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
Huangnihe pluton, Dunhua City, Yanbian Chaoxianzu, Jilin, China


Locality type:Pluton
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 Huangnihe pluton, Dunhua City, Yanbian Chaoxianzu, Jilin, China
Data Identifiers
Mindat Occurrence Record ID:1801502
Long-form Identifier:1:3:1801502:5
GUID (UUID V4):0
Nearest other occurrences of Biotite
20.7km (12.9 miles) ⓘSongjianghe Au deposit, Dunhua City, Yanbian Chaoxianzu, Jilin, China
22.4km (13.9 miles) ⓘSandaocha Mine, Jiapigou ore field, Huadian City, Jilin, Jilin, China
22.5km (14.0 miles) ⓘLiupiyegou Mine, Jiapigou ore field, Huadian City, Jilin, Jilin, China
27.7km (17.2 miles) ⓘLaoniugou Fe deposit (Laoniuguo Fe deposit), Huadian City, Jilin, Jilin, China
34.4km (21.4 miles) ⓘBanmiaozi Au deposit, Jiapigou auriferous greenstone belt, Jiapigou ore field, Huadian City, Jilin, Jilin, China
35.5km (22.0 miles) ⓘHaigou Mine, Antu County, Yanbian Chaoxianzu, Jilin, China
39.0km (24.2 miles) ⓘBinghugou Au deposit, Liuhe orefield, Jiapigou ore field, Huadian City, Jilin, Jilin, China
41.3km (25.7 miles) ⓘNaizhigou Au deposit, Jiapigou ore field, Huadian City, Jilin, Jilin, China
42.3km (26.3 miles) ⓘSandaotong Cu deposit, Huadian City, Jilin, Jilin, China
50.2km (31.2 miles) ⓘErdaodianzi Au-(Ag-Cu) deposit, Huadian City, Jilin, Jilin, China
References
Han, Jilong; Lü, Zhicheng; Liu, Yanpeng; Qin, Xuliang; Zhang, Xiaotian; Huang, Pengfei; Zhang, Xinwen; Wang, Shu; Zhao, Chuntao; Sun, Jinggui (2025) Petrogenesis and Geodynamics of the Huangnihe Pluton in the Jiapigou Mining District of Northeast China: Constraints from Zircon U–Pb and Lu–Hf Isotopes. Minerals, 15 (10). doi:10.3390/min15101014
 
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