Gem-boulder-Opale

Opal Identification

  GEMMOLOGICAL LABORATORY FACT SHEET Chemical composition of Opal: Si0 2nH 20 – Hydrated Silica. • Water content in Precious Opal 3-10%. • Water content…

Magazines Catalogues

Magazines & Catalogues

AUSTRALIAN NATURAL HISTORY, The Australian Museum-Quarterly, 1963. AUSTRALIAN NATURAL HISTORY, Opal Fossils; Flashes From Lightning Ridge, by Alex Ritchie, Vol.21 No.9, 1985. AUSTRALIAN NATURAL HISTORY, Sea…

Home of Boulder Opal

The Queensland Opal fields are spread over a belt 300-400km wide with a 1000km strike. Trending in a north-westerly direction from the New South Wales border at Hungerford up to Kynuna and stretching west of Cunnamulla, Blackall and Winton out to Noccundra, Palparrara and Hamilton.

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Opal Mining Terms

Opal Miner’s Glossary

“Anyone who possesses this knowledge has a much greater chance of finding Opal.  It would not be necessary to come upon it by chance. If one found sandstone then levels would be looked for, then rising levels, then slides and the greatest thing of all two slides crossing at an angle. A slide could be up to 100 meters long and the run of opal could be in straight line along this to a width of up to 15 meters, but usually much less.” – Dr. Archie Kalokerinos

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