Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite
It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
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Magnesio-arfvedsonite from
Phakant Mine, Hpakant (Hpakan; Phakant; Phakan), Hpakant-Tawmaw Jade Tract, Hpakant Township (Hpakan; Phakant; Phakan), Mohnyin District, Kachin State, Myanmar


Locality type:Mine
Classification
Species:Magnesio-arfvedsonite
Formula:NaNa2(Mg4Fe3+)(Si8O22)(OH)2
Comments:A microprobe analysis by Wang et al (2013) corresponds to magnesio-arfvedsonite by using Andrew J. Locock (2014): An Excel spreadsheet to classify chemical analyses of amphiboles following the IMA 2012 recommendations. Computers & Geosciences, Volume 62, pp 1-11 for normalization. The ID depends on the calculated Fe3+/Ftot ratio, and the composition will correspond to eckermannite for low Fe3+.

SiO2- 58.98
TiO2
Al2O3- 0.33
FeO- 6.36
MnO
MgO- 19.47
CaO- 3.13
Na2O- 9.25
K2O- 0.82
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Magnesio-arfvedsonite data
Locality Data:Click here to view Phakant Mine, Hpakant (Hpakan; Phakant; Phakan), Hpakant-Tawmaw Jade Tract, Hpakant Township (Hpakan; Phakant; Phakan), Mohnyin District, Kachin State, Myanmar
Data Identifiers
Mindat Occurrence Record ID:910151
Long-form Identifier:1:3:910151:7
GUID (UUID V4):0
Nearest other occurrences of Magnesio-arfvedsonite
9.4km (5.8 miles) ⓘTawmaw (Tawhmaw; Taw Maw), Hpakant-Tawmaw Jade Tract, Hpakant Township (Hpakan; Phakant; Phakan), Mohnyin District, Kachin State, Myanmar
References
Jing Wang, Guanghai Shi, Jun Wang, Ye Yuan, and Mengchu Yang (2013): Hydrothermal albitite from the Myanmar jadeite deposit. Acta Petrologica Sinica 29(4), 1450-1460 (in Chinese with English abstract).
 
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