As everyone thinks it's a coticule, my mind has warmed to the idea. I never thought it was one as the texture looks so different to my coticule. This is more of a glassy finish with a slight shine to it which increases the more I use it. It is very thin with no sign of BBW anywhere, again a reason I dismissed the possibility of it being a coticule. I tried to raise slurry again on it and it is in fact harder than other coticules, the slurry only turning a hint of grey after numerous circles with a razor. I therefore believe it to be a slow cutter and a fine finisher than other coticules, but later testing will be conclusive.