Find Tidestone by digging in Tide Caverns' Mines

To find Tidestone in the Fields of Mistria, players must explore floors 21 to 40 of the Mines, known as Tide Caverns. Access requires breaking the Water Seal on floor 20 by placing specific items found in the Upper Mines. Tidestone is not found lying around; players must dig at marked spots using a Pickaxe. Alternatively, reaching Archaeology level 15 allows players to buy the "Stoneturner" Skill Perk, enabling Artifact collection from breaking stones. Tidestone is primarily used to complete the Tide Cavern Artifact Set at the Museum. After that, it can be used to craft a Toilet as part of the Bathroom Set, requiring additional resources and a recipe from Merri's Stall.