Chisels
The point, the claw, and the flat — the three edges that start every carve.
Every stone carve starts with three edges. You could buy forty chisels, and every one of them is a variant of these three.
The three
point a four-sided spike — roughs out mass fast claw a toothed flat — textures, removes in lines flat a smooth edge — the finishing face
How to hold them
The chisel is an extension of your fist, not your fingers. Hold it like a hammer, let the mallet do the work, and keep the angle shallow — steep angles bruise the stone and will chip the edge off your chisel before the day is done.