opal mining the australian outback |
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| navigate by keyword : amorphaus area australia community coober crystal crystals earth earthhills ecological ecosystem extraction famous gem gems geological geology heap highway hill hills holes kupipiti load materials mine minerals miners mines molehill molehills northern opal opals pedy photogenic pile sand sandhill silica south stuart town valuable value wildfire xeric |
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| The colourful earth hills around the Australian outback opal mining town of Coober Pedy in South Australia |
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