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HandBk 005 - Opal: South Australia's Gemstone. Barnes L.C. et al. (1992 revised edition)
South Australia's famous desert opalfields supply about 80% of the world output of precious opal, with current production coming almost entirely from the major fields at Andamooka, Coober Pedy and Mintabie, each of which is expected to increase output...-
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ExpNotes ABMINGA: Explanatory Notes ABMINGA
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