Fractured Dolerite pounding ball at the 'Unfinished Obelisk' quarry in Aswan
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Fractured Dolerite pounding ball at the 'Unfinished Obelisk' quarry in Aswan
Dolerite is a very hard igneous rock. It was used by the Egyptians at Aswan in pounding balls of up to 5 kilos or more to shape the stone they were extracting from the quarry.