Different types of textures break/cut differently. A chisel and small hammer can be used if you go slow and work it. Larger rock an angle grinder works or any saw with a diamond blade.
Doesn't matter what kind of rock it is. I use several tools.....a chop saw, a circular saw or a tile saw or even my dremel. All with masonry or tile cutting blades in them. It just depends on how big of a piece I need to cut.
i have my kids take the boulders out in to the cul de sac and tell em to go at it. Makes for stuff they can break and you get some unique looking pieces.
I used a miter saw with a masonry blade on it for mine. Do it outside and wear a dust mask! And don't forget to close the garage and widows or everything will have a nice coat of dust on it.
1. no matter what you do the rock will never break or cut the way you really want it to.
2. Hammer and a screw driver are the best tools to reshape rocks
3. Tile saws or grinders will work too but very slowly.
Depends on the rock, the BRS reef saver or Marco I use a hammer and chisel, I like Pukani because you can use a hack saw or standard wood saw blade to flat side and carve away with ease.