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Improving Mindat.orgFluor-cannilloite

1st Oct 2010 19:11 UTCOlav Revheim Manager

The following information on fluor-cannilloite are given on the location page of Yuang Yang, China

"For instance, this place was given as the locality for a find of emerald-green fluor-cannilloites (?). These specimens actually come from Luc Yen (http://www.mindat.org/loc-6947.html), in the bordering Yenbai Province of Vietnam."

For the fluor-cannilloite photos 54008, 115671 and 337274 , Yuang Yang is given as the locality.

In addition, for photo 54008, the matrix is listed as quartz. The matrix is obviuosly marble.

Can this be fixed?

best regards

Olav

1st Oct 2010 20:07 UTCUwe Kolitsch Manager

Thanks, fixed. Unfortunately, the software doesn't allow (yet) to prohibit adding photos to "fake" localities.

1st Oct 2010 22:37 UTCRob Woodside 🌟 Manager

To add to the problem, the nice emerald green amphibole from Luc Yen is pargasite. Fluor-cannilloite is very very rare and according to Dudley Blauwet is inconspicuous. I've been meaning to go after these, but haven't yet gotten to it. Like all amphiboles they need high end analysis for confirmation. People posting Amphibole photos should not use a species name unless the specimen is analysed or it is known that only one species occurs at that that locality. Without this they should be posted as "unanalysed".

4th Oct 2010 15:07 UTCOlav Revheim Manager

I have been in contact with Dr.Mag Christoph Hauzenberger, and Adrian Pesudo regarding this matter. Both of them have anlysed the green amphibole from Luc Yen and can positively confirm that they are pargasite. Dr. Mag. Hauzenberger has also has sent me the single crystal X-ray data to confirm this.

I think it should be safe to move all the green Luc Yen amphiboles to the pargasite gallery.

Olav

4th Oct 2010 18:16 UTCRob Woodside 🌟 Manager

Thanks Olav. Messages sent.

4th Oct 2010 18:18 UTCAnatoly Kasatkin

I did several quantitative EDS-analyses on Luc Yen material and it is definitely Pargasite. So far Pargas remains the only locality for fluor-cannilloite where it can be correctly IDed by quantitative EDS (or WDS) and SXRD combination. SXRD only is not efficient enough to differ between Fluor-cannilloite and Ca-rich pargasite (unit cell parameters are close - see F.Hawthorne et al.(1996) - AmMin, Vol.81, pp.995-1002)

4th Oct 2010 20:43 UTCPeter Kohorst

Picture 54008 is from me. I have buyed this piece with the marking "Quarz" (matrix) an with this chinese location from Kristalldruse (Lapis), - properly serious (?) - Munich in 12 /2002.

If it is now Pargasite and not Fluor-Canniloite, why can I see it further then under Fluor-Canniloite (54008 and so on)?

Best Regards

Peter

6th Oct 2010 13:40 UTCKnut Edvard Larsen 🌟 Manager

Messages has been sent about the 3 photos of fluor-cannilloite from Luc Yen.

12th Oct 2010 22:04 UTCOlav Revheim Manager

Pargasite

Lục Yên District, Yên Bái Province, Vietnam

should not this be moved as well?

Olav

13th Oct 2010 19:35 UTCUwe Kolitsch Manager

All remaining photos changed.

31st Dec 2011 05:24 UTCCW Rose

I love you guys!

I have been waiting for several years now to list two Paragasite-Spinel specimens which I purchased in Singapore over 6 years ago...not knowing if the Fluor-Canniloite label that came with it was legit...until I found your thread!

Thanks so much for all your hard work and good science to keep localities and solid-solution series minerals well-defined!

25th Dec 2012 13:59 UTCVik Vanrusselt Expert

Hello all,

I recently bought a specimen of "Edenite & Ruby on white marble" from An Phu, Luc Yen.

It had come from a larger piece (which I have seen personally) which had (according to the seller anyway) Pargasite on one side and Edenite on the other.

The seller told me he had had the piece analysed, but did not mention the methods of analysis.

Can anyone confirm if there is any Edenite at An Phu or should I rename it Pargasite?

http://www.palagems.com/gemstones_in_vietnam.htm states that Edenite is apparently present at An Phu & Luc Yen

Thanks,

Vik

25th Dec 2012 19:14 UTCOlav Revheim Manager

Vik,

Edenite is present in the Luc Yen marbles,

"Virginie Garnier, Gaston Giuliani, Daniel Ohnenstetter, Anthony E. Fallick, Jean Dubessy, David Banks, Hoàng Quang Vinh, Thérèse Lhomme, Henri Maluski, Arnaud Pêcher, Kausar Allah Bakhsh, Pham Van Long, Phan Trong Trinh and Dietmar Schwarz (2008): Marble-hosted ruby deposits from Central and Southeast Asia: Towards a new genetic model, Ore Geology Reviews 34 (2008) 169–191" provides microprobe analysis of amphiboles from Luc Yen corresponding to an edenite composition.

It does however appear that pargasite is the more common amphibole in these marbles. There are no way to reliably distinguish between edenite and pargasite from these marbles except by analysis.

It would be interesting if you could get hold of the analytical data and method.

:-)

Olav

25th Dec 2012 23:09 UTCRalph S Bottrill 🌟 Manager

Edenite and parasite are very close in composition and you would need careful micro probe analyses, and I would not be surprised to find both compositions within one crystal.

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