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
Qiangma Mine (Qiangmayu Mine), Lingbao City, Sanmenxia, Henan, 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 Qiangma Mine (Qiangmayu Mine), Lingbao City, Sanmenxia, Henan, China
Data Identifiers
Mindat Occurrence Record ID:1495603
Long-form Identifier:1:3:1495603:4
GUID (UUID V4):0
Nearest other occurrences of Biotite
1.7km (1.0 miles) ⓘYangzhaiyu Au-Pb-Te deposit, Qinling Mine, Lingbao City, Sanmenxia, Henan, China
1.9km (1.2 miles) ⓘJintongcha Au-Ag-Cu deposit, Lingbao City, Sanmenxia, Henan, China
3.6km (2.2 miles) ⓘCangzhuyu Au deposit, Lingbao City, Sanmenxia, Henan, China
5.0km (3.1 miles) ⓘFancha gold deposit, Lingbao City, Sanmenxia, Henan, China
5.2km (3.2 miles) ⓘChen’er Au deposit, Luonan County, Shangluo, Shaanxi, China
5.7km (3.5 miles) ⓘTonggou Au deposit (incl. Chucha-Luanshi Au deposit), Lingbao City, Sanmenxia, Henan, China
5.7km (3.6 miles) ⓘDongchuang Mine, Lingbao City, Sanmenxia, Henan, China
7.3km (4.5 miles) ⓘJinqu Au deposit, Lingbao City, Sanmenxia, Henan, China
8.3km (5.2 miles) ⓘWenyu Mine, Lingbao City, Sanmenxia, Henan, China
8.5km (5.3 miles) ⓘDahu Mine (Dahuyu Mine), Lingbao City, Sanmenxia, Henan, China
References
Ren, Hongyu; Li, Chao; Yan, Qinggao; Jiang, Xiaojun; Zhang, Hao; Zhang, Jihao; Yu, Pengyue; Liu, Zeqi (2025) Genesis of the Boka vein-type Au deposit, Dongchuan, southwestern China: Insights from rutile U–Pb dating and pyrite chemistry. Ore Geology Reviews, 184. 106716 doi:10.1016/j.oregeorev.2025.106716
 
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