This rock is from near the boston bar first nations in british columbia. It was sanded by hand for perhaps 4 hours in total (100 grit sandpaper down to a 3000 grit) and the polished with a rotary tool.
This one has seen so much sanding, 100 to 3000 again and again, rotary polished and buffed with a tiny bit of beeswax, although these stones didnt really need it.