Reshaping the Landscape: Understanding GIA’s Evolving Gia Grading of Lab Grown Diamonds The Gemological Institute of America (GIA), long recognized as the global standard-bearer for diamond grading, is implementing a significant shift in its approach to the Grading of Lab … Continued
A PROSPECTORS GUIDE TO OPAL IN WESTERN QUEENSLAND 1966 The following- article has been compiled by T. H. Connah, M.Sc., Senior Geologist, Geological Survey of Queensland, from published and unpublished reports on the Opal areas of Western Queensland by officers … Continued
A NEW UNDERSTANDING OF HOW SEAM OPAL IS MADE IN NATURE is Published with permission of the author, Gerard Faber, Mining Consultant The silica source for the opal is from Diatoms. The acid rain leached the silica from the Diatoms. … Continued
A news article from The Capricornian regarding events at Opalton in 1898 [FROM OUR OWN CORRESPONDENT] Mining activities are currently experiencing a downturn due to recent heavy rains causing the flooding of several shafts in the deeper grounds. However, … Continued