About This Item
Yaginoshima Suita Japanese Natural Sharpening Stone 1003.2g (2lb.3.4oz.)
212mmX74mmX25mm from #4000 to #6000 Grit Yaginoshima mine is located on nearby Aoto mines (Kameoka-city). The mine has been owned by local government time to time for over 400 years. Yaginoshima whetstone is medium high hard stone in Kyoto finishing whetstones. The mine has yielded Awasedo, Iromono, Suita, and others (variety of hones).
#6000 to #8000 grit for chisel blade or Japanese plane or high carbon cooking knife kasumi or Damascus pattern
It raises very good amount of black slurry, so it does not need Tomo Nagura or a devise that generates slurry. (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--------- 8.5
My blue II steel blade knife Jigane became cloudy silver color, and Hagane became from light silver color to semi-mirror finish. It looks fast cut stone. (Scale; 1 to 10, 1-3 give deep scratch marks to the steel, 3-5 is delete the 1-3 scratches, 5-8 makes the steel cloudy, 8-10 makes the steel semi-mirror finish or mirror finish)
Natural whetstone cannot be compared with artificial whetstone hardness and particle size. Probably #4000 to #6000 or higher grit as artificial whetstone.
Natural whetstone has wider capacity than artificial whetstone, and actually, we do not know until sharpened the 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.