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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Spreustein from
Bjørkedalsvegen road cut 1, Kjølsrød, Bjørkedalen, Porsgrunn, Telemark, Norway


Locality type:Road Cutting
Classification
Species:Natrolite var: Spreustein
Formula:Na2Al2Si3O10 · 2H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Spreustein data
Locality Data:Click here to view Bjørkedalsvegen road cut 1, Kjølsrød, Bjørkedalen, Porsgrunn, Telemark, Norway
Data Identifiers
Mindat Occurrence Record ID:1729040
Long-form Identifier:1:3:1729040:7
GUID (UUID V4):0
Nearest other occurrences of Spreustein
10.3km (6.4 miles) ⓘHallingsås Quarry, Auenlandet, Porsgrunn, Telemark, Norway
10.6km (6.6 miles) ⓘTorbjørnsås Quarry, Auenlandet, Porsgrunn, Telemark, Norway
11.4km (7.1 miles) ⓘSagåsen Quarry, Sagåsen, Auenlandet, Porsgrunn, Telemark, Norway
11.5km (7.1 miles) ⓘSaga 1 Quarry, Sagåsen, Auenlandet, Porsgrunn, Telemark, Norway
12.4km (7.7 miles) ⓘJohs Nilsens Quarry, Tvedalen, Larvik Commune, Vestfold, Norway
12.5km (7.7 miles) ⓘVevja East Quarry, Tvedalen, Larvik Commune, Vestfold, Norway
12.8km (7.9 miles) ⓘA/S Granit Quarry, Tuften, Tvedalen, Larvik Commune, Vestfold, Norway
13.2km (8.2 miles) ⓘBjørndalen Quarry (Lundhs labrador), Tvedalen, Larvik Commune, Vestfold, Norway
13.9km (8.6 miles) ⓘNorwegian Pearl Quarry, Tvedalen, Larvik Commune, Vestfold, Norway
14.1km (8.7 miles) ⓘNatrolittodden, Vesle Arøya, Larvik Commune, Vestfold, Norway
References
Knut Edvard Larsen observation and collection 15.04.2025Identified by Knut Edvard Larsen: Visual Identification
 
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