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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
Tailu pluton, Maiji District, Tianshui, Gansu, 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 Tailu pluton, Maiji District, Tianshui, Gansu, China
Data Identifiers
Mindat Occurrence Record ID:1650755
Long-form Identifier:1:3:1650755:9
GUID (UUID V4):0
Nearest other occurrences of Biotite
17.9km (11.1 miles) Banpo pluton, Maiji District, Tianshui, Gansu, China
37.2km (23.1 miles) Lizi Au deposit, Qinzhou District, Tianshui, Gansu, China
38.9km (24.2 miles) Liushaogou Au deposit, Hui Co., Longnan, Gansu, China
49.0km (30.5 miles) Huayagou Au deposit, Liangdang Co., Longnan, Gansu, China
50.2km (31.2 miles) Wangdian deposit, Zhangjiachuan Co., Tianshui, Gansu, China
56.3km (35.0 miles) Chenjiamiao Fe-Cu deposit, Zhangjiachuan Co., Tianshui, Gansu, China
72.9km (45.3 miles) Changba Pb-Zn-(Ag) deposit (Changba-Lijiagou Pb-Zn-(Ag) deposit), Cheng County, Longnan, Gansu, China
75.0km (46.6 miles) Qiandongshan Mine (Qiantongshan Mine), Fengxian–Taibai ore cluster, Feng County, Baoji, Shaanxi, China
78.6km (48.8 miles) Yindongxia Gorge, Dasanguan Village, Shennong Town, Weibin District, Baoji, Shaanxi, China
90.1km (56.0 miles) Baguamiao Mine, Fengxian–Taibai ore cluster, Feng County, Baoji, Shaanxi, China
References
 
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