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
Yangyugou carbonatite, Song County, Luoyang, Henan, 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 Yangyugou carbonatite, Song County, Luoyang, Henan, China
Data Identifiers
Mindat Occurrence Record ID:1966146
Long-form Identifier:1:3:1966146:9
GUID (UUID V4):0
Nearest other occurrences of Biotite
15.0km (9.3 miles) ⓘDonggou Mo deposit, Ruyang County, Luoyang, Henan, China
32.7km (20.3 miles) ⓘQiyugou Mine, Qiyugou ore field, Song County, Luoyang, Henan, China
33.2km (20.7 miles) ⓘGongyu Au deposit, Qiyugou ore field, Song County, Luoyang, Henan, China
34.1km (21.2 miles) ⓘLeimengou Mo-Au deposit, Qiyugou ore field, Song County, Luoyang, Henan, China
34.1km (21.2 miles) ⓘHuaishuping Au deposit, Dongwan gold field, Song County, Luoyang, Henan, China
34.8km (21.6 miles) ⓘYuchiling Mo Mine, Song County, Luoyang, Henan, China
37.8km (23.5 miles) ⓘHuangshui'an Mo-(Pb) deposit, Song County, Luoyang, Henan, China
39.0km (24.2 miles) ⓘMiaoling Au deposit, Dongwan gold field, Song County, Luoyang, Henan, China
44.8km (27.9 miles) ⓘShapoling polymetallic deposit, Luoning County, Luoyang, Henan, China
48.3km (30.0 miles) ⓘMarble outcrop, Lushan County, Pingdingshan, Henan, China
References
Moftah, Ahmed S.; Wang, Fangyue; Ni, Chen; Duan, Liuan; Zhang, Long; Zhou, Taofa; Fan, Yu (2026) Multi-stage magmatic evolution and genetic model of carbonatite and syenite in the Yangyugou Complex, Central China: Insights from U–Pb geochronology and Nd isotopes. Ore Geology Reviews, 195. p.107376. doi:10.1016/j.oregeorev.2026.107376
 
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