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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Biotite from
Corcolle Quarry, Rome, Metropolitan City of Rome Capital, Lazio, Italy


Locality type:Quarry
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Corcolle Quarry, Rome, Metropolitan City of Rome Capital, Lazio, Italy
Data Identifiers
Mindat Occurrence Record ID:13799
Long-form Identifier:1:3:13799:7
GUID (UUID V4):0
Nearest other occurrences of Biotite
18.9km (11.8 miles) ⓘSpiaggia del Lago Road, Castel Gandolfo, Metropolitan City of Rome Capital, Lazio, Italy
21.4km (13.3 miles) ⓘCapo di Bove, Rome, Metropolitan City of Rome Capital, Lazio, Italy
21.8km (13.5 miles) ⓘI Cappuccini (Cappuccini Quarry), Albano Laziale, Metropolitan City of Rome Capital, Lazio, Italy
22.3km (13.9 miles) ⓘParco Chigi, Ariccia, Metropolitan City of Rome Capital, Lazio, Italy
22.9km (14.2 miles) ⓘCastelli Romani bypass road (Via Appia Bis), Albano Laziale, Metropolitan City of Rome Capital, Lazio, Italy
27.1km (16.9 miles) ⓘAcqua Acetosa, Rome, Metropolitan City of Rome Capital, Lazio, Italy
36.1km (22.4 miles) ⓘBiachella Valley, Sacrofano, Metropolitan City of Rome Capital, Lazio, Italy
36.2km (22.5 miles) ⓘLapilli quarry, Magliano Romano, Metropolitan City of Rome Capital, Lazio, Italy
37.1km (23.1 miles) ⓘFosso Attici, Magliano Romano, Metropolitan City of Rome Capital, Lazio, Italy
37.6km (23.3 miles) ⓘMonte Cavalluccio, Campagnano di Roma, Metropolitan City of Rome Capital, Lazio, Italy
References
Del Caldo, A. (1971) Località mineralogiche consigliate. Le vulcaniti laziali. 2) Minerali della pozzolana romana. Notizie del Guppo Mineralogico Lombardo, 2, 1 (marzo 1971), 9
Del Caldo, A.; Moro, C.; Gramaccioli, C.M.; Boscardin, M. (1973) Guida ai minerali. Fratelli Fabbri Editori. 208 pp.
 
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