Zambia’s company registry reversed a decision to strip Israeli diamond billionaire Lev Leviev of his 50% stake in an emerald mine that’s at the heart of a $50-million dispute. The Patent and Companies Registration Agency, or Pacra, said in a letter on Thursday that it reversed the forfeiture of the shares Leviev held in Gemcanton Investments Holdings through his local unit. The letter came a day after Leviev’s lawyer, Dickson Jere, threatened to institute legal and criminal proceedings following changes to Gemcanton’s shareholding on December 31.