Unknown Awasedo 677g Japanese Natural Sharpening Stone

   Unkonwn Mine Awasedo 677g (1lb. 7.9oz.) Japanese Natural Sharpening Stone 195mmX71mmX19mm   It is used an old Japanese natural fine grit sharpening stone. It looks very nice shaped condensed stone.     Hardness-------------8.6 It raises very good amount of black slurry quickly. It looks it does not need tomo nagura or the device to raise the slurry (worn Diamond lapping stone). (Scale; 1 to 10, 1-3 is very soft muddy rough grit whetstone 3-6 is soft medium grit whetstone, 6-8 is hard medium grit whetstone; 8-10 is fine grit whetstone) Particle Size----------9.0 It makes my blue II steel kasumi blade knife Jigane became light silver color to semi-mirror finish, and Hagane became mirror finish. It is not too hard and not too soft stone.  It is ideal hardness to me. (Scale; 1 to 10, 1-3 give deep scratch marks to the steel, 3-5 is delete the 1-3 scratches, 5-8 makes 3the steel cloudy, 8-10 makes the steel semi-mirror finish or mirror finish) Natural whetstone has wider capacity than ar