Marble table refinishing?

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Hi I usually post on SO and S&B.  I have a marble coffee table for about 2 years and it's lost it's glossy finish.  I sealed it when I first got it, but never again.. Any hints on refinishing?  I really don't want to have to sand it and from what I've seen online that's the only option.  It's not damaged, just really dull.  TIA