Can you use a steam cleaner on marble floors?

The Bissell Steam Floor Mop removed about 85% of deeply imbedded dirt from our "soft" Italian marble floor tile; the tiles have random "grooves" which have collected 11 years of micro-dirt; the steam mop, when held over one especially "deeply" dirty tile for 30 seconds removed nearly all "filth"; I am a cynic and I was amazed/shocked, but very pleased