So I just got this stone, bad thing is it broke probably in transit but the cool thing is that it gave me a good glimpse of some of its secrets which I find absolutely darling lol. It has some sploshes of dark stuff around the whole stone, as seen in the pics the darkness seems to be ink splattered all around. The edge off the hone was incredible, it didn't feel as sharp as my renge but shaved like crazy, whats even more interesting is that I used a razor which I think is softer steel compared to my puma and an ern c&s that seem really hard and hold the edge off the renge stone I have pretty good, however this other ern I have couldn't hold a candle stick to the renge and lost its edge half way through the shave.
Using the coticule though the softer blade did an awesome job BBS and something cool I have always experienced with coticules is that somehow I get less irritation than with other hones.
Here are the pics->