Sorry but the moor is still full of stones of all shapes and sizes....Bronze Age man would have had far more choice than we have now....
If he had wanted a pointed stone he could easily have found one...I could take you to several tomorrow that have not moved in 1,000s of years.
Why would they spend time chipping away at stones when there were plenty lying around just waiting to be chosen?
I'd agree with most of that Mark. I have loads photo's of 'pointy' stones lying around on the moor that are quite obviously unworked but I also see stones that have, to my eye, been worked on. Most of the circles I have seen on the moor have some pointy or triangular stones in them, sometimes both and it seems to have been a pre-requesite that they should have one. Why I have no idea unless possibly it was a status thing or directional thing or maybe pure chance but I find it interesting nevertheless. Leaze on the other hand 'appears' from a distance to be different altogether having sturdy chunkier rectangular stones and no tri's although until I get to see it up close can't confirm that.