I'm remodeling the master bathroom and would like to update the marble vanity that has outdated double shell shaped moulded sinks. Problem is that it match the garden tub and shower stall, plus it's an odd size (67"). My question is can the sinks be cut out and how, and new drop in sink be...

Hi, I am trying to figure out the best and neatest way to cut large circles in 30mm marble. Is there some sort of expandable hole cutter like for wood?