Equatorial Guinea Birthstone Opal Diamond Fashion 2014 Gold Wedding Jewellery 100023

 Equatorial Guinea Birthstone Opal Diamond Fashion 2014 Gold Wedding Jewellery. 

By Aamir Mannan. 

1908 - Opal mining begins at the Grawin-Sheepyard Field in the Lightning Ridge area, increasing the importance of the opal fields in the district.

1919 - Opal mining begins at Tintenbar, continuing to 1922.

1920 - The Newfield opal area is discovered.

1985 - Seminal work by the Geological Survey of New South Wales leads to better, more scientifically controlled exploration for opals.

1989 - The Coocoran opal area is discovered in the Lightning Ridge district.

1998-1999 - The estimated value of opal production in the State is about $44 million. New South Wales (and Australia) is a leading world producer of opals.

Sources :

"Opal in South Australia", Mines & Energy Resources, SA

"Opal", Qld Dept. of Mines & Energy

Minerals NSW

"Make your own Luck with Opal", Jewellery World, June 2000.

Queensland Boulder Opal Association

"Opals", by Fred Ward, Gem Book Publishers, 1997.

"Australian Precious Opal", Andrew Cody, 1991.