Where to get a Dawn Stone in Pokemon Moon?

Question

I want to evolve my female Snorunt into a Froslass, but I can't find a dawn stone. Where can I find one?

Answer 1

The only way to get a Dawn Stone is in the post-game, in Hau'oli City. However, it is possible for your boxed Pokémon to find a Dawn Stones in the Poké Pelago.

On Isle Aphun, at Rank 1, it is possible to receive Dawn Stones from Path for Brilliant - Stone Hunting!
At Rank 2, it is possible to receive Dawn Stones from Path for Interesting - Item Hunting!

Source
Other source

Comments

Any idea  where in Hau'oli you get it post-game?

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Sorry, I'm not there yet :\ Apparently Guzma gives it to you.

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Found it. After you beat the Elite 4, Guzma is in the house just south of the Berry Farm. Talk to him there and he will challenge you to a fight on the beachfront. He gives you a dawn stone for beating him.