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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Biotite from
Daljeon Intrusion, Yeongdeok County, North Gyeongsang Province, South Korea


Locality type:Intrusion
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Daljeon Intrusion, Yeongdeok County, North Gyeongsang Province, South Korea
Data Identifiers
Mindat Occurrence Record ID:1348162
Long-form Identifier:1:3:1348162:1
GUID (UUID V4):0
Nearest other occurrences of Biotite
45.4km (28.2 miles) ⓘBoam deposit, Wangbi-ri, Uljin County, North Gyeongsang Province, South Korea
45.6km (28.3 miles) ⓘJanggun mine, Bonghwa County, North Gyeongsang Province, South Korea
46.7km (29.0 miles) ⓘOkbang Mine, Punch'on, Uljin County, North Gyeongsang Province, South Korea
61.8km (38.4 miles) ⓘGigye-Gyeongju granite, Gyeongju City, North Gyeongsang Province, South Korea
72.8km (45.3 miles) ⓘKyeongju Namsan, Gyeongju City, North Gyeongsang Province, South Korea
84.8km (52.7 miles) ⓘSangdong Mine, Sangdong-gun, Gangwon Province, South Korea
References
Choi, H. O., Choi, S. H., Lee, D. C., & Kang, H. C. (2013). Geochemical evolution of basaltic volcanism within the tertiary basins of southeastern Korea and the opening of the East Sea (Sea of Japan). Journal of Volcanology and Geothermal Research, 249, 109-122.
 
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