A Dusk Stone is a type of evolutionary stone used to evolve certain species of Pokémon:
It can be obtained by crafting it, as a drop from boss Pokémon, or from PokéLoot chests. The shards used to craft Dusk Stones can be obtained by mining DawnDusk ore at dusk or by using Forage on stone-based blocks with a Dark-type Pokémon.
Dusk Stones are also used to make Dusk Stone tools and Dusk Stone armor.