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
Dongzhongla Pb-Zn deposit, Gongbo'gyamda Co. (Gongbujiangda Co.), Nyingtri Prefecture (Linzhi Prefecture), 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 Dongzhongla Pb-Zn deposit, Gongbo'gyamda Co. (Gongbujiangda Co.), Nyingtri Prefecture (Linzhi Prefecture), Tibet, China
Data Identifiers
Mindat Occurrence Record ID:1900941
Long-form Identifier:1:3:1900941:0
GUID (UUID V4):0
Nearest other occurrences of Biotite
36.4km (22.6 miles) ⓘTangbula Mo-(Cu) deposit, Gongbo'gyamda Co. (Gongbujiangda Co.), Nyingtri Prefecture (Linzhi Prefecture), Tibet, China
42.8km (26.6 miles) ⓘYaguila Pb-Zn-Mo deposit, Gongbo'gyamda Co. (Gongbujiangda Co.), Nyingtri Prefecture (Linzhi Prefecture), Tibet, China
46.5km (28.9 miles) ⓘSharang Mo deposit, Gongbo'gyamda Co. (Gongbujiangda Co.), Nyingtri Prefecture (Linzhi Prefecture), Tibet, China
78.7km (48.9 miles) ⓘDemingding Mo-Cu deposit, Gyaca Co. (Jiacha Co.), Shannan Prefecture (Lhokha Prefecture; Lhoka Prefecture), Tibet, China
References
Yu, Zezhang; Chen, Xin; Zhang, Yong; Zheng, Shunli; Wang, Xiaoyi; Gao, Shunbao; Zheng, Youye; Gong, Fuzhi (2026) Age, alteration, and mineralization of fault-controlled distal skarn Pb-Zn deposit: Example from Dongzhongla deposit of eastern Gangdese-Nyainqêntanglha belt, Xizang. Ore Geology Reviews, 190. 107165 doi:10.1016/j.oregeorev.2026.107165
 
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