In case anyone is curious, I tried cutting stone and the result is kinda fascinating, though ultimately unsuccessful
That ~1/32nd of an inch (.8mm) of dark grey is 120 passes at 500/100
I did 1 pass, then 10, then 10 again, then 99
It’s definitely cutting, but the quartz was getting hot. After pulling it out I discovered it had also gotten brittle, like “I could crack off a piece at the cut with no effort” brittle
A single cut makes a nice deep engrave though!
Which might be useful to know: 500/100 there too