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Bustamite

Posted by Ralph Bottrill  
avatar Bustamite
December 28, 2009 09:22AM
This article has been prepared for the Mindat Best Minerals project. The aim of this project is to present information on important localities and specimens for each mineral specie. As new finds are made and new knowledge is made available the individual articles will be revised to include this information. Readers are encouraged to contribute by posting a response in this thread. All revisions will be stored, thus ensuring traceability and availability of previously included information. A complete list of articles can be found in the list of finished Best Minerals articles. To cite this version: Bottrill, R., Currier, R. (2010) Bustamite. revision 1.1. Mindat Best Minerals Project, article "mesg-67-165194". Please be advised that the photos cannot be used without the consent of the copyright holder


Bustamite

CaMn2+Si2O6

triclinic




Bustamite 6.2cm Broken Hill, New South Wales, Australia



A pyroxenoid, related to rhodonite and ferrobustamite. A relatively uncommon mineral found in some metamorphosed manganese deposits, usually massive, and an occaisional lapidary material. The best specimens have arguably come from either the Broken Hill or Franklin mines, but few come out from either area these days.

Bustamite,
Australia,
New South Wales, Yancowinna Co., Broken Hill

Bustamite 4cm tall



Bustamite has been found in several mines in the Broken Hill district, most notably the North mine, but also the ZC and NBHC mines (see below). It is not always easy to confirm the precise provenance however. Specimens were locally abundant and in good large crystals. Most specimens came out in the 1960's and 70's; they are now becoming rare. Most occured as somewhat rounded, pink to brown prismatic crystals in calcite with hedenbergite, galena and sphalerite. Some was quite fibrous, and pale pink to white in colour, in late stage vughs.


Bustamite,
Australia,
New South Wales, Yancowinna Co., Broken Hill, North Mine (North Broken Hill Mine; NBH Mine)

Bustamite FOV 3cm wide
Bustamite ~6cm wide
Bustamite FOV 3cm wide
Bustamite ~6cm wide
Bustamite FOV 3cm wide
Bustamite ~6cm wide



Bustamite,
Australia,
New South Wales, Yancowinna Co., Broken Hill, Zinc Corporation Mine (ZC Mine; NBHC Mine)

1.3 cm Bustamite xl on Galena
Bustamite 10cm wide
1.3 cm Bustamite xl on Galena
Bustamite 10cm wide
1.3 cm Bustamite xl on Galena
Bustamite 10cm wide



Bustamite,
Japan,
Honshu Island, Kanto Region, Tochigi Prefecture, Kanuma

Bustamite ~2.5cm tall
Bustamite ~2.5cm tall
Bustamite ~2.5cm tall



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

Bustamite 9.4cm tall
Bustamite 9.4cm tall
Bustamite 9.4cm tall

Bustamite is fairly uncommon for the Kalahari district, but some massive pink material was suitable for lapidary purposes.


Bustamite,
United Kingdom,
England, Devon, Okehampton area (Northern Dartmoor), Meldon Quarry (British Rail Quarry; British Railways Quarry; B. R. Quarry)

Bustamite 9cm wide
Bustamite 9cm wide
Bustamite 9cm wide



Bustamite,
USA,
New Jersey, Sussex Co., Franklin Mining District, Franklin, Franklin Mine

Bustamite 20cm wide
Bustamite crystal 8cm tall
Bustamite 20cm wide
Bustamite crystal 8cm tall
Bustamite 20cm wide
Bustamite crystal 8cm tall

This is the type locality, and produced some of the best specimens (arguably equal to those from Broken Hill).



RevisionHistory

Revision no date description editor
1.12010 Revision Rock Currier
1.02009 First Draft Ralph Bottrill




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

Regards,
Ralph



Edited 8 time(s). Last edit at 12/18/2015 01:34PM by Olav Revheim.
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