Unknown Awasedo Fine Grit Japanese Natural Sharpening Stone 1lb. 0.7oz. (473.6g)
It is used an old Japanese natural fine grit sharpening stone.
It looks very nice heavy condensed stone.
The bottom side is not flat, and it is not stable during sharpening, so it needs stone holder or attaching wooden block.
It raises very good amount of black slurry quickly.
It looks fast cut stone.
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)
It makes my white II steel kasumi blade knife Jigane became right frosted silver color, and Hagane became mirror finish.
It is not too hard and not too soft, ideal hardness stone to me, and it makes very fine finish.
(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 artificial whetstone, and actually, we do not know until sharpen blade on the hone for a while. Because artificial whetstone molecules do not break down to smaller sizes, but Natural whetstone molecules are possible to break down to smaller sizes, and those molecules are mixed with sharpened steel molecules, and make Jigane as suitable Jigane color, and Hagane as suitable Hagane color. It is natural mystics.