2010 Tania R Marshall Explorations Unlimited Glenn A Norton Rockwell Diamonds Inc REVISED TECHNICAL REPORT ON THE TIRISANO ALLUVIAL DIAMOND PROJECT, (INCORPORATING THE NOOITGEDACHT 131, HARTBEESTLAAGTE 146 AND ZWARTRAND 145 PROPERTIES), VENTERSDORP DISTRICT, REPUBLIC OF SOUTH AFRICA, FOR ROCKWELL DIAMONDS INC, Effective Date: 30 November, 2010 Signature Date: 30 May 2011 Revision Date: 25 July 2011 ROCKWELL DIAMONDS INC, TIRISANO MINE November 30, 2010 Table of Contents Page EXECUTIVE SUMMARY .......................................................................................................................................... 8 1 INTRODUCTION ........................................................................................................................................... 14 1.1 TERMS OF REFERENCE AND SCOPE OF WORK ....................................................................................................... 14 1.2 SOURCES OF INFORMATION .............................................................................................................................. 17 1.3 UNITS AND CURRENCY .................................................................................................................................... 17 1.4 FIELD INVOLVEMENT OF QUALIFIED PERSONS ...................................................................................................... 17 1.5 USE OF DATA ................................................................................................................................................ 18 2 RELIANCE ON OTHER EXPERTS ..................................................................................................................... 19 2.1 LEGAL OPINION ............................................................................................................................................. 19 2.2 ENVIRONMENTAL ........................................................................................................................................... 19 2.3 DIAMOND VALUATION .................................................................................................................................... 19 3 PROPERTY DESCRIPTION AND LOCATION .................................................................................................... 20 3.1 PROPERTY DESCRIPTION AND LOCATION .............................................................................................................. 20 3.2 PERMITS CONTRACTS AND AGREEMENTS ............................................................................................................. 21 3.2.1 Surface ownership / land use rights ...................................................................................................... 21 3.2.2 Mineral rights (Mining/Prospecting Rights, permits, etc) ..................................................................... 21 3.2.2.1 Royalty Payments .......................................................................................................................................... 23 3.3 BEE COMPLIANCE .......................................................................................................................................... 23 3.4 ENVIRONMENTAL ........................................................................................................................................... 23 3.4.1 Environmental Rehabilitation ............................................................................................................... 23 3.4.2 Water permits ....................................................................................................................................... 25 4 ACCESSIBILITY, CLIMATE, LOCAL RESOURCES, INFRASTRUCTURE AND PHYSIOGRAPHY .............................. 26 4.1 TOPOGRAPHY, ELEVATION AND VEGETATION ........................................................................................................ 26 4.2 DRAINAGE .................................................................................................................................................... 27 4.3 ACCESS AND INFRASTRUCTURE .......................................................................................................................... 27 4.4 CLIMATE ....................................................................................................................................................... 28 5 HISTORY ...................................................................................................................................................... 29 5.1 PREVIOUS OWNERSHIP .................................................................................................................................... 29 5.2 PREVIOUS EXPLORATION/DEVELOPMENT ............................................................................................................ 29 5.2.1 Historical ............................................................................................................................................... 29 5.2.2 Etruscan Resources (Pty) Ltd ................................................................................................................. 32 5.2.2.1 Etruscan Mvelaphanda Joint Venture ........................................................................................................... 34 5.2.2.2 Etruscan Diamonds (Pty) Ltd ......................................................................................................................... 34 6 GEOLOGICAL SETTING ................................................................................................................................. 40 6.1 GENERAL GEOLOGY AND MINERAL DEPOSITS OF SOUTH AFRICA ............................................................................. 40 6.2 THE ALLUVIAL DIAMOND FIELDS OF THE NORTH WEST PROVINCE ........................................................................... 41 6.2.1 Morphotectonic Model ......................................................................................................................... 42 6.3 PROPERTY GEOLOGY ....................................................................................................................................... 48 7 DEPOSIT TYPES ............................................................................................................................................ 51 8 MINERALIZATION ........................................................................................................................................ 56 8.1 NATURE OF MINERALISATION ........................................................................................................................... 56 8.2 SURROUNDING ROCK TYPES/REGIONAL BEDROCK GEOLOGY .................................................................................. 57 8.2.1 Post-Gondwana Geomorphology .......................................................................................................... 59 8.3 GEOLOGICAL CONTROLS .................................................................................................................................. 60 8.4 MINERALISATION ON TIRISANO MINE ................................................................................................................ 62 Page 2 ROCKWELL DIAMONDS INC, TIRISANO MINE November 30, 2010 9 EXPLORATION ............................................................................................................................................. 63 9.1 REMOTE SENSING (SATELLITE IMAGERY / AERIAL PHOTO INTERPRETATION) ............................................................... 63 9.2 GEOPHYSICS .................................................................................................................................................. 63 10 DRILLING ..................................................................................................................................................... 69 10.1 DRILLING PROCEDURES AND PROTOCOLS ............................................................................................................ 69 10.2 LOCATION ..................................................................................................................................................... 70 10.3 RESULTS ....................................................................................................................................................... 73 10.3.1 Volume Estimation ........................................................................................................................... 74 10.4 LIMITATIONS OF THE DRILLING PROGRAMME ........................................................................................................ 75 10.5 REPRESENTATIVENESS ..................................................................................................................................... 75 11 SAMPLING METHOD AND APPROACH ......................................................................................................... 76 11.1 DRILLING, SAMPLING AND RECOVERY FACTORS ..................................................................................................... 76 11.2 REPRESENTATIVENESS ..................................................................................................................................... 77 12 SAMPLE PREPARATION, ANALYSES AND SECURITY .....................................................................................