Rosinante can tip them into the metal hand, since they know that one doesn't activate anything. So there's no big reaction yet, just metal fingers closing around the stones and holding them close to their chest, as if relieved to have them back even without knowing what they are yet. "I'm sorry. The ones with the arm are the worst ones. You shouldn't have had to remember any of that." If it was right after... they don't actually have much from that time. After the worst of the experiments, before the missions started, maybe. The training. They know there was training.