Opalised dinosaur bones, how could that happen? But it's true. Josh and his dad have it confirmed by a paleontologist who warns the beautiful opalised bones are rare, and to be wary of unscrupulous international thieves. Drama develops for Josh and his cousin in an underground mine out west near Lightning Ridge. Dinopal brings to life the characters who still dig the tunnels while reminding us of the dinosaurs who lived there 100 million years ago.