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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Fersmite from
Saima U-REE deposit, Kuandian County, Dandong, Liaoning, China


Locality type:Deposit
Classification
Species:Fersmite
Formula:CaNb2O6
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Fersmite data
Locality Data:Click here to view Saima U-REE deposit, Kuandian County, Dandong, Liaoning, China
Data Identifiers
Mindat Occurrence Record ID:1603679
Long-form Identifier:1:3:1603679:6
GUID (UUID V4):0
References
Wu, Yue, Ju, Nan, Liu, Xin, Shi, Lu, Feng, Yuhui, Ma, Danzhen (2023) Sources of Metallogenic Materials of the Saima Alkaline Rock-Hosted Niobium–Tantalum Deposit in the Liaoning Region: Evidence from the Sr-Nd-Pb and Li Isotopes. Minerals, 13 (11) doi:10.3390/min13111443
Ju, Nan; Liu, Bo; Gong, Yanan; Qiu, Kunfeng; Wu, Yue; Liu, Xin; Shi, Lu; Nan, Zhe; Ma, Danzhen; Wang, Haoheng; et al. (2025) Apatite U-Pb ages, trace elements, and in situ Sr-Nd isotopes and pyrite S isotopes of the Saima alkaline complex: Implications for the petrogenesis and tectonic setting of Nb-Ta-REE mineralization in Northeast China. Ore Geology Reviews, 183. 106704 doi:10.1016/j.oregeorev.2025.106704
 
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