Vote for your favorite mineral in #MinCup26! - Hafnon vs. Putnisite
It's a pair of tiny minerals of unusual chemistry as orange Hafnon battles with purple Putnisite.
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Dolomite from
Frasassi Caves (Grotte di Frasassi; Fiume-Vento karst system; Grotta del Fiume-Grotta Grande del Vento karst complex; Grotta Grande del Vento), Genga, Ancona Province, Marche, Italy


Locality type:Cave
Classification
Species:Dolomite
Formula:CaMg(CO3)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Dolomite data
Locality Data:Click here to view Frasassi Caves (Grotte di Frasassi; Fiume-Vento karst system; Grotta del Fiume-Grotta Grande del Vento karst complex; Grotta Grande del Vento), Genga, Ancona Province, Marche, Italy
Data Identifiers
Mindat Occurrence Record ID:1854218
Long-form Identifier:1:3:1854218:5
GUID (UUID V4):0
References
Galdenzi, Sandro (2025) Geological Map of the Frasassi Gorge (Northern Apennines, Italy). Geosciences, 15 (12). doi:10.3390/geosciences15120454
 
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