Thread: Calling all rock hounds- what is this stone?

Ok. I think I know what I have here but I am in no way an expert and would like some opinions from others that have more experience.

It is extremely hard and almost impossible to make a slurry but works very well and efficient as a finisher. As you can see it is a dark gray to light gray with some tan/brown mixed in. It seems to have layers when looked at from the edge. The only slurry I was able to get was with a DMT and it was light gray and smelled like mud and tasted like......umm never mind.

Ok. What's your thoughts on what this is?