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It's a showdown with rare earth elemental ore Monazite-(Ce) and index mineral Andalusite.
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Biotite from
Rongxuka Li deposit, Yajiang County, Garzê Autonomous Prefecture (Ganzi Autonomous Prefecture), Sichuan, China


Locality type:Deposit
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 Rongxuka Li deposit, Yajiang County, Garzê Autonomous Prefecture (Ganzi Autonomous Prefecture), Sichuan, China
Data Identifiers
Mindat Occurrence Record ID:1986360
Long-form Identifier:1:3:1986360:5
GUID (UUID V4):0
Nearest other occurrences of Biotite
15.0km (9.3 miles) ⓘMurong pegmatite-type Li deposit, Yajiang County, Garzê Autonomous Prefecture (Ganzi Autonomous Prefecture), Sichuan, China
19.1km (11.9 miles) ⓘJiajika Mine, Kangding pegmatite field, Yajiang County, Garzê Autonomous Prefecture (Ganzi Autonomous Prefecture), Sichuan, China
64.9km (40.3 miles) ⓘZhengziyanwo ore block, Yangliuping Cu-Ni-PGE deposit, Yangliuping Cu-Ni-PGE ore field, Danba Co., Garzê Autonomous Prefecture (Ganzi Autonomous Prefecture), Sichuan, China
69.0km (42.9 miles) ⓘDulanggou Au deposit, Xintaizi Au ore field, Danba Co., Garzê Autonomous Prefecture (Ganzi Autonomous Prefecture), Sichuan, China
References
Xuemin, Liu; Jiale, Qian; Yuanliang, Yang; Dabin, Yue; Guozhi, Wang; Fufeng, Zhao; Xingjian, Liao (2026) Geochemistry and geochronology of columbite-group minerals and cassiterite from the pegmatites in the Rongxuka dome, western Sichuan, China. Ore Geology Reviews, 196. p.107489. doi:10.1016/j.oregeorev.2026.107489
 
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