dar es salaam tanzanian prosecutors charge two government officials friday economic sabotage accuse undervalue export-bound consignment diamonds seize mine majority own london-listed petra diamonds archard kalugendo director state-run diamond gemstone valuation unit government gemstone valuer edward rweyemamu jointly charge responsible 1.1 million lose tax revenue court case late twist government crackdown minerals industry year president john magufuli accuse sector give government fair share tanzania mineral wealth kalugendo 49 rweyemamu 50 employees ministry energy minerals allow enter pleas kisutu resident magistrate court tanzania commercial capital dar es salaam lawyers say two officials enter pleas case transfer high court jurisdiction hear economic sabotage trials accuse deny bail hold remand next hear sept. 29. pair face maximum jail term 20 years find guilty diamonds seize export antwerp belgium tanzania main airport dar es salaam aug. 31. petra diamonds say monday halt operations williamson mine government seize diamonds question employees petra own 75 percent mine tanzanian government hold remain share petra deny under-declares diamond export say follow government laws procedures business government say nationalize diamonds value put 29.5 million twice provisional value approve two government officials charge court government disclose come 29.5 million valuation magufuli order examination export individual company parliamentary investigation find country diamonds precious gemstone export under-declared mine account percent tanzania gdp tanzania charge officials economic sabotage seize diamonds