Where to get a Dawn Stone in Pokemon Sun or Ultra Sun?

Question

I want to evolve my male Kirlia into a Gallade, but I can't find a dawn stone. Where can I get/find one?

Answer 1

In Sun, you get one during the story in Hau’oli City after rematching Guzma. In Ultra Sun, you can get one at Royal Avenue after beating Necrozma. In both, you can get more at Poke Pelago by sending your Pokémon on “the path for brilliant-stone hunting,” although this method can be unreliable since the items you get are completely random.

Source