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When using  Any Axe or  Any Pickaxe to Chip a  Boulder occasionally, instead of an Ore or Stone, you will instead receive a  Whetstone at the same Purity as the Boulder.
CAUTION: A Whetstone counts as  Any Stone in recipes - when crafting or Paving make sure the correct item is selected.
Whetstone Purity
The Purity of a Whetstone comes from the Boulder it was Chipped from. Only Boulders from within a  Mine Entrance have Purity, which is from a combination of Mine Level, distance from the ramp, and chance. A Whetstone can be used to Sharpen Weapons such as  Halberds and  Spanish Sabres to increase their damage.
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Whetstone
