Hi Patrick, I have attached some information about the gemfields in Queensland, Australia. Most of our digging was at Tomahawk Creek, but this field is about 60k from the nearest town Rubyvale and not easy to access. However there are a lot of other fields closer that you can dig at and the list is with the attachment also a Web address to go to and seek further information on the Qld Government Website.
If you did not want to go out to any of these places you could do what a lot of other tourists do and pay a local miner with a lease at Rubyvale or sapphire to get a load of gem bearing gravel and sieve through that. easier but not as much fun or reward as digging you own.