The Domes Jewel is a powerful crystal that always manages to surive whatever is done to it. It had appeared many time to the Rivers crossing there paths.
In the story ARMED AT THE BANK Emma and Jesscia read on the news of how thiefs stole just one Jewel and no money. When a photo is shown of the Jewel. Emma Smith looks in shock as she sees it. Emma speaks wherever that thing ends up it always brings trouble behind it. She also speaks of how if somebody somehow mastered its power they would be like the stone unbreakable.