Aizu is a mid-range natural stone similar to Aoto at approximately 3k to 5k grit .
I was a bit skeptical about it at first because I had never heard of one.
I have found this Aizu to be considerably harder than my Aoto, so it wears much slower. It also cuts faster, but leaves a similar finish, maybe even a bit finer. This stone is most impressive on both Honyaki and SS knives. Where an Aoto cuts very slowly on these types of knives, the Aizu will grind through them very quickly.
Here are some pics.
It hase some sparkels all over the stone, very difficult to see on the picture. But very beautiful in person.
All Lines and small inclusions is not toxic at all and even can not be field.
It took me about 1 hr to lap it with 140grit Atoma Then i just gave up and there are stil some deep lines in the stone, they will go away with time
Fines of that stone is approx same as Very fine Aoto but speed man..... !!!! I took my Honyaki witch is super hard to sharpen and it took no time to raze a burr and finish was super uniform !
Wow this is my new favored medium stone ! it cuts like 1k maybe lower but finishes like 4k with mud maybe 6k.
Here is some pictures.
I figured you guys will like to know what stones will rise in price in the very near future, and what stones is best to invest in !
This list can change very fast:
But her you go
Ohira Range Suita
All kiitas almost, not Ohira or Hideryama the biggest price change i have seen on very bright hard Yellow stones, Nakayama is the biggest winer.
Karasu very big price increase for the last half year but only on harder ones soft stayed at same price
All bright stones in General got up 20 or 40 % last 3 month
Suitas very big price change also all suitas soft and hard but hard is of coarse more expensive ! As woodworkers in Japan want them
Asano naguras more then 100 % Price increase in last 6 month: Botan and Koma is now very rare !! (only Naguras with red Asano stamp ) sword polishers big demand
Uchigomori finger stones or stones also sword polishers fault, almost only Ohira produce now and they are quite expensive
Okudo Suitas, Shinden the good ones almost gone (a lot of crapy ones in the marked so be careful )
Ok i think thats it for now, i will add some more later.