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Improving Mindat.orghttp://www.mindat.org/photo-153565.html

16th Nov 2014 10:42 UTCVik Vanrusselt Expert

Hello all,


the caption for the image http://www.mindat.org/photo-153565.html

says it's "Shattuckite after Cuprite", while it probably should be "Plancheite after Cuprite" (since it's in the Plancheite gallery for the locality)


Vik

16th Nov 2014 13:36 UTCPaul De Bondt Manager

Hi Vik,


Thank you for reporting this.


Changed.


Take care and best regards.


Paul.

17th Nov 2014 02:26 UTCRock Currier Expert

I think that originally some, perhaps many of the specimens from Katanga that were called plancheite, are really shattuckite. Recently the Tantara mine has been producing some fine examples.

17th Nov 2014 17:23 UTCPaul De Bondt Manager

Hi Rock,


Thank you for the reply.

The fact is that most of the plancheite-shattuckite specimens were identified on sight.

The light colored pieces and plumose varieties were called plancheite and the more solid dark-ones shattuckite.

I am almost sure nobody ever checked this or perhaps in the 50's.

Some even point the fact that shattuckite is extremely rare in Katanga.

I can assure you that the old calcite pseudomorphs are plancheite, see the MR on this subject.

It is true that the recent specimens are different in habit than the old-ones and that they are darker too. But who tested these ?

Katanga did not reveal all his secrets yet.


I hope this helps.


Take care and best regards.


Paul.

18th Nov 2014 22:06 UTCRock Currier Expert

Hello Paul,

We recently received a shipment of a couple of hundered small plancheite-shattuckite specimens from Katanga. They were all light in color but I had them tested anyway and the x-ray from John Attard came back as shattuckite. There were a number of larger and much fancier specimens of the same material at the recent Denver show in the hands of some of the high end dealers also labeled as shattuckite so that I have reason to believe that other analysis than mine had been done. That is the reason that I suspect that many of the old specimens might not be what they were labeled.
 
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