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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Pyroxene Group from
Ertelien Mine, Ertelien Mines, Holleia, Ringerike Ni Mines, Ringerike, Buskerud, Norway


Locality type:Mine
Classification
Species:'Pyroxene Group' (not an IMA approved species)
Formula:ADSi2O6
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Pyroxene Group data
Locality Data:Click here to view Ertelien Mine, Ertelien Mines, Holleia, Ringerike Ni Mines, Ringerike, Buskerud, Norway
Data Identifiers
Mindat Occurrence Record ID:1834055
Long-form Identifier:1:3:1834055:0
GUID (UUID V4):0
Nearest other occurrences of Pyroxene Group
11.7km (7.2 miles) ⓘHvalsknatten, Modum, Buskerud, Norway
13.9km (8.6 miles) ⓘGulstøveren Mine, Holleia, Ringerike Ni Mines, Ringerike, Buskerud, Norway
21.3km (13.2 miles) ⓘGlomsrudkollen Zinc Mines, Åmot, Modum, Buskerud, Norway
29.6km (18.4 miles) ⓘSteinshøgda, Lommedalen, Bærum (Baerum), Akershus, Norway
40.9km (25.4 miles) ⓘSåsen Mine, Besseberg Mines, Krambudalen, Øvre Eiker, Buskerud, Norway
41.8km (26.0 miles) ⓘNyseter Zinc Mines, Grua mining district, Lunner, Akershus, Norway
46.4km (28.9 miles) ⓘKongens Mine, Elsjøkongen, Elsjø Mining Field, Nannestad, Akershus, Norway
47.0km (29.2 miles) ⓘErdmann Mine, Engelstadvangen, Elsjø Mining Field, Nannestad, Akershus, Norway
47.5km (29.5 miles) ⓘRien Mine, Rien, Sande, Holmestrand, Vestfold, Norway
47.5km (29.5 miles) ⓘGruveliastollen (Gruvelia Adit), Elsjø Mining Field, Nannestad, Akershus, Norway
References
Mansur, E.; Orvik, A. A.; Henderson, I.; Miranda, A. C.; Slagstad, T.; Dare, S.; Bjerkgaard, T.; Sandstad, J. S. (2025) Formation of the Ertelien and Langedalen magmatic Ni–Cu sulfide deposits in Norway: investigating the evolution of platinum-group-element-depleted systems at convergent margins. European Journal of Mineralogy, 37 (6). 841-869 doi:10.5194/ejm-37-841-2025
 
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