Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Biotite from
Honghe REE deposit, Gejiu City, Honghe, 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 Honghe REE deposit, Gejiu City, Honghe, Yunnan, China
Data Identifiers
Mindat Occurrence Record ID:1864360
Long-form Identifier:1:3:1864360:6
GUID (UUID V4):0
Nearest other occurrences of Biotite
0.3km (0.2 miles) ⓘLaochang ore field (Laochang Mine), Gejiu Sn-polymetallic ore field, Gejiu City, Honghe, Yunnan, China
1.0km (0.6 miles) ⓘZhuyeshan deposit, Laochang ore field (Laochang Mine), Gejiu Sn-polymetallic ore field, Gejiu City, Honghe, Yunnan, China
4.8km (3.0 miles) ⓘGaosong deposit, Gaosong ore field, Gejiu Sn-polymetallic ore field, Gejiu City, Honghe, Yunnan, China
6.8km (4.3 miles) ⓘKafang ore field, Gejiu Sn-polymetallic ore field, Gejiu City, Honghe, Yunnan, China
8.8km (5.4 miles) ⓘTangziwa deposit, Laochang ore field (Laochang Mine), Gejiu Sn-polymetallic ore field, Gejiu City, Honghe, Yunnan, China
10.1km (6.3 miles) ⓘMalage ore field, Gejiu Sn-polymetallic ore field, Gejiu City, Honghe, Yunnan, China
17.1km (10.6 miles) ⓘSongshujiao ore field, Gejiu Sn-polymetallic ore field, Gejiu City, Honghe, Yunnan, China
22.2km (13.8 miles) ⓘGejiu Sn-polymetallic ore field, Gejiu City, Honghe, Yunnan, China
26.6km (16.5 miles) ⓘPuxiong regolith-hosted REE deposit, Puxiong, Jianshui County, Honghe, Yunnan, China
27.7km (17.2 miles) ⓘLongchahe pluton, Gejiu Sn-polymetallic ore field, Gejiu City, Honghe, Yunnan, China
References
Xie, Mingjun; Wang, Xueqiu; Zhou, Jian; Liu, Yuheng; Wang, Wei; Zhang, Yunxuan (2026) Characteristics and genesis of ion-adsorption REE deposit in Honghe district, Yunnan, China. Ore Geology Reviews, 188. 107058 doi:10.1016/j.oregeorev.2025.107058
 
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