International Colored Gemstone Association

Frozen Opal Fluids and Colloidal Crystal Fire: Gem Opal Deposits in the Heart of Australia, By Dr. Simon R. Pecover InColor magazine Winter 2019 (Issue 41, pg.36) Gem opal continues to be mined in Australia from numerous deposits occurring in the states of South Australia, New South Wales and Queensland. These opal deposits mainly occur within two Cretaceous sedimentary basins. These include the large Eromanga Basin and the much smaller Surat Basin. Together these basins comp...rise the bulk of Australia’s famous Great Artesian Basin. Photo: Close-ups of prismatic photonic colloidal crystals of precious opal in Lightning Ridge vein opal Courtesy Dr. Simon R. Pecover and Seda Opals @sedaopals http://www.incolormagazine.org/books/xqnc/#p=36

Members of the International Colored Gemstone Association will, at all times, protect the welfare of their clients and all parties involved, represent the products in an honest manner, promote natural colored gemstones in a positive way, and strive to enhance the high degree of professionalism existing within the industry. Learn more here: https://www.gemstone.org/

Members who undertake this process will understand their duty of care within the supply chain Learn more here: https://www.gemstone.org/ethical-accreditation-aem