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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Siderophyllite from
Søndrestjenn 1 (Skåremyr), Søndrestjenn, Birkenes, Agder, Norway


Locality type:Quarry
Classification
Species:Siderophyllite
Formula:KFe22+Al(Al2Si2O10)(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Siderophyllite data
Locality Data:Click here to view Søndrestjenn 1 (Skåremyr), Søndrestjenn, Birkenes, Agder, Norway
Data Identifiers
Mindat Occurrence Record ID:1254876
Long-form Identifier:1:3:1254876:1
GUID (UUID V4):0
Nearest other occurrences of Siderophyllite
8.3km (5.2 miles) ⓘVaselona (Begervannet 01), Begervannet, Birkenes, Agder, Norway
30.1km (18.7 miles) ⓘLi 02 Feldspar Quarry (Li gruve), Li, Evje og Hornnes, Agder, Norway
69.3km (43.0 miles) ⓘLindvikskollen Quarry, Lindvikskollen-Kalstadgangen pegmatite, Kragerø, Telemark, Norway
69.4km (43.1 miles) ⓘKalstadgangen, Lindvikskollen-Kalstadgangen pegmatite, Kragerø, Telemark, Norway
76.3km (47.4 miles) ⓘHeftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
76.6km (47.6 miles) ⓘHøydalen, Tørdal, Drangedal, Telemark, Norway
79.6km (49.4 miles) ⓘBratterud pegmatite, Tørdal, Drangedal, Telemark, Norway
References
Müller, A., Ihlen, P.M., Kronz, A. (2006): Potential resources of quartz and feldspar raw material in Sørland IV: Relationships between quartz, feldspar and mica chemistry and pegmatite type. NGU report 2005.075, 94 pp
 
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