The world’s first recorded opalised pearls, relics of creatures in an ancient inland sea dating back 65 million years, have been unearthed by two miners in the South Australian outback. The “priceless” four-millimetre specimens were found in the Coober Pedy opal fields, an area famed for the colourful gems. Dr Ben Grguric from the SA … Continue reading The World’s First Recorded Opalised Pearls Discovered