Recently acquired some hones that appear to be naturals. This one is of particular interest. At first this was black saturated in old oil and rusty swarf and very badly dished. Jet washing and boiling many times has given me this, it was a bitch to lap. Have used it once and it seems to dull an already keen razor to the point where hht fails. Having said that I haven't learned how to use it properly but would estimate it's a good bevel setter with my current experience. Anyone have an idea what it is?
Name:  IMG_1107.jpg
Views: 312
Size:  67.2 KBName:  IMG_1108.jpg
Views: 301
Size:  68.2 KBName:  IMG_1109.jpg
Views: 324
Size:  59.5 KB