Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Quartz from
Romsås Prospect, Oslomarka, Oslo, Norway


Locality type:Prospect
Classification
Species:Quartz
Formula:SiO2
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Data
Mineral Data:Click here to view Quartz data
Locality Data:Click here to view Romsås Prospect, Oslomarka, Oslo, Norway
Data Identifiers
Mindat Occurrence Record ID:760208
Long-form Identifier:1:3:760208:5
GUID (UUID V4):0
Nearest other occurrences of Quartz
0.9km (0.5 miles) ⓘRomsås, Grorud, Oslo, Norway
1.2km (0.8 miles) ⓘHuken Quarry, Grorud, Oslo, Norway
1.5km (0.9 miles) ⓘKristiansen Quarry (Bånkall Quarry), Bånkall, Grorud, Oslo, Norway
2.7km (1.7 miles) ⓘRødtvedt, Grorud, Oslo, Norway
3.0km (1.9 miles) ⓘRingnes brewery, Gjelleråsen, Nittedal, Akershus, Norway
3.4km (2.1 miles) ⓘBjønndalen Quarry, Nittedal, Akershus, Norway
4.0km (2.5 miles) ⓘTonsenplassen, Oslomarka, Oslo, Norway
6.5km (4.1 miles) ⓘSandermosen, Maridalen, Oslomarka, Oslo, Norway
8.8km (5.4 miles) ⓘSandbekken, Løvenstad, Rælingen, Akershus, Norway
8.8km (5.5 miles) ⓘSognsvann Quarry, Oslomarka, Oslo, Norway
References
Berg, H-J 1998
Berg, Hans Jørgen, Oslo, (1998) NHM, Oslo.
 
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