If the jewelry is clear, shiny and transparent, is actually usually of high quality, however if you see some cracks or spots on the surface of the crystal, it can be inferior.
Additionally you get to meet and live with Australians which an interesting cultural experience within itself. https://www.benzinga.com/pressreleases/23/09/34698605/contractors-state-license-center-is-offering-convenient-contractors-license-classes-over-zoom-in-lo