Natural whetstone from the French Pyrenees.
The stone should be soaked in water for about 10 minutes before each use.
As this is a natural stone, there is no defined grain size.
This stone does not require any particular maintenance. If necessary, you can clean the stone with a washing-up liquid after a certain period of use by brushing it under hot water.
Advice : see the page "maintain your Laguiole knife".