If you are registered, you get access to the members only section, can participate in the buy & sell second hand forum and last but not least you can reserve your preferred username before someone else takes it.
Does it turn distinctively more yellow when moistened?
In that case, Torben is probably correct.
Otherwise, it could be a La Grise as well. Or perhaps a La Nouvelle Veine.
Some Coticules are not that easy to identify.
Can you gives us a few more indicators?
-Does slurry turn gray after a few strokes (apply a bit of pressure)? Light or dark gray after a few minutes of work?
-How's the "draw" on slurry? on water? glasslike?
-Is there a feeling of suction while honing on water?
Draw on slurry is not glass like but its not chalky either.
On water only definitely glass like, if the stone starts to dry a little, some swarf from the razor will release.Not sucktion feeling on water, but then again it might happen if I stay long enough. The razor is shave ready before that though.
A few appearance details that did not show on the pics very well. There are a few orange-red specks, the visible veins are the same color as the rest of the stone. The stone does not turn more yellow when wet. Guys let me know if you need more detail.
That rules out "La Grosse Jaune".
I'm leaning towards "La Nouvelle Veine".
Look carefully at the surface while wiggling it under a light source. If there are "mirroring" spots present, it's most likely a La Nouvelle Veine. If the stone has an even mat shine, it's a "La Grise".