Go to Six Island with a pokemon knowing Cut. when you get to the door with Braille, use Cut. In the middle is a stone. It has Braille on. You'll have to read it. But here's a tip. If there's 2 letters in the braille, it means up. If there's 5, it's right (as in -->, not 'you're in the right room), if there's 4, it's either down or left. You'll find the sapphire, and when you go to pick it up, a TR scientst will pick it up, then tell you the password. Go to the TR warehouse to get the Sapphire back.