Natural Whetstones

I made these whetstones to sharpen my tools
Supplies

two rocks or more that you would like to make into whetstones
Finding Materials

Look for some nice flat stones that are the shape/size you desire.
Submerge

Leave the stones fully submerged for five minutes (Important!).
Grind

Grind the stones together until they are flat
Polish (optional Step)

polish the stone against each other to make a stone that will make a scary sharp edge (If desired).
You Did It!

If you have followed all of the steps to here then you will have some natural sharpening stone.