Yeah, I think.
they also allow you to enter Cerulean cave.
Alright, its a little complicated, so I'll give you the short version.
The Ruby
To get the ruby you'll be told to go talk to the guy who runs the game corner on 2 Island. What you'll find when you go to talk to him is that he's hungry and he wants his daughter to bring him his lunch, but he doesn't know where she is and he's worried. He'll ask you to go to his house on 3 Island.
When you get there, you'll find that a biker gang has taken over the island. Beat them (It's 4-5 battles one after the other) and then head around the island. The game corner man's daughter is in the forest on 3 Island. Find her, she'll give you his lunch, take it back, he'll give you the ruby, which you can take back to 1 Island
The Sapphire
This one is tougher, and you need to beat the Elite 4 to get it. Once you do that, go to the cave on 4 Island, where you'll meet up with Lorelai and some rockets. Help her beat the rockets and she'll tell you that the rockets need a good beating. If you go to 5 Island you'll find their headquarters, but you won't be able to go in, cause you need two passwords, one of which you'll be given by the rockets you help Lorelai beat. Go onto to 6 Island. If you walk around 6 Island you'll eventually find your way to an odd looking door with some braille on it, like you'd find when looking for the Regi's in RSE. It says CUT, so use cut on the door by entering your pokemon menu and manually telling your pokemon to use cut. Go in there, you'll get the second password. Head back to 5 Island and go into the rocket hideout, where you'll find the sliding panels like in the Celadon game corner. After you beat all the rockets, you'll get the sapphire, which you can give to the guy on 1 Island.