In this Article, Neville Curtis and his colleagues discuss new information regarding the mineralogical varieties of opal
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A micrograph of the pattern so called “lizard skin” of synthetic and imitation opal
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Trace Elements - 1
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the following document is an extract of the opal pages from Dana’s Mineralogy
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The article in this issue of the Australian Gemmologist was for its time a ”land breaking” discussion on opal nomenclature.
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The article in this issue of the Australian Gemmologist was for its time a ”land breaking” discussion on opal nomenclature.
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The photo is provided from the Sherman Archives, a wider view shows the township of White Cliffs in NSW in 1906. The text excerpt in this post is from the NSW Department of Mines, Technical Reports Volume 7 1959 and discusses the occurrence of opal in White Cliffs written by R. E. Relph.
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Anne of Geirstein, one of the Waverley novels written by Sir Walter Scott is also known or titled as “The maiden of the mist” had profound influence on precious opal at the time.
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The world of opal written by Allan Ekert and published in 1997 by John Wiley and Sons, Inc. ISBN 0-471-13397-3 contains a wonderful Appendix of a Glossary of opal terms.
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