By David Robson, Chief Geophysicist NSW Department of Resources & Energy. Delivered at the 7^th National Opal Symposium held at Lightning Ridge in July 2011.

 

Opal Leaflet published by Queensland Mines & Energy, Authors: B. Neville, D. Horton & W.Cooper, 2009 update.

Presented by Jingping Zhe of ZZ Resistivity Imaging Pty Ltd and Brian J Morris principal geologist PIRSA Geological Survey Branch, at the 2007 National Opal Symposium.

Mining and Exploration Tenures, Native Title agreements, conditions and costs explained. Presented at the 2007 Symposium by Nathan Brown, Mining Registrar Emerald, Dept.of Mines and Energy Qld.

OHZ's prospectus (81 pages) contains the strategy and geological basis for the development of a publicly listed Opal mining company on the vast Opal fields of Queensland.

Major provisions of the Opal Mining Act - Information Sheet from the Office of Minerals & Energy Resources SA, September 2002.

Can Granny's favourite gem shine again? - IPO Watch by Tony Featherstone, BRW, June/July 2008.

In Colour - ICA Magazine Summer 2008.

By Brian R. Senior and Lewis T. Chadderton in The Australian Gemmologist, 2007.

By Jack Towsend in the MESA Journal April 2004.