On Wed, 06 Jun 2018 01:23:02 -0400, wrote:

You might be able to do it with an abrasive masonry blade but I know a
diamond blade works. Clamp a board on it as a guide and go slow.

That's what a professional installer used on my CM shower surround. It was raining when he cut
it, so he did it in my garage. Now everything in my garage is coated with CM powder! What a
mess!

--
croy