This is a hard Ohira. Slurry will develop but a nagura stone is recommended to aid in creating some slurry. This stone is great for knives, razors, and tools. These stones are mined in Kyoto Japan. Natural whetstones wear much slower then synthetic stones. This stone will last years if not tens of years.
Length - 8.1"
Width - 3.1"
Thickness - 1.25"
Hardness - 4
Grit - 9,000 - 11,000
Weight - 2 Lbs 15.9 Oz
Some stones have defects and inclusions. we cannot guarantee perfect shape and wearing. All sales are final on natural stones.