The NRG will host over one hundred large rocks, anticipated to be between 5 and 20 tonnes each, which will be transported to the NRG site from across the Australian continent. Numerous eye-catching rock types will be sourced, including fossils and ore samples. Each rock specimen will have a fascinating story to tell, and will have signage and website information to explain its significance. A walk through the Rock Garden will be a journey through time, charting the evolution of the continent during the last four billion years.