite after wood ~4cm wide©



Chalcocite
USA
Texas, Clay Co.

Chalcocite after wood ~9cm wide©



Chalcocite
USA
Wisconsin, Rusk Co., Ladysmith, Flambeau Mine

Chalcocite 5.5cm wide© 2002 John H. Betts
Chalcocite 10cm wide© 2003 John H. Betts


Chalcocite 5.5cm tall© Rob Lavinsky
Chalcocite 3.6cm tall© Rob Lavinsky


Chalcocite 2.7cm wide© Rob Lavinsky
Chalcocite 6.5cm© Rob Lavinsky


Chalcocite 9.8cm tall© Rob Lavinsky
Chalcocite 11.5cm tall© Rob Lavinsky


Chalcocite 5.5cm wide© A&M
Chalcocite 2.7cm wide© Rob Lavinsky


Chalcocite 3cm wide© Rob Lavinsky
Chalcocite 3.4cm wide© Weinrich Minerals, Inc.






Click here to view Best Minerals C and here for Best Minerals A to Z and here for Fast Navigation of completed Best Minerals articles.

Rock Currier
Crystals not pistols.



Edited 20 time(s). Last edit at 08/24/2012 11:58AM by Ralph Bottrill.
avatar Re: Chalcocite
December 24, 2009 03:07AM
    
Chalcocite
Flambeau Mine,
Ladysmith, Wiscsonsin, USA
4.4cm across

avatar Re: Chalcocite
December 24, 2009 10:34AM
Ryan, I need you to upload the image to the mindat gallery and not just attach it to a thread posting. There are copyright considerations that must be addressed on the image upload page.

Rock Currier
Crystals not pistols.
avatar Re: Chalcocite
December 09, 2010 12:34AM
    
(1) Cornwall.

Chalcocite was very common in Cornish mines, but not everywhere well crystallized. The most famous localities are:

- Crenver and Wheal Abraham
- Botallack Mine
- Levant Mine
- St Ives Consols
- Tincroft Mine

Good ones also came from

- Dolcoath Mine
- Carn Brea Mine
- Cook's Kitchen Mine
- Geevor Mine
- various mines at Gwennap

There should be enough photos in the database, so we should only choose those with a proper locality given (not the generic "Redruth" specimens, which can originate from everywhere in the district, and also not those that are just labelled "Cornwall" - unless they are exceptional, of course). I also have another 30 Cornish specimens from well documented localities that are not yet photographed.

Habits are very variable, but there are were also all sorts of pseudomorphs occurring: bornite, djurleite, digenite, covellite and blister copper after chalcocite are known. Except for the blister copper pseudos, they often can't be conclusively identified by visual means only and thus, many specimens traded as chalcocites are actually another mineral. This happened to many djurleites from Geevor, Levant and Botallack, which were passed off as chalcocites before someone performed an analysis and found out what they really were. After this was known by local dealers, however, many specimens with a similar habit were traded as djurleites for exaggerated prices, although they were just chalcocites.

(2) M'Passa Mine, Congo:

Specimens from this mine are awesome, but very difficult to come by.

(3) Dzezkazghan:

Did also produce decent specimens, often in association with tennantite.
avatar Re: Chalcocite
December 09, 2010 02:21AM
I don't think I inserted that picture of the Wisconsin chalcocite in the lead position in the article. I don't think they got good enough for that distinction. I have replaced it with a Cornwall specimen and a Bristol Connecticut specimen that are much better. After I finish the Pseudomorph article, Ill turn my attention to Chalcocite. For the most part I would agree with you about giving priority to those specimens where the specific locality is known, but if the specimen is fine enough, Ill put it in even though its locality is only general.

Rock Currier
Crystals not pistols.
avatar Re: Chalcocite
December 09, 2010 05:49PM
    
The Wisconsin specimen may be altered to bornite. Irridescence with chalcocites is usually suspect.
WERI2011
Re: Chalcocite
January 04, 2011 11:46PM
Ikaite and Glendonite.





Edited 1 time(s). Last edit at 01/05/2011 02:07AM by Rock Currier.
avatar Re: Chalcocite
January 05, 2011 02:10AM
WERI2011

Is the Ikaite a real Ikaite and of so where is it from and how large is it and what steps were taken to preserve it? Where is the glendonite and where is it from?

Rock Currier
Crystals not pistols.
avatar Re: Chalcocite
January 05, 2011 10:07AM
    
And, more importantly, in which way are they related to chalcocite ??
avatar Re: Chalcocite
January 05, 2011 11:13PM
Peter!, didn't you know that Ikaites were really chalcocite according to the latest nomenclature changes? I think they are now somewhere in the new pyrochlore group. Maybe I got that wrong, it is so hard to keep up with the latest changes.

Yes, he should have put his posting over in the Pseudomorphs A to C thread.

Rock Currier
Crystals not pistols.
avatar Re: Chalcocite
October 30, 2011 01:56PM
    
iridescence is what the Wisconsin chalcocite is famous for. it is actually a coating of bornite

-Rowan Lytle

Necessities:
Food, Water, Shelter, Fire, Minerals.
Re: Chalcocite
August 22, 2012 11:46PM
Rock,

Here's another chalcocite replacing wood from the Nacimiento Copper Mine, Sandoval County, New Mexico, USA.

Philip

© 2012 Philip Simmons



Edited 1 time(s). Last edit at 08/23/2012 09:33AM by Jolyon Ralph.
Re: Chalcocite
August 23, 2012 12:12AM
    
Hello Rock,

Didn't know you had it in you, but your reply to Peter was brilliant. It sure put a smile on my face. Thanks
Re: Chalcocite
August 23, 2012 12:55AM
    
The Cananea district, and specifically the Capote Mine in Sonora, Mexico, have produced fine specimens of Chalcosite in the past. See [www.mindat.org]. John S.
Re: Chalcocite
August 23, 2012 07:21AM
One chalcocite locality that is missing is the Telfer gold mine in Western Australia. Produced some killer specimens, including sharp prisms as long as your finger, with excellent lustre. Sensation at Tucson several years back (2001?) with prices to match and illustrated on the front cover of Australian Journal of Mineralogy Vol. 12, No.1 (http://www.mineral.org.au/pubs/ajm.html). Unfortunately only one photo on Mindat, and I don't have any to add.
Cheers,

Ben.
avatar Re: Chalcocite
August 23, 2012 12:56PM
Good point Ben, I just attached one photo, but more are welcome of these world class chalcocites.

Regards,
Ralph
avatar Re: Chalcocite
August 24, 2012 05:12AM
Philip,
Thats quite interesting. Ill put it into the article when I get a chance.

Rock Currier
Crystals not pistols.
avatar Re: Chalcocite
August 24, 2012 05:14AM
Very nice. Ill put it in the article when I get the chance.

Rock Currier
Crystals not pistols.
Author:

Subject:


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

Spam prevention:
Please, enter the code that you see below in the input field. This is for blocking bots that try to post this form automatically. If the code is hard to read, then just try to guess it right. If you enter the wrong code, a new image is created and you get another chance to enter it right.
CAPTCHA
Message:
Mineral and/or Locality  
Search Google  
Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
Current server date and time: September 21, 2014 18:12:55
Mineral and Locality Search
Mineral:
and/or Locality:
Options
Fade toolbar when not in focusFix toolbar to bottom of page
Hide Social Media Links
Slideshow frame delay seconds