the results, which are published by the journal Applied Surface Science,
demonstrate that these variables have made it possible to confirm that
the marble analyzed came from different quarries: Carrara in Italy;
Proconnesos, Docimium and Aphrodisias in Turkey; and Thassos, Paros and
Pentelicon in Greece...
http://www.stone-ideas.com/2016/05/05/underwater-research-near-naples-the-marble-used-in-roman-villas-came-from-quarries-in-carrara-turkey-and-greece/
http://www.stone-ideas.com/2016/05/05/underwater-research-near-naples-the-marble-used-in-roman-villas-came-from-quarries-in-carrara-turkey-and-greece/