https://www.openstreetmap.org/way/23659446/history 

Is this marble machined into a flat surfaces? In such case it would be surface=paving_stones material=marble

Or is it surface=sett material=marble (see https://wiki.openstreetmap.org/wiki/Tag:surface%3Dsett )

Or maybe even surface=unhewn_cobblestone material=marble ( https://wiki.openstreetmap.org/wiki/Tag:surface%3Dunhewn_cobblestone )