I was given this the other day from a friend. i havent used it yet, only had time to lap it and try to clean it. I will try it out this weekend, but i am a little confused as to what stone it is. Sorry the pics arent great,Name: 229.jpg Views: 202 Size: 51.5 KBName: 230.jpg Views: 204 Size: 22.2 KBName: 232.jpg Views: 199 Size: 40.9 KBName: 231.jpg Views: 210 Size: 35.4 KB but it was the best i could do at 12am at night. Any help would be appreciated, thanks!