I got this off the bay a while back just out of curiosity. The wooden box is built to hold a razor and also has a stone and small strop on bottom. The stone is the interesting part to me. It is a natural stone mostly green in color. The green is streaky varying from light green to dark. When wet these colors come out much more. It also has areas that have speckles of a golden color in it. The slurry is a light brown color. At first I thought it may be a charnley but it laps and slurrys way too easy to be a charnley. I dont think its a thury either. I have had several of both thuringians and charnley forests and it is unlike any I have owned. It sounds strange compared to my other naturals. Kinda of like what I think honing on a chalkboard would sound like. It produces a fantastic edge whatever it is. Here are some pics.