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EducationKabamba Jasper from Tsiroanomandidy Madagascar

17th Oct 2017 14:15 BSTStone Mania

I've been told that Kabamba Jasper aka Kambaba Jasper/Crocodile Jasper comes from an area close to Tsiroanomandidy in Madascsar which is also known as Kabamba/Kambaba. Apparently it's a very small region but having spoken to the Madagascan Tourist Office in Madagascar, they know nothing at all about an area with this name although they are familiar with the stone. There is also nothing reliable on Google about this area and nobody seems to ever have heard of it so I'm hoping someone may be able to shed some light on it or better still, share some information about the mining area where the actual rock is mined.


There's loads of information about Kambaba Jasper online but having done extensive research, I've discovered that little is accurate.


I know there's another thread on here about this stone which I've read but it's more about the geological make-up/structure of the material.


Any information would be hugely appreciated.


Many thanks

18th Oct 2017 12:55 BSTKnut Edvard Larsen Manager

The socallled "Kabamba Jasper" or "Crocodile Jasper" is, according to Madagascar Minerals's homepage [http://www.madagascarminerals.com/cat_crocodile_jasper1.cfm] found in an area quarried by Norcross. Exactly where they do not tell and I don't know.


But assuming that the information pointing to the Tsiroanomandidy area is correct (which I cannot confirm or not confirm), the most likely place to start looking is in the Ambohiby and Bevato intrusive igneous batolites about 15-20 km east of the town Tsiroanomandidy. Veins of rhyolite is described as a rarity within these batolites.


A link to some of the geology with a map in this area you find here http://madadoc.irenala.edu.mg/documents/v03157_ETU.pdf


Yes, the "kabamba Jasper" is not jasper or stromatolites, but a volcanic rhyolite rock; see http://www.epigem.de/index.php/informationen/neue-schmucksteine/75-nebulastone-kabamba-eldarit.html.


Btw, the name Kabamba or Kambaba gives no meaning. Mamba (note spelling) is indeed a malagasy (e.g. a loan-word from bantu) word for crocodile, but the prefix seems strange. Some places are called Bemamba (meaning many crocodiles) , a river is also called Mamba. I have not seen or heard of any placenames like Kabamba, etc.
 
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