Bibliography of resources used to cross-reference opal information provided on this site.
With thanks to the following authors for the advise and sharing of extensive knowledge gained through research, hard work and hands on experience. The dependable information provided in these publications is of great value.
Reference: Aracic S, 1999, Rediscover Opals in Australia, Kingswood Press Pty Ltd, Qld Australia
Reference: Pardey G, 1999, Black Opal A comprehensive guide to cutting and orientating, GP Creations, Kingswood Press Pty Ltd, Qld Australia