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Pargasite from
Luc Yen, Yenbai Province (Yen Bai Province), Vietnam

Description
Comments:	Intense green crystals up to 5 cm large in association with red spinel in calcite-dolomite marble (Hauzenberger et al., 2005). Ca = 1.97 apfu, Na+K = 0.72 apfu, F = 0.54 apfu. Full composition: Si 6.34 Ti 0.03 Al 2.38 Cr 0.04 Fe < 0.01 Mn < 0.01 Mg 4.25 Ca 1.97 Na 0.66 K 0.06 ------- F 0.54 Cl < 0.01
Quality of samples:	not specified / average specimens
Confirmation
Validity:	Confirmed
Confirmation Methods:	XRD EPMA
References
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; http://www.mindat.org/mesg-7-69925.html
Data
Mineral Data:	Click here to view Pargasite data
Locality Data:	Click here to view Luc Yen, Yenbai Province (Yen Bai Province), Vietnam
Photo Gallery	View Gallery (41 photos)

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