Tanzania to Nationalise Seized Petra Gems Reuters Natural Resources, Illicit Wealth Tanzania said on Saturday it planned to nationalise diamonds whose value it put at $29.5 million belonging to a mine majority owned by London-listed Petra Diamonds after it accused the miner of under-declaring its mineral exports. The diamonds were seized at the main airport in Tanzania’s commercial capital Dar es Salaam on August 31 as they were being exported by Williamson Diamonds Ltd to Antwerp, Belgium. United Kingdom Reuters 2017 2017 Text 2p. iffoadatabase.trustafrica.org/iff/Tanzania_to_nationalise_seized_Petra_gems.pdf