"Well, not just ANYWHERE - there are areas where you are more, or less likely to find stuff, of course! Knowing the environment is very helpful - quartz, for example, is often found in riverbeds - some stones are close to the surface, others may need to be dug for."

He nods. "I think if you want something for a friend, it would be better - we could certainly go out and look, but there's no way of knowing if we would find something, how long it might take, or if it would be suitable."