Where do I find the ruby and saphire for celio. I beat the Pokemon league?

You get the Ruby on Island 1 and when you give the ruby to Celio, he gives you a ticket allowing you to go to islands 1-7, you will eventually be able to get the Sapphire from Dotted Hole on 5/6 island, it then gets nicked and you get it back from the Rocket Warehouse on 5/6 island.

The Ruby can be found on One Island at Mt. Ember and is in a cave that is being guarded by two Team Rocket grunts after you find and beat them, just go through the cave to get the Ruby ^-^ The Sapphire is a bit more tricky after you've given Celio the Ruby it's on Six Island in the Dotted Hole but to get in you have to use Cut on the door. After that fall down the hole in the floor and you'll enter rooms with four holes okay now fall down them in this order the top one, the one on the left, the one on the right, and lastly down the one on the bottom. And there's the sapphire. But! It will be stolen from you by a scientist and you'll have to fight through team Rockets warehouse on Five Island to get it back.
Hope I helped ^-^
~Anna The Zoroark~