David Weaver
too slow for practical use, but makes for a spectacular picture.

You can see why it sets a razor out with a wonderful initial edge.

In the world of $600 razor stones, I have had more comfortable shaves with stones in some cases, but there literally is no natural stone on earth that comes close in fineness. This is a hard thing for some people to reckon with after they've just spent $600 on a yellow/green escher that's not even as big as a normal bench stone.

The dots are oil. no practical buffer use that I can think of, and I hope you like green if you plane to use it, because you'll have green fingers, green marks on your face, a green shirt, and if you ever drop the pigment anywhere, you'll never get it all out.