1. Australian National Gemstone, Australian Government, Department of the Prime Minister and Cabinet. https://www.dpmc.gov.au/government/australian-national-symbols/australian-national-gemstone . Accessed 15 Mar 2017
2. Baltrusaitis J (1989) Aberrations: an essay on the legend of forms. MIT Press, Cambridge, Mass
3. Better World Arts. Cross Cultural Projects. http://www.betterworldarts.com.au/about . Accessed 15 Mar 2017
4. Bramall J (2015) Australian Opal Centre: a glittering palace for the queen of gems. GAA J 25(9): 304–315
5. Brueckner M, Spencer R, Wise G, Marika B (2014) Indigenous entrepreneurship: closing the gap on local terms. J Australian Indigenous Issues 17(2):1820–1829