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
Bairong Cu-Mo deposit, Nyêmo Co. (Nimu Co.), Lhasa, Tibet, 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 Bairong Cu-Mo deposit, Nyêmo Co. (Nimu Co.), Lhasa, Tibet, China
Data Identifiers
Mindat Occurrence Record ID:437157
Long-form Identifier:1:3:437157:1
GUID (UUID V4):0
Nearest other occurrences of Biotite
8.2km (5.1 miles) ⓘChongjiang Cu-(Mo-Au) deposit, Nyêmo Co. (Nimu Co.), Lhasa, Tibet, China
13.5km (8.4 miles) ⓘTinggong Cu-Mo deposit (Tingguan Cu-Mo deposit), Nyêmo Co. (Nimu Co.), Lhasa, Tibet, China
14.1km (8.7 miles) ⓘGangjiang Cu-Mo deposit, Nyêmo Co. (Nimu Co.), Lhasa, Tibet, China
39.9km (24.8 miles) ⓘNianzha deposit, Rinbung Co. (Renbu Co.), Xigazê Prefecture (Rikaze Prefecture; Shigatse Prefecture), Tibet, China
49.9km (31.0 miles) ⓘPusangguo deposit, Namling Co. (Nanmulin Co.), Xigazê Prefecture (Rikaze Prefecture; Shigatse Prefecture), Tibet, China
59.9km (37.2 miles) ⓘLiangguo corundum deposit, Qüxü Co. (Qushui Co.), Lhasa, Tibet, China
94.2km (58.5 miles) ⓘNanmu Cu-(Mo) deposit, Qüxü Co. (Qushui Co.), Lhasa, Tibet, China
98.2km (61.0 miles) ⓘRongnido, Damxung Co. (Dangxiong Co.), Lhasa, Tibet, China
99.3km (61.7 miles) ⓘJiru Cu deposit, Namling Co. (Nanmulin Co.), Xigazê Prefecture (Rikaze Prefecture; Shigatse Prefecture), Tibet, China
References
www.ccgoldfields.com (n.d.) http://www.ccgoldfields.com/admin/Latest/Docs/News%20release%20Nimu%209%20October%202006.pdf
Chen, X., Zhang, L., Wang, X., Zou, S., Li, K., Zhu, Z. J., & Leng, C. B. (2022). Volatile evolution of magmas associated with the Bairong deposit, Tibet, and implications for porphyry Cu-Mo mineralization. Ore Geology Reviews, 105201.
Xu, Zhongbiao; Li, Wenchang; Yang, Fucheng; Jiang, Hua; Wang, Xiaoyu; Li, Sheng (2025) Origin and geodynamic setting of adakitic intrusions in the Bairong porphyry Cu–Mo deposit, central Gangdese Belt, Tibet. Ore Geology Reviews, 186. 106867 doi:10.1016/j.oregeorev.2025.106867
 
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