Independent valuation of Rockwell Diamonds confirms significant upside potential for shares and provides update on private placement

VANCOUVER, July 20, 2011 /PRNewswire/ - Rockwell Diamonds Inc. ("Rockwell" or the "Company") (TSX: RDI) (JSE: RDI) (OTCBB: RDIAF) announces the results of an independent valuation of the Company and the support of a key strategic shareholder in the current private placement. The valuation, date