>You can take what you like buddy.
>Fact is no one including myself have ever been able to
So you have finally done an experiment where you are not using twice the ideal lapping pressure for quartz abrasive (effectively crushing it) and spraying it off at a few 1000+ rpm so that it's "cutting" granite by fine polishing it (that not really "scratching" either that is actually what the toothpick was doing and that experiment was still more efficient that your claimed experiment by just the power of crayon colouring alone)? Not quite as bad as claiming/insinuating that the ancient Egyptians quarried by a rate exactly the same as carving hieroglyphics on granite over and over again like Dunn (2002), but it's close
Granite is one of the rocks used to make stone tools during the Neolithic so it's already understood that it can be carved using stone age technology (for both shaping and boring) so why you were not able to figure it out with your DeWALT is the only real perplexing mystery here..... or maybe not.
Archae Solenhofen (email@example.com)