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
Yindonggou Mine (Yindonggou deposit), Zhushan Co., Shiyan, Hubei, 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 Yindonggou Mine (Yindonggou deposit), Zhushan Co., Shiyan, Hubei, China
Data Identifiers
Mindat Occurrence Record ID:744297
Long-form Identifier:1:3:744297:1
GUID (UUID V4):0
Nearest other occurrences of Biotite
16.5km (10.3 miles) ⓘMiaoya carbonatite, Zhushan Co., Shiyan, Hubei, China
49.4km (30.7 miles) ⓘShaxiongdong carbonatite, Shennongjia Forest District, Shiyan, Hubei, China
62.6km (38.9 miles) ⓘTianbao Nb(-REE) deposit, Zhuxi Co., Shiyan, Hubei, China
86.7km (53.9 miles) ⓘJinlongshan Au-Sb deposit, Jinlongshan Au ore field, Zhen'an County, Shangluo, Shaanxi, China
92.4km (57.4 miles) ⓘShiliping Sb deposit, Shangnan County, Shangluo, Shaanxi, China
References
Shihe Lei, Guiying Tang, Zhengyong Qin, Zicai Zhang, and Bo Liu (1998): Geology and Prospecting 34(4), 13-19
 
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