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
Gulsen, Sankt Marein-Feistritz, Murtal District, Styria, Austria


Locality type:Quarry
Classification
Species:'Tourmaline' (not an IMA approved species)
Formula:AD3G6(T6O18)(BO3)3X3Z
Confirmation
Validity:Confirmed
Confirmation Methods:Polarised-light microscopy
Data
Mineral Data:Click here to view Tourmaline data
Locality Data:Click here to view Gulsen, Sankt Marein-Feistritz, Murtal District, Styria, Austria
Data Identifiers
Mindat Occurrence Record ID:774355
Long-form Identifier:1:3:774355:9
GUID (UUID V4):0
Nearest other occurrences of Tourmaline
13.9km (8.6 miles) ⓘRailway tunnel, Galgenberg, Leoben, Leoben District, Styria, Austria
18.2km (11.3 miles) ⓘLeucophyllite mine, Kothgraben (Kotgraben), Kleinfeistritz, Weißkirchen in Steiermark, Murtal District, Styria, Austria
18.3km (11.4 miles) ⓘKatzbachgraben, Salla, Maria Lankowitz, Voitsberg District, Styria, Austria
18.6km (11.6 miles) ⓘKohlbach Alp, Salla, Maria Lankowitz, Voitsberg District, Styria, Austria
20.8km (12.9 miles) ⓘStumpf in Berg, Krenhof, Köflach, Voitsberg District, Styria, Austria
23.9km (14.8 miles) ⓘSalzstiegel house, Kleinfeistritz, Weißkirchen in Steiermark, Murtal District, Styria, Austria
25.8km (16.0 miles) ⓘWald tunnel, A9 Motorway tunnels, Wald am Schoberpass, Leoben District, Styria, Austria
26.9km (16.7 miles) ⓘStyrian Erzberg, Eisenerz, Leoben District, Styria, Austria
30.9km (19.2 miles) ⓘS35 motorway tunnel (Kirchdorf tunnel), Kirchdorf, Pernegg an der Mur, Bruck-Mürzzuschlag District, Styria, Austria
32.6km (20.2 miles) ⓘSchlossberg tunnel, Kapfenberg, Bruck-Mürzzuschlag District, Styria, Austria
References
Roland Nilica
 
and/or  
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