Tannerkivi

The Stone Stone (in-game name Tannerkivi) is an Inventory item. It turns nearby solid materials into Soil when held and causes the player's kicks to create a miniature earthquake around them.

Obtaining
Tannerkivi spawns in the world in a similar way to Kiuaskivi or Ukkoskivi, sometimes appearing on item pedestals or being dropped from chests.

Tips

 * This item can be helpful for digging, as it can turn tougher and harder materials into soil which you can easily dig through.
 * Kicking becomes extremely dangerous, as the earthquake happens even if it's not being held.
 * The "soilification" can also be dangerous, as it causes nearby explosive canisters and barrels to also turn into soil and detonate.