The **Ardennes Coticule 840 Belgian Blue u0026 La Pyrénéés combination sharpening stone** is a small sharpening stone you can easily carry with you. Due do its compact size this stone is mostly suited to sharpen small knives. Your pocket knife, for instance. When sharpening larger knives we recommend the [Ardennes Coticule 846 Belgian Blue and La Pyrenees combination sharpening stone, 200 x 60 mm].
The La Pyrénéés and the Belgian Blue Whetstones (BBW) from Ardennes Coticule are natural sharpening stones with unique features. The two natural stones are glued together with a layer of silicone. Each side has its own grain size.
## La Pyrénéés
The grey side is a La Pyrénéés natural stone from the French Pyrenees. This stone contains small quartz crystals that make sure the stone does what it is supposed to: sharpen your knives. This side has a grain size of approx. 1200 grit and is therefore great when sharpening relatively blunt knives.
## Belgian Blue Whetstone
The purple/blue side is a Belgian Blue Whetstone from Belgium. It is enhanced with a grain size of approx. 4000 grit. With this side you can sharpen your knife and make sure it stays sharp. Belgian Blue Whetstones consist of 30% garnets. These are particles that are released as you use it and make sure the stone can do what it is meant to: sharpen your knives. It is a 100% natural product from the Belgian Ardennes and each sharpening stone is modified by hand. Little differences in terms of shape, colour and size can therefore occur.
## Use
Make sure you add water to the stone before use. You don’t need to submerge it for a specific period of time. The grain size of this sharpening stone corresponds with a 1200 grit and 4000 grit Japanese sharpening stone. However, do keep in mind that the pressure you apply as you use the stone will also affect the coarseness of the stone. If you apply a lot of pressure more particles will be released. As such it will become even coarser. If you apply less pressure less particles will be released. Because these particles slowly wear out this sharpening stone will become finer in time.
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