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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Tourmaline from
Vestre Kjørstad 1 Quarry, Kjørstad, Bamble, Telemark, Norway


Locality type:Quarry
Classification
Species:'Tourmaline' (not an IMA approved species)
Formula:AD3G6(T6O18)(BO3)3X3Z
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Tourmaline data
Locality Data:Click here to view Vestre Kjørstad 1 Quarry, Kjørstad, Bamble, Telemark, Norway
Data Identifiers
Mindat Occurrence Record ID:650486
Long-form Identifier:1:3:650486:1
GUID (UUID V4):0
Nearest other occurrences of Tourmaline
0.8km (0.5 miles) ⓘØstre Kjørstad Quarry, Kjørstad, Bamble, Telemark, Norway
1.4km (0.8 miles) ⓘTrosby pegmatites, Trosby, Bamble, Telemark, Norway
2.1km (1.3 miles) ⓘØdegården apatite mines, Bamble, Telemark, Norway
2.8km (1.7 miles) ⓘBreisand Quarry, Bamble, Telemark, Norway
2.8km (1.8 miles) ⓘHafsund Quarry, Hafsund islands, Bamble, Telemark, Norway
3.0km (1.8 miles) ⓘDanholmen quarry, Bamble, Telemark, Norway
3.3km (2.1 miles) ⓘIsnes I Quarry, Bamble, Telemark, Norway
3.7km (2.3 miles) ⓘVågøy pegmatite, Vågøy, Bamble, Telemark, Norway
5.4km (3.4 miles) ⓘBrekke, Bamble, Telemark, Norway
9.3km (5.8 miles) ⓘGjerset pegmatite quarry, Bamble, Telemark, Norway
References
Andersen, Olaf (1931) Feltspat II. Forekomster i fylkene Buskerud og Telemark, i flere herreder i Aust-Agder og i Hidra i Vest-Agder [Feldspar II. Occurrences in the counties of Buskerud and Telemark, in several counties in Aust-Agder and in Hidra in Vest-Agder], in Feltspat II. Feltspat III. Norges Geologiske Undersøkelse 128b, 1-109 p.13
Larsen, Alf Olav (2025) Pegmatittbrudd i Telemark [Pegmatite quarries in Telemark]. Alf Olav Larsen. p.1-212.pp.25-26
 
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