Complex sentence: Sealstones may also be "restored" at a cost of Magic Crystals at a spring, allowing the player to equip them from any spring in any dungeon, rather than being returned to their original location once the player leaves the dungeon.
Split into simpler sentences: Sealstones may also be "restored" at a cost of Magic Crystals at a spring. When a sealstone is restored, the player may equip that sealstone from any spring, rather than being returned to their original location once the player leaves the dungeon.