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
Haigou Mine, Antu County, Yanbian Chaoxianzu, Jilin, China


Locality type:Mine
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 Haigou Mine, Antu County, Yanbian Chaoxianzu, Jilin, China
Data Identifiers
Mindat Occurrence Record ID:1756047
Long-form Identifier:1:3:1756047:6
GUID (UUID V4):0
Nearest other occurrences of Biotite
16.6km (10.3 miles) ⓘSongjianghe Au deposit, Dunhua City, Yanbian Chaoxianzu, Jilin, China
35.5km (22.0 miles) ⓘHuangnihe pluton, Dunhua City, Yanbian Chaoxianzu, Jilin, China
42.2km (26.2 miles) ⓘLiupiyegou Mine, Jiapigou ore field, Huadian City, Jilin, Jilin, China
55.6km (34.5 miles) ⓘSandaocha Mine, Jiapigou ore field, Huadian City, Jilin, Jilin, China
61.0km (37.9 miles) ⓘNaizhigou Au deposit, Jiapigou ore field, Huadian City, Jilin, Jilin, China
61.3km (38.1 miles) ⓘBinghugou Au deposit, Liuhe orefield, Jiapigou ore field, Huadian City, Jilin, Jilin, China
62.5km (38.9 miles) ⓘLaoniugou Fe deposit (Laoniuguo Fe deposit), Huadian City, Jilin, Jilin, China
68.9km (42.8 miles) ⓘBanmiaozi Au deposit, Jiapigou auriferous greenstone belt, Jiapigou ore field, Huadian City, Jilin, Jilin, China
73.3km (45.6 miles) ⓘSandaotong Cu deposit, Huadian City, Jilin, Jilin, China
76.3km (47.4 miles) ⓘChangren Cu-(Co-Ni) deposit, Longjing City, Yanbian Chaoxianzu, Jilin, China
References
Yang, Zhongjie; Zhao, Yuandong; Zhang, Cangjiang; Ren, Chuantao; Yang, Qun; Zhang, Long (2025) Metallogenic Age and Tectonic Setting of the Haigou Gold Deposit in Southeast Jilin Province, NE China: Constraints from Magmatic Chronology and Geochemistry. Minerals, 15 (6). doi:10.3390/min15060582
 
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