The Ice Stone evolves Alolan Sandshrew and Vulpix into Sandslash and Ninetales. Source: Experience
In Sword and Shield, two new Pokemon evolve via the Ice Stone, in addition to Alolan Vulpix and Alolan Sandslash. The Ice Stone now evolves Galarian Darumaka into Galarian Darmanitan. It also evolves Eevee into Glaceon, as Galar has no Icy Rock.