It doesn't really look like any of the stones I have lusted after, but it called to me and couldn't resist.

haven't handled many, but at least those that I have kinda looked like others I had seen pictures of... It was dense and heavy, but light at the same time.

The surface is smooth and hard, but can be scratched. It has beautiful waves of black and greys and some browns spots. It didn't seem to harm the edge off my coticule, but I may not have spent enough time on it to affect the edge. It did feel like a great edge, but not so much different from my coticule and nakayama edges, but that isn't saying much.

the quarry of origin and general reputation? can anyone help me identify this stone?