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
Tieyaoshan W-Sn deposit, Tengchong Sn belt, Tengchong County, Baoshan, Yunnan, 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 Tieyaoshan W-Sn deposit, Tengchong Sn belt, Tengchong County, Baoshan, Yunnan, China
Data Identifiers
Mindat Occurrence Record ID:869566
Long-form Identifier:1:3:869566:6
GUID (UUID V4):0
Nearest other occurrences of Biotite
13.7km (8.5 miles) ⓘGudong Sn deposit, Tengchong Sn belt, Tengchong County, Baoshan, Yunnan, China
18.2km (11.3 miles) ⓘXiaolonghe Sn deposit, Tengchong Sn belt, Tengchong County, Baoshan, Yunnan, China
22.3km (13.8 miles) ⓘDasongpo Sn deposit, Tengchong Sn belt, Tengchong County, Baoshan, Yunnan, China
26.3km (16.4 miles) ⓘBaihuanao intrusion, Tengchong Sn belt, Tengchong County, Baoshan, Yunnan, China
28.0km (17.4 miles) ⓘLaopingshan Sn deposit, Tengchong Sn belt, Tengchong County, Baoshan, Yunnan, China
34.4km (21.4 miles) ⓘXinqi Sn-W deposit, Tengchong Sn belt, Tengchong County, Baoshan, Yunnan, China
39.4km (24.5 miles) ⓘLailishan Sn deposit, Tengchong Sn belt, Lianghe County, Dehong, Yunnan, China
46.0km (28.6 miles) ⓘDatongchang Sn-Pb-Zn deposit (Dadongchang Sn-Pb-Zn deposit), Tengchong Sn belt, Tengchong County, Baoshan, Yunnan, China
55.0km (34.2 miles) ⓘTuganzhai iREE deposit, Lianghe County, Dehong, Yunnan, China
57.2km (35.5 miles) ⓘTuguanzhai REE deposit, Tengchong County, Baoshan, Yunnan, China
References
Shilu Zhang (1986): Mineral Deposits 5(3), 19-26
Yang, Wu; Chen, Xiaocui (2026) Prospecting Prediction of the Tieyaoshan Tin Deposit Based on Zircon U–Pb Geochronology, Geochemical Data and Tectonic Numerical Simulation. Minerals, 16 (9). doi:10.3390/min16090877
 
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