There are a few different ways to sharpen a knife with a natural stone. The most common way is to use a whetstone. First, you need to choose the right grit for your knife. A coarser grit will be needed for a duller blade, and a finer grit can be used for a sharper blade. Soak the whetstone in water for about 10 minutes before starting to sharpen.
Place the whetstone on a flat surface and hold the knife at a 20-degree angle against it. Start by moving the blade back and forth across the width of the stone (perpendicular to the length of the blade), using moderate pressure. Remember to keep that 20-degree angle consistent as you move along the entire length of the blade. After each stroke, flip over your knife and repeat on the other side.
After you've gone back and forth across the width of the stone several times, start movingthe blade alongthe length ofthe stone (paralleltoitheblade). Again,moderatepressureandaconsistent20-degreeangleare key here.Once you'vegone upanddownseveraltimes,checkyourbladeto see ifit's as sharpasyou wantit tobe—ifnot,just repeatthe process until it is!