Serra Antica alabaster quarries, Pomaia, Marmolaio Valley, Castellina Marittima, Pisa Province, Tuscany, Italy

The alabaster is in the "Gessoso-solfifera" formation of the Upper Miocene (Messinian) as variable size nodules (from few to some hundreds of kilograms).
The quarries are 1.5 km SW of Pomaia, immediately at the south of Marmolaio torrent.
Map references:
Regione Toscana C.T.R. 1:10000 Map 284150
I.G.M. 1:25000 112IIINO Santa Luce

References:
G. De Guidi (1933): Note geomineralogiche sul giacimento di alabastro della valle del Marmolaio nei monti della Castellina - Atti Soc. Tosc. Sc. Nat., Mem. 43
G. Carobbi, F. Rodolico (1976): I Minerali della Toscana - Acc. Tosc. Sc. e Lett. "La Colombaria", Leo Olschki Ed. Firenze, pp. 278