Originally Posted by
awerby
Diamond tools are generally used for stone. There are various types, from carbide tools with a coating of diamond film, to shapes covered with plated-on diamond particles, to PCD diamond tools composed partly of metal with diamond edges applied, to sintered tools made from metal and diamond particles melted together into a mold. Which will work best for your project is difficult to say at this point, and the speeds and feeds vary according to the type of tool used and what you're using it for.
Are you going to be doing this wet or dry? Wet works better, for both the tools and the stone. But your machine will need protection from the abrasive slurry produced - bellows protectors for all sliding surfaces. You can cut soft stones like marble dry, but dealing with the dust will be a formidable challenge. If you're serious about doing this, I'd suggest setting up a machine especially for stone work, and keeping it well away from all the other machinery you've got.