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August 21, 2018The Great Opal Gemstones of Coober Pedy2 minutesPlayA small town in Australia is home to approximately seventy percent of the world's opals....moreShareView all episodesBy A Moment of Science (amomentofscience.org)August 21, 2018The Great Opal Gemstones of Coober Pedy2 minutesPlayA small town in Australia is home to approximately seventy percent of the world's opals....more
August 21, 2018The Great Opal Gemstones of Coober Pedy2 minutesPlayA small town in Australia is home to approximately seventy percent of the world's opals....more