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Natural Iyo Nagura stone, square ± 50 gr. (いよ ・名倉)

€ 9,95 (including 21% VAT)

Japanse Iyo Nagura stone, about 50 grams square

High quality Japanese Nagura stone. This natural "slurry" stone comes from the Iyo mine, the oldest mine in Japan (started 1500 years ago). The Iyo mine is located in the Ehime province in Japan.

This stone is specifically intended for creating a slurry on Japanese water stones. This slurry provides a faster grinding result with a better polishing. Only to be used on polishing stones (from # 2000 grit).

These special Nagura stones ensure that the surface of your Japanese water stone fills up less quickly and stays cleaner.

These stones are square but different in proportion, it is therefore not possible to select a specific stone. If you want to choose a stone yourself then you are of course welcome in Hoevelaken (by appointment). If you order a stone online, we will choose a nice one.


  • Dimensions of the stone: varies
  • Grain: between # 4000 and 6.000 grit
  • Weight between 50 and 70 grams
  • Natural stone

A Nagura stone is very important when sharpening traditional Japanese knives.
Natural sharpening stones normally consist of about 2/3 SiO2 (silicon dioxide), which provides the grinding effect and about 1/3 Muscovite (A = K +, B = Al3 +, X = Al3 +) KAl2 (AlSi3) O10 (OH) 2 that serves as binding material. The stones were formed about 70 million years ago. Because they were formed from sediment that had been submerged, you would think that they are stable when they are wet. But after the stones have been carved out and cut to size, this can change, because the binding material, which is at least partially soluble in water, can dissolve over time and peel the abrasive particles unevenly. This decomposition process, however, is very slow so these stones may be under water for a longer time, but for sustainability it is better not to leave these stones in the water continuously if you do not use them every day.

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