Sharpening an object causes that object to change shape.
Each stone incorporates a groove for sharpening pointed objects such as fish hooks and darts.
Stones can be reshaped.
what can be done to stones?
(1) heat
(2) Bend
(3) reshaped
(4) erosion
(5) Relieve pain
(6) protect them
(7) kill them
(8) loose soil