Floor help

In the new house, we have polished marble tile (I think that's what it is--the old owner said it was Italian marble.)

Anyway, the finish is very dull. Anyone know how to polish it up? Has anyone ever rented a machine or had a service come in?

Here are a few pics (ignore the mess!!!)


Thanks!

Message edited 7/20/2011 9:08:59 PM.