Kerrouchen online dating
Having conducted semi-quantitative EDS at SGS Labs, Don found that these are in fact phosphate mineralization, and they are likely a combination of rhabdophane-(La), rhabdophane-(Ce), possibly including monazite-(Ce).
They appear to be pseudomorphs after a REE carbonate, probably in the parisite group, given that this new parisite-(La) has been found at Novo Horizonte in crystals with a similar aspect and appearance, at a similar time.
They could also be after bastnasite-(La), which has been described from the locality. (If you’d like to see what these looked like, they are here.) Mine are all sold, but Carlos Menezes had a few thumbnail-sized specimens of this fascinating material available in Tucson.
For now, I’m labelling them rhabdophane, pseudomorph after parisite, with the proviso that the above is the technically closest identification information to date. Also from Brazil, there has been one I think will be underrated and missed by many collectors.
The work on this material was continued by a group of mineralogists, and in June 2016, the new mineral, parisite-(La), was officially regognized by the IMA. In November 2015, I had a few specimens from this locality on the website, sold to me under the label “synchysite”, and so-labeled on the website.
Subsequent analysis by Don Doell has confirmed more about their identity.
As is the case with all localities, and particularly much of the Mali material (of the various minerals), so much is damaged – the devil is in finding fine, collection-quality specimens.
I worked through a lot of this material and I found a few – they are really nice!
These muscovite crystals from Mantena have nice colour, giving depth and presence.This past year, Daniel Foscarini Almeida conducted significant mining operations in a zone that contained small, sharp crystals.Almost all had small chipping, but I went through hundreds and these best ones are extremely good. Fluorapatite, Ipirá, Bahia, Brazil – 3.2 cm And finally from Brazil (for now), Minas Gerais yielded some very fine phantom quartz crystals this year, from the deposits at Presidente Kubitschek.Grossular, Diabe Sira, Arrondissement Diako, Cercle de Bafoulabé, Kayes Region, Mali – 9.7 cm Further north still, I think we’ve all become a bit spoiled by the constant flow of excellent mineral specimens from Morocco in recent years.So it felt like a bit of a disappointment that there wasn’t a spectacular new find, and that some of the material we’ve seen in recent times is drying up. Marie post last summer, the Sidi Lahcen barites are no more – I love those specimens, and good ones are now already hard to find (and in some cases very expensive).