Eventually

Neither Ruby nor Weiss knew how long they were searching. Eventually, though, Weiss found the rock on her side, the key still secure inside. She ran over to Ruby's side, holding it triumphantly over her head.

"Hey, look!" she shouted. "I found it!"

Ruby stood and saw Weiss approaching quickly. Ruby grabbed the rock from her and confirmed it was what they needed, smiling beneath her helmet when she saw the small brass key shining up at her.

"Ok, we've waisted enough time already," Weiss said. "We need to get back to the dorm, now. Could you get us there with you semblance?"