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07-31-2017, 07:15 PM
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Researchers unearth 'tectonic events' that formed Canadian sapphires
 Treasure-hunting Canadian Researchers say they have figured out how to find sapphire deposits by identifying the exact sequence of geologic events that create the sparkling gemstone.أكثر... ??????? ??????: Researchers unearth 'tectonic events' that formed Canadian sapphires || ??????: ahlam1399 || ??????: اسم منتداك
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