RAPAPORT... Johnny Velloza is set to leave Gem Diamonds, two monthsafter his promotion to deputy CEO and chief operating officer. Velloza will step down on September 15 to become jointCEO of a copper and cobalt company, the miner said Thursday. Gem Diamonds is currently searching for his successor. In theinterim, Gavin Beevers will join the miner as technical adviser on July 1 foran as-yet-undetermined period. The former De Beers technical director has beena member of Gem Diamonds' board for the past 10 years. Velloza will still join Gem Diamonds' board on July 1 in anexecutive capacity, as planned, and will become a non-executive director after heleaves the company.