Grindstones are used to sharpen edged melee weapons and reinforce bows and blunt weapons. Sharpening or reinforcing a weapon requires the consumption of an ingot or other object associated with the weapon type. The table below lists most variants and the required material(s):
 Grindstone Required Materials
- Occasionally the graphic for the use of a grindstone may be messed up. In such situations the individual using the grindstone is sitting too far forward or backwards, and the weapon will clip through the stone or will not touch it at all. This is merely cosmetic, and can be fixed by standing and sitting on the grindstone again.