Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite
It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
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Prehnite from
Montecastelli Pisano, Castelnuovo di Val di Cecina, Pisa Province, Tuscany, Italy


Classification
Species:Prehnite
Formula:Ca2Al2Si3O10(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Prehnite data
Locality Data:Click here to view Montecastelli Pisano, Castelnuovo di Val di Cecina, Pisa Province, Tuscany, Italy
Data Identifiers
Mindat Occurrence Record ID:358750
Long-form Identifier:1:3:358750:8
GUID (UUID V4):0
Nearest other occurrences of Prehnite
20.0km (12.4 miles) ⓘPoggio del Cornocchio quarries, Volterra, Pisa Province, Tuscany, Italy
22.6km (14.0 miles) ⓘMontecatini Mine, Montecatini Val di Cecina, Pisa Province, Tuscany, Italy
23.7km (14.7 miles) ⓘCretaio, Prata, Massa Marittima, Grosseto Province, Tuscany, Italy
28.7km (17.8 miles) ⓘRialdo, Riparbella, Pisa Province, Tuscany, Italy
35.9km (22.3 miles) ⓘCrevolone Torrent gabbro outcrop, La Befa, Murlo, Siena Province, Tuscany, Italy
40.1km (24.9 miles) ⓘVal di Perga, Castellina Marittima, Pisa Province, Tuscany, Italy
46.9km (29.1 miles) ⓘCastiglioncello, Rosignano Marittimo, Livorno Province, Tuscany, Italy
50.1km (31.1 miles) ⓘFalciani bridge, Impruneta, Metropolitan City of Florence, Tuscany, Italy
52.8km (32.8 miles) ⓘMount Sant'Antonio, Impruneta, Metropolitan City of Florence, Tuscany, Italy
53.0km (32.9 miles) ⓘNalbi, Impruneta, Metropolitan City of Florence, Tuscany, Italy
References
Brizzi, G., Meli, R., 1989. L'antica miniera di Montecastelli e i minerali delle rocce circostanti. Rivista Mineralogica Italiana, 13 (3): 163-178.
Dini, Andrea, Rielli, Andrea, Di Giuseppe, Paolo, Ruggieri, Giovanni, Boschi, Chiara (2024) The Ophiolite-Hosted Cu-Zn VMS Deposits of Tuscany (Italy). Minerals, 14 (3). 273 doi:10.3390/min14030273
 
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