Black Opal, Boulder Opal and White Opal deposits in Australia
Australia’s Great Artesian Basin (GSB) hosts widespread deposits of Opal, and continue to be the major source of high-quality gem opal for the international coloured gemstone market. Opal mining in the GAB has produce billions of dollars’ worth of exquisite gems, including light opal mainly found in the opal fields of South Australia, Boulder Opal…