May 23 (Reuters) - Riozim Ltd RTNR.ZI
* Relationship between RioZim and Murowa Diamonds has not changed as a result of Rio Tinto (LON:RIO) Plc's sale of its interests in Zimbabwe last year
* RioZim's shareholding in Murowa remained unaffected by the transaction at 22.2% Source text Further company coverage: RTNR.ZI