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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Columbite-Tantalite from
Dragbacken, Ostrobothnia, Finland


Locality type:Pegmatite
Classification
Species:'Columbite-Tantalite' (not an IMA approved species)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Columbite-Tantalite data
Locality Data:Click here to view Dragbacken, Ostrobothnia, Finland
Data Identifiers
Mindat Occurrence Record ID:1808609
Long-form Identifier:1:3:1808609:6
GUID (UUID V4):0
Nearest other occurrences of Columbite-Tantalite
17.7km (11.0 miles) ⓘSyväjärvi, Seinäjoki, South Ostrobothnia, Finland
19.8km (12.3 miles) ⓘRapasaaret, Kaustinen, Central Ostrobothnia, Finland
References
Lynch, Edward P.; Szentpéteri, Krisztián; Andersson, Joel B.H.; Kuusela, Janne; Sadeghi, Martiya; Bauer, Tobias E. (2025) Lithium-caesium-tantalum (LCT) pegmatite mineralization in the Paleoproterozoic central Fennoscandian Shield (Sweden and Finland): A review of geological characteristics and assessment of mineral system commonalities. Ore Geology Reviews, 184. 106739 doi:10.1016/j.oregeorev.2025.106739
 
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