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
Juela Township, Cona Co. (Cuona Co.), Shannan Prefecture (Lhokha Prefecture; Lhoka Prefecture), Tibet, China


Locality type:Township
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 Juela Township, Cona Co. (Cuona Co.), Shannan Prefecture (Lhokha Prefecture; Lhoka Prefecture), Tibet, China
Data Identifiers
Mindat Occurrence Record ID:1702342
Long-form Identifier:1:3:1702342:5
GUID (UUID V4):0
Nearest other occurrences of Biotite
35.3km (21.9 miles) ⓘUnnamed pegmatites, Cuonadong dome, Lhünzê Co. (Longzi Co.), Shannan Prefecture (Lhokha Prefecture; Lhoka Prefecture), Tibet, China
52.3km (32.5 miles) ⓘKangbuzhenri gneissic granite, Qusum Co. (Qusong Co.), Shannan Prefecture (Lhokha Prefecture; Lhoka Prefecture), Tibet, China
71.8km (44.6 miles) ⓘBangbu Au deposit, Gyaca Co. (Jiacha Co.), Shannan Prefecture (Lhokha Prefecture; Lhoka Prefecture), Tibet, China
97.3km (60.4 miles) ⓘLuobusha ophiolite ("Luobusa ophiolite"), Qusum Co. (Qusong Co.), Shannan Prefecture (Lhokha Prefecture; Lhoka Prefecture), Tibet, China
References
Shan, Chunxi, Kang, Zhiqiang, Yang, Feng, Ma, Chengyou, Qiao, Zedong, Liu, Zonghao, Mu, Jizhong, Wu, Lingling, Zhou, Lu (2025) Mafic Intrusions in the Cuona Area, Eastern Tethyan Himalaya: Early Kerguelen Mantle Plume Activity and East Gondwana Rifting. Minerals, 15 (3). doi:10.3390/min15030281
 
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