AN article written in French from our colleagues in the French Gemmological Association
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Paul Downings article on Ethiopian Opal
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A journal article from Gems and Gemmology on the occurrence of Precious opal in Ethiopia
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AN article regarding the special digit patterns in Ethiopian Gem opal
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An excerpt of the history of White Cliffs
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The White Cliffs Royal Commission
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Quarterly Notes NSW Geological Survey-White CLiffs
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A view of the town of White Cliffs
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Daniela L’Abbate, specialist opal carver.
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Information and procedures for valuing carved opal
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An extract of the chapters relating to opal
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A discussion paper form Bruce Dickson regarding trace elements in Australian black opal
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Boris Chauvire and colleagues elucidate some information regarding opal cracking
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An updated article regarding Slovakian Precious opal jewellery
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A discussion on the porosity of siliceous materials including opal
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A discussion from the Australian Gemmologist regarding opal cracking
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An historical discussion of the geology and occurrence of opal at Lightning Ridge
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An analysis of opal polymorphs by NMR
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