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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Sericite from
Martegn - Muttala Sura, Innerferrera (Calantgil), Ferrera, Viamala Region, Grisons, Switzerland


Locality type:Vein
Classification
Species:Muscovite var: Sericite
Formula:KAl2(AlSi3O10)(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Sericite data
Locality Data:Click here to view Martegn - Muttala Sura, Innerferrera (Calantgil), Ferrera, Viamala Region, Grisons, Switzerland
Data Identifiers
Mindat Occurrence Record ID:821994
Long-form Identifier:1:3:821994:7
GUID (UUID V4):0
Nearest other occurrences of Sericite
23.2km (14.4 miles) ⓘLake Grevasalvas, Julier pass area, Bivio, Surses, Albula Region, Grisons, Switzerland
44.0km (27.3 miles) ⓘPunteglias mine (Puntaiglas mine), Trun, Surselva Region, Grisons, Switzerland
55.9km (34.7 miles) ⓘCampolungo pass, Campolungo, Piumogna Valley, Leventina, Ticino, Switzerland
62.6km (38.9 miles) ⓘRossbodenälpetli, Unteralp Valley, Andermatt, Urseren, Uri, Switzerland
63.6km (39.5 miles) ⓘForcellino Pass, Piateda, Sondrio Province, Lombardy, Italy
63.7km (39.6 miles) ⓘAmsteg power station, Amsteg, Reuss Valley, Uri, Switzerland
71.3km (44.3 miles) ⓘVei, Miglieglia, Lugano, Ticino, Switzerland
71.3km (44.3 miles) ⓘLa Monda Mine, Aranno, Lugano, Ticino, Switzerland
71.6km (44.5 miles) ⓘMonte Pellegrino, Miglieglia, Lugano, Ticino, Switzerland
72.2km (44.8 miles) ⓘPonte Aranno, Novaggio, Lugano, Ticino, Switzerland
References
Brugger J. (1996): The Fe, Mn, (V, Sb, As, Be, W) deposits of Val Ferrera (Graubünden, Switzerland). Unpublished PhD Thesis, Univ. Basel. 188 p.
 
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