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Luc Yen, Yenbai Province (Yen Bai Province), Vietnam
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Spinel
Luc Yen, Yenbai Province, Vietnam

Photo: Rob Lavinsky
 
 
The recent finds of fluor-cannilloite from "Yuang Yang (Yueng Yang), Wenshan, Yunnan Province, China" are really from this locality.
Yuang Yang is in fact a small city in Yunnan Province where mineral dealers frequently offer Vietnamese specimens.

There are numerous quarries spread along a 12 km line in this area, all generally labelled "Luc Yen", although some should probably be renamed.

NOTE: All of the analysed 'fluor-cannilloites' are pargasite (see http://www.mindat.org/mesg-106-259756.html, http://www.mindat.org/mesg-7-69925.html and http://www.mindat.org/mesg-7-198029.html). Hauzenberger et al. (2005) report intense green pargasite in association with red spinel from Luc Yen. This pargasite has been confirmed by EPMA and single-crystal XRD.

Mineral List

Mineral list contains entries from the region specified including sub-localities
Albite
var: Cleavelandite

'Apatite'
'Biotite'
Calcite
'Chlorite Group'
Chondrodite
Corundum
var: Ruby
var: Sapphire
Danburite
Dravite
Edenite
Elbaite
Fluor-cannilloite
Graphite
Humite
'Humite Group'
Lepidolite
Margarite
Microcline
Microcline
var: Amazonite

Muscovite
'Olivine'
Orthoclase
Paragonite
Pargasite
Phlogopite
Pyrite
Pyrrhotite
Quartz
Quartz
var: Smoky Quartz

Rossmanite
Rutile
Schorl
Spinel
Titanite
'Tourmaline'
'Unnamed (Pb-dominant Tourmaline)'


49 entries listed. 25 valid minerals. 1 erroneous literature entry.

Localities in this Region

Vietnam
Vietnam

The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Hauzenberger, Ch.A., Walter, F., Hofmeister, W., Phan Tien, D. & Kienzl, N. (2005): Mineralogical, petrological and crystallographic investigations of two amphiboles from ruby and spinel bearing marbles, Luc Yen, Province Yen Bai, Vietnam. In: Hofmeister, W. et al. (ed): Proceedings of the third international workschop on gem-materials and modern analytical methods. Hanoi, Vietnam. 3-8.

Eugeni Bareche (2007) An Phu, Luc Yen, Vietnam. Revista de Minerales (Barcelona), 2007/2, 26-29.

Tamagnini, F. (2007). Tormaline policrome in Vietnam. Un nuovo ritrovamento nei pressi di Luc Yen. Rivista Mineralogica Italiana, 31 (2), 104-107.

Garnier, V., Giuliani, G., Ohnenstetter, D., Fallick, A.E., Dubessy, J., Banks, D., Vinh, H.Q., Lhomme, T., Maluski, H., Pêcher, A., Bakhsh, K.A., Long, P.V., Trinh, P.T., and Schwarz, D. (2008): Marble-hosted ruby deposits from Central and Southeast Asia: Towards a new genetic model. Ore Geology Reviews 34, 169-191.

Patureau, J. (2011): Un minéralogiste et collectionneur francais á Luc Yen, Vietnam. La Régne Minéral.99, 39-48

Pham Van Long, Vincent Pardieu, and Gaston Giuliani (2013): Update on Gemstone Mining in Luc Yen, Vietnam. Gems & Gemology 49, 233-245.

External Links


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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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