EVALUATION OF CARVED LIGHTNING RIDGE BLACK OPAL
A discussion paper originally written for the valuer’s in Australia
The picture to the left is a carving known as Boat on Sandstone an is an artistically abstract freeform black opal carving of seam opal . Originating from the Mulga field, gGawin in the Lightning ridge district, Carved by Christine Roussel.
A journal article from Gems and Gemmology on the occurrence of Precious opal in Ethiopia
In this Article, Neville Curtis and his colleagues discuss new information regarding the mineralogical varieties of opal
The article in this issue of the Australian Gemmologist was for its time a ”land breaking” discussion on opal nomenclature.
The article in this issue of the Australian Gemmologist was for its time a ”land breaking” discussion on opal nomenclature.