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It's a showdown with rare earth elemental ore Monazite-(Ce) and index mineral Andalusite.
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Chalcedony from
La Sassa carbonate vein, La Sassa, Montecatini Val di Cecina, Pisa Province, Tuscany, Italy


Locality type:Vein
Classification
Species:Quartz var: Chalcedony
Formula:SiO2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Chalcedony data
Locality Data:Click here to view La Sassa carbonate vein, La Sassa, Montecatini Val di Cecina, Pisa Province, Tuscany, Italy
Data Identifiers
Mindat Occurrence Record ID:1413307
Long-form Identifier:1:3:1413307:7
GUID (UUID V4):0
Nearest other occurrences of Chalcedony
0.5km (0.3 miles) La Sassa, Montecatini Val di Cecina, Pisa Province, Tuscany, Italy
4.2km (2.6 miles) Malentrata, Pomarance, Pisa Province, Tuscany, Italy
5.2km (3.2 miles) Poggio Castiglione, Canneto, Monteverdi Marittimo, Pisa Province, Tuscany, Italy
6.3km (3.9 miles) Monterufoli, Pomarance, Pisa Province, Tuscany, Italy
8.8km (5.4 miles) Canneto Mount, Canneto, Monteverdi Marittimo, Pisa Province, Tuscany, Italy
15.6km (9.7 miles) Miemo, Montecatini Val di Cecina, Pisa Province, Tuscany, Italy
21.6km (13.4 miles) I Gulfi (Termine), Chianni, Pisa Province, Tuscany, Italy
21.7km (13.5 miles) Temperino Mine, Campiglia Marittima, Livorno Province, Tuscany, Italy
27.7km (17.2 miles) Podere Montevecchio (Podere Montevecchio Mine; Miniera della Sambuca), Gerfalco, Montieri, Grosseto Province, Tuscany, Italy
28.1km (17.5 miles) Botro Masaccio quarry, Rosignano Marittimo, Livorno Province, Tuscany, Italy
References
 
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