Making a stone sign with a router

Quoted text begins.I would like to create a stone sign with our street number and name. I have
no experience with stone but I was wondering if this is something I can try
myself with a standard plunge router or should I try to find a professional
End of quote.

Peter, This is something that you can try to do yourself,
provided you have a patient nature. However, I'm not sure that
a router is the best tool for the job though. Good 2 fluted
carbide bits will cut softer stone, but will dull real quick in
anything that has some stiffness to it. I do use a router for
some applications, in some of the limestones I work with, but
do not use it for any finished work. I'm sure others will
disagree, but my experience has not been very positive when
trying to router letters or finished profiles. Splitting the
stone can be done using feathers and wedges or other tested
splitting techniques, a flat created on the split surface using
a grinder, rasps or other abrasive means, and the letters carved
in with a hammer and chisel. The process will be simpler if the
stone you work with is relatively soft such as a limestone, and
more difficult if you choose a sandstone or granite. Good luck
to you.
John Vancamp