Recently got this piece here from dennisthebarber. It's a piece of rock from his home state of Kentucky. Very hard, it doesn't slurry but it does produce a very nice edge. I was sent this piece and a darker. More testing will tell but currently I'm liking the darker slightly more. They're an immense amount of work to get turned into a hone so I am rather fortunate to have gotten these as I don't see him doing any more. I'm still in testing phases and getting it dialed in but so far, so good.