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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Feldspar Group from
Chão do Castanheiro, Cubos-Mesquitela-Mangualde area, Mangualde (Mesquitela e Cunha Alta), Mangualde, Viseu, Portugal


Locality type:Mine
Classification
Species:'Feldspar Group' (not an IMA approved species)
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Data
Mineral Data:Click here to view Feldspar Group data
Locality Data:Click here to view Chão do Castanheiro, Cubos-Mesquitela-Mangualde area, Mangualde (Mesquitela e Cunha Alta), Mangualde, Viseu, Portugal
Data Identifiers
Mindat Occurrence Record ID:844053
Long-form Identifier:1:3:844053:2
GUID (UUID V4):0
Nearest other occurrences of Feldspar Group
0.1km (0.1 miles) ⓘRochel, Cubos-Mesquitela-Mangualde area, Mangualde (Mesquitela e Cunha Alta), Mangualde, Viseu, Portugal
0.1km (0.1 miles) ⓘCabeço do Seixo, Cubos-Mesquitela-Mangualde area, Mangualde (Mesquitela e Cunha Alta), Mangualde, Viseu, Portugal
3.9km (2.4 miles) ⓘUnnamed pegmatite, São Cosmado, Mangualde (Mesquitela e Cunha Alta), Mangualde, Viseu, Portugal
4.4km (2.7 miles) ⓘRegada, Cubos-Mesquitela-Mangualde area, Mangualde (Mesquitela e Cunha Alta), Mangualde, Viseu, Portugal
5.1km (3.2 miles) ⓘSeixinho Mine, Santiago de Cassurrães e Póvoa de Cervães, Mangualde, Viseu, Portugal
5.4km (3.4 miles) ⓘSeixinho Mine - Cunha Alta, Cubos-Mesquitela-Mangualde area, Mangualde (Mesquitela e Cunha Alta), Mangualde, Viseu, Portugal
6.3km (3.9 miles) ⓘPedrouços Mine, Fornos de Maceira Dão, Mangualde, Viseu, Portugal
7.9km (4.9 miles) ⓘReal quarry, Real, Penalva do Castelo, Viseu, Portugal
9.7km (6.0 miles) ⓘCorvaceira quarry, Corvaceira, Tavares (Chãs; Várzea e Travanca), Mangualde, Viseu, Portugal
12.3km (7.6 miles) ⓘParanhos Mining Field, Paranhos, Seia, Guarda, Portugal
References
Nunes, Rui (n.d.) Personal communication.
Grey, Ian E.; Rewitzer, Christian; Hochleitner, Rupert; Kampf, Anthony R.; Boer, Stephanie; Mumme, William G.; Wilson, Nicholas C. (2024) Macraeite, [(H2O)K]Mn2(Fe2Ti)(PO4)4[O(OH)](H2O)10  ⋅  4H2O, a new monoclinic paulkerrite-group mineral, from the Cubos–Mesquitela–Mangualde pegmatite, Portugal. European Journal of Mineralogy, 36 (2). 267-278 doi:10.5194/ejm-36-267-2024
 
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