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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Gypsum from
Dragehullet, Torsberg, Flakvarp, Skien, Telemark, Norway


Locality type:Cave
Classification
Species:Gypsum
Formula:CaSO4 · 2H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Gypsum data
Locality Data:Click here to view Dragehullet, Torsberg, Flakvarp, Skien, Telemark, Norway
Data Identifiers
Mindat Occurrence Record ID:240397
Long-form Identifier:1:3:240397:7
GUID (UUID V4):0
Nearest other occurrences of Gypsum
3.5km (2.2 miles) ⓘTråk (Tråg), Bamble, Telemark, Norway
17.7km (11.0 miles) ⓘTuften, Tvedalen, Larvik Commune, Vestfold, Norway
17.8km (11.0 miles) ⓘMeikjær Mine, Skjilbreia, Bamble Nickel Mines, Bamble, Telemark, Norway
27.7km (17.2 miles) ⓘJahrehagen cottage grounds, Jahren pegmatite, Stavern (Fredriksvärn), Larvik Commune, Vestfold, Norway
50.1km (31.1 miles) ⓘRavneberget Quarry, Søndeled, Risør, Agder, Norway
50.2km (31.2 miles) ⓘJerngruvevannet, Kongsberg, Buskerud, Norway
59.7km (37.1 miles) ⓘGottes Hülfe in der Noth Mine, Overberget Mining Field, Kongsberg, Buskerud, Norway
62.1km (38.6 miles) ⓘSøftestad Iron Mines, Søftestad, Nissedal, Telemark, Norway
62.9km (39.1 miles) ⓘGunhildrud, Øvre Eiker, Buskerud, Norway
69.2km (43.0 miles) ⓘSkarra Farm, Øvre Eiker, Buskerud, Norway
References
Larsen, Alf Olav (1974) Sekundære mineraler fra Porsgrunn. NAGS-NYTT, 1[1974] (2) 13
 
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