The problem is that I need to trim a 1/2 inch deep and 7" long piece
off of the edge of a Marble Vanity Top. The Vanity is a furniture
grade vanity with a marble top that needs to fit into a space that is
about 1/2 inch too narrow on one side toward the back of the top. I
can cut some trim to make way but still need to cut the edge off of
the vanity top. I have a great tile saw but it would require
disassembly of the vanity and taking it to the saw.

Is there an easy way to cut this with any standard tools?