Just to confuse further.
Asagi = light yellow but Asagi is also used to refer to shades of blue & green eg Mizu Asagi.
Had a look at the bevel with a loupe. No scratch pattern but a grainy pattern. I don't have a microscope that I can take pictures with so I borrowed this picture from FatboySlim to show you what the edge looks like. (post 33 of this thread: http://straightrazorpalace.com/honin...ictures-4.html )
http://i76.photobucket.com/albums/j2...07Asagi200.jpg
it is a bit greyish greenish a bit lighter than the pic in the OP. Less green and greyer than a Y/G Escher.
If you google mizu asagi and look at pictures it is more or less like most pictures of the stones that google shows.
Asagi color is light green with the slurry being with light yellow hue. Mizu Asagi just means light gray in the context of the myriad of gray asagi stones available from vendors. IMHO folks get hung up on the names too much, they mean nothing for the honing results and only mean something for the sellers who charge extra for those types of things.
If the stone works then the rest is irrelevant IMO.