Can you get a shiny stone in Poke Pelago?

Question

I already used the shiny stone found on Poni Island. Can I get another one from Poke Pelago? I sent Pokemon to the cave so many times but they just gave me other evolution stones

Answer 1

You can rarely find it in the Path for Brilliant-Stone Hunting.
source

Comments

Really ? I found 5 of them in a week though