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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Cordierite from
Dervio-Colico road tunnel, Dorio, Lecco Province, Lombardy, Italy


Locality type:Tunnel
Classification
Species:Cordierite
Formula:Mg2Al4Si5O18
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Cordierite data
Locality Data:Click here to view Dervio-Colico road tunnel, Dorio, Lecco Province, Lombardy, Italy
Data Identifiers
Mindat Occurrence Record ID:968647
Long-form Identifier:1:3:968647:2
GUID (UUID V4):0
Nearest other occurrences of Cordierite
21.5km (13.4 miles) ⓘPizzo Bresciadega, Codera Valley, Novate Mezzola, Sondrio Province, Lombardy, Italy
22.6km (14.0 miles) ⓘCodera streambed, Codera Valley, Novate Mezzola, Sondrio Province, Lombardy, Italy
22.9km (14.3 miles) ⓘRebolgin Valley, Lostallo, Moesa Region, Grisons, Switzerland
26.5km (16.5 miles) ⓘCasnaggina Valley, Villa di Chiavenna, Sondrio Province, Lombardy, Italy
26.8km (16.6 miles) ⓘCasnaggina Valley, Castasegna, Upper Val Bregaglia, Bregaglia, Maloja Region, Grisons, Switzerland
27.2km (16.9 miles) ⓘPizzo Trubinasca, Bondasca Valley, Upper Val Bregaglia, Bregaglia, Maloja Region, Grisons, Switzerland
35.8km (22.2 miles) ⓘSissone Valley, Chiesa in Valmalenco, Sondrio Province, Lombardy, Italy
37.1km (23.1 miles) ⓘPasso Vazzeda, Val Forno, Upper Val Bregaglia, Bregaglia, Maloja Region, Grisons, Switzerland
38.6km (24.0 miles) ⓘMonte del Forno, Val Forno, Upper Val Bregaglia, Bregaglia, Maloja Region, Grisons, Switzerland
41.7km (25.9 miles) ⓘCuriglia, Curiglia con Monteviasco, Varese Province, Lombardy, Italy
References
Mottana A., Fusi A., Bianchi Potenza B., Crespi R., Liborio G. (1983): Hydrocarbon-bearing cordierite from the Dervio-Colico road tunnel (Como, Italy). N. Jahrb. Mineral. Abh., 148, 2, 181-199
Rosaspina C. (1984): Cordierite negli scisti sillimanitici dell'Alto Lario Orientale. Riv. Mineral. Ital., 8, 3 (3-1984), 110.
 
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