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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Muscovite from
Cotorniano quarry, Chiusdino, Siena Province, Tuscany, Italy


Locality type:Quarry
Classification
Species:Muscovite
Formula:KAl2(AlSi3O10)(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Muscovite data
Locality Data:Click here to view Cotorniano quarry, Chiusdino, Siena Province, Tuscany, Italy
Data Identifiers
Mindat Occurrence Record ID:413486
Long-form Identifier:1:3:413486:2
GUID (UUID V4):0
Nearest other occurrences of Muscovite
0.4km (0.3 miles) ⓘLe Cetine di Cotorniano mine, Chiusdino, Siena Province, Tuscany, Italy
17.0km (10.6 miles) ⓘPodere Montevecchio (Podere Montevecchio Mine; Miniera della Sambuca), Gerfalco, Montieri, Grosseto Province, Tuscany, Italy
18.0km (11.2 miles) ⓘBoccheggiano mines, Montieri, Grosseto Province, Tuscany, Italy
19.7km (12.2 miles) ⓘBagni di Petriolo (Terme di Petriolo), Monticiano, Siena Province, Tuscany, Italy
33.2km (20.6 miles) ⓘAccesa mine, Massa Marittima, Grosseto Province, Tuscany, Italy
34.8km (21.6 miles) ⓘFrassine, Monterotondo Marittimo, Grosseto Province, Tuscany, Italy
38.9km (24.2 miles) ⓘLa Sassa carbonate vein, La Sassa, Montecatini Val di Cecina, Pisa Province, Tuscany, Italy
40.2km (25.0 miles) ⓘGavorrano Mine, Gavorrano, Grosseto Province, Tuscany, Italy
44.0km (27.3 miles) ⓘCampo di Sasso, Bibbona, Livorno Province, Tuscany, Italy
49.7km (30.9 miles) ⓘMontorsi Mine, Botro ai Marmi, Campiglia Marittima, Livorno Province, Tuscany, Italy
References
Betti, Cesare; Pagani, Giancarlo (2000) Minerali del Senese [Minerals of Siena] - Cento località mineralogiche nella provincia di Siena [One hundred mineralogical localities in the province of Siena] (3rd ed.). Protagon Editori Toscani. 288pp.
 
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