AMIS0416 Certified Reference Material. Certificate of Analysis

Tel: +27 (0) 11 923 0800 Fax: +27 (0) 11 392 4715 web: www.amis.co.za 11 Gewel Street (off Hulley Road), D1 Isando Business Park, Kempton Park, 1609 P.O. Box 856, Isando, 1600, Gauteng, South Africa, a division of the Set Point Group AMIS0416 Certified Reference Material Platinum (PGM) UG2 Ore Bushveld Complex, South Africa Certificate of Analysis Recommended Concentrations and Limits 1. (at two Standard Deviations) Certified Concentrations 2. Pd NIS 0.80 ± 0.06 g/t Ru NiS 0.68 ± 0.08 g/t Cr XRF 19.28 ± 0.34 % Cu M/ICP 93 ± 11 ppm Cu P 97 ± 12 ppm Ni P 202 ± 22 ppm Ni XRF 1099 ± 109 ppm Specific Gravity 3.85 ± 0.08 Provisional Concentrations Pt Pb Collection 1.46 ± 0.18 g/t Pd Pb Collection 0.75 ± 0.12 g/t Au Pb Collection 0.14 ± 0.04 g/t Pt NIS 1.54 ± 0.24 g/t Au NIS 0.13 ± 0.04 g/t Ir NiS 0.13 ± 0.02 g/t Rh 0.29 ± 0.04 g/t Co M/ICP 247 ± 49 ppm Co P 50 ± 12 ppm Ni M/ICP 1094 ± 148 ppm 4E (Pt, Pd, Au (all NiS) + Rh) = 2.76 g/t 1. Manufacturers recommended limits for use of the material as control samples, based on two standard deviations, calculated using Between Laboratory statistics for treatment of the data for trivial, nontrivial and technically invalid results. See sections 1, 9 and 12. 2. There is additional certified major element data presented on p2 and uncertified trace element data presented as an appendix. Directors: GJ Horsfield (CEO), MD Evers (CFO)(British), A Buddingh, W Erasmus, Gerber, SJ Ingram M McWha, N Robinson, V Singh, MH Snelling, D Steenkamp (Alt), J Vassiloudis

Major Element Recommended Concentrations and Limits (at two Standard Deviations) Certified Concentrations Al2O3 13.59 ± 0.22 % CaO 2.54 ± 0.04 % Cr2O3 28.18 ± 0.42 % Fe2O3 22.71 ± 0.26 % K2O 0.19 ± 0.02 % MgO 11.88 ± 0.14 % MnO 0.24 ± 0.01 % SiO2 19.34 ± 0.34 % TiO2 0.69 ± 0.02 % Provisional Concentration Na2O 0.31 ± 0.04 % 1. Intended Use: AMIS0416 is a certified reference material which may be used to demonstrate the validity of measurement results of a single analysis of PGE, Cu and Ni ore materials; derived from the UG2 Reef; or from other mafic rocks with a similar grade and matrix. It is a matrix matched Certified Reference Material fit for use as control samples in routine assay laboratory quality control; when inserted within runs of samples and measured in parallel to the unknown. Its purpose is to monitor inter-laboratory or instrument bias and within lab precision. It can be used, indirectly, to establish the traceability of results to an SI system of units. The recommended concentrations and limits for this material are property values based on a measurement campaign (round robin) and reflect consensus results from the laboratories that participated in the round robin. Slight variations in analytical procedures between laboratories will reflect as slight biases to the recommended concentrations (see 19). Good laboratories will report results within the two standard deviation levels with a failure rate of <10 %. The material can also be used for method development and for the calibration of equipment. 2. Origin of Material: This standard was made using Pt/Pd UG2 rich chromitite material supplied by Anglo Platinum Limited from the Western limb of the Bushveld Complex. 3. Mineral and Chemical Composition: The UG2 chromitite ore consists of fine to medium size cumulus chromite grains with substantial amounts of post-cumulus orthopyroxene crystals. The footwall is a coarse grained pegmatoidal pyroxenite with sporadic occurrences of chromitite blebs, lenses and stringers. The hanging wall is predominantly fine to medium grained orthopyroxenite with three or more chromitite stringers referred to as the UG2 leaders. The concentrates produced have had most of the chromitite and some of the silicates removed Major element chemistry data from thirteen of the labs has been compiled and certified. Uncertified summary statistics for trace element data are set out in the appendix. 4. Appearance: The material is a very fine powder. It is colored a Medium Dark Grey (Corstor Colour Gauge). 2

5. Handling instructions: The material is packaged in Laboratory Packs and Explorer Packs that must be shaken or otherwise agitated before use. Normal safety precautions for handling fine particulate matter are suggested, such as the use of safety glasses, breathing protection, gloves and a laboratory coat. 6. Method of Preparation: The material was crushed, dry-milled and air-classified to <54um. Wet sieve particle size analysis of random samples confirmed the material was 98.5% <54um. It was then blended in a bi-conical mixer, systematically divided and then sealed into 1kg Laboratory Packs. Explorer Packs are subdivided from the Laboratory packs as required. Samples were randomly selected for homogeneity testing and third party analysis. Statistical analysis of both homogeneity and the consensus test results were carried out by independent statisticians. 7. Methods of Analysis requested: 1. Pt, Pd and Au. ICP-OES or ICP-MS, Pb collection with Ag as a co-collector. 2. Au, Pt, Pd, Rh, Ru and Ir. ICP-MS, nickel sulphide collection. 3. Co, Cu and Ni. Multi-acid total digestion, including HF, with ICP-OES finish. 4. Co, Cu and Ni. Aqua regia digestion with ICP-OES finish. 5. Cr, Co, Cu and Ni. Pressed pellet XRF. 6. S by LECO 7. Specific Gravity. Gas pycnometer. 8. XRF (major elements). 9. Multi acid digest ICP scan trace elements. Additionally, XRF analyses were requested for the major elements and a multi-element multi acid digest and ICP scan was requested for the trace elements. 8. Information requested: 1. Aliquots used for all determinations. 2. Results for individual PGM's reported in ppb. 3. Results for base metals reported in ppm. 4. QC data, to include replicates, blanks and certified reference materials used. 5. Analytical techniques used. 9. Method of Certification: Twenty eight laboratories were each given eight randomly selected packages of sample. Twenty four of the laboratories submitted results in time for the certification. Final limits were calculated after first determining if all data was compatible within a spread normally expected for similar analytical methods done by reputable laboratories. Data from any one laboratory was then removed from further calculations when the mean of all analyses from that laboratory failed a t test of the global means of the other laboratories. The means and standard deviations were then recalculated using all remaining data. Any analysis that fell outside of the new two standard deviations was removed from the ensuing data base. The mean and standard deviations were again calculated using the remaining data. The between-laboratory standard deviation is used in the calculation to eliminate technically and statistically invalid data. Upper and lower limits are based on the standard deviation of the remaining data, which reflect individual analyses and can be used to monitor accuracy in routine laboratory quality control. This is different to limits based on standard deviations derived from grouped set of analyses (see 12), which provide important measures for precision and trueness, but which are less useful for routine QC. Standards with an RSD of near or less than 5 % are termed Certified, RSD s of between near 5 % and 15 % are termed Provisional, and RSD s over 15 % are termed Informational. 3

10. Participating Laboratories: The 24 out of 28 laboratories that provided results timeously were (not in same order as in the table of assays): 1 Activation Laboratories Pty Ltd (ActLabs) CA 2 ALS Ammtec (Australia) 3 ALS Chemex Laboratory Group Johannesburg SA 4 ALS Chemex Laboratory Group Perth WA 5 ALS Chemex Laboratory Group Vancouver CA 6 ALS OMAC (Ireland) 7 Anglo Platinum - Eastern Bushveld Regional Laboratory 8 Genalysis Laboratory Services (South Africa) Pty 9 Genalysis Laboratory Services (W Australia P) 10 GNK Laboratories (Pvt) Ltd 11 Intertek Utama Services (Indonesia) 12 Labtium Inc Finland 13 Mintek (South Africa) 14 Nkomati JV Laboratory SA 15 Performance Laboratories SA (Randfontein) 16 Set Point Laboratories (Isando) SA 17 SGS Australia Pty Ltd (Newburn) WA 18 SGS Geosol Laboratories Ltda (Brazil) 19 SGS Mineral Services Lakefield (Canada) 20 SGS South Africa (Pty) Ltd - Booysens JHB 21 SGS Vancouver (Canada) 22 Ultra Trace (Pty) Ltd WA 23 Xstrata Alloys 24 Zimplats Head Office Assay Laboratory 11. Assay Data: Data as received from the laboratories for the important certified elements listed on p1 are set out below. A proficiency report has been sent to the managers of the participating laboratories. Additional digital data from this round robin is available on request. Economic element data Lab Pt Pd Au Pt Pd Au Ir Rh Ru Co Co Co Cr Cr Cu Cu Cu Ni Ni Ni Code Pb Coll Pb Coll Pb Coll NIS NIS NIS NiS NiS M/ICP P XRF M/ICP XRF M/ICP P XRF M/ICP P XRF g/t g/t g/t g/t g/t g/t g/t g/t g/t ppm ppm ppm % % ppm ppm ppm ppm ppm ppm A 1.51 0.85 0.16 0.28 130 1055 A 1.39 0.81 0.16 0.20 130 1055 A 1.49 0.84 0.17 0.22 120 1020 A 1.50 0.84 0.17 0.20 125 1035 A 1.44 0.83 0.19 0.23 125 1025 A 1.46 0.83 0.14 0.21 130 1035 A 1.51 0.81 0.17 0.22 125 1000 A 1.36 0.80 0.15 0.20 130 1000 B 1.57 0.81 0.14 240 50.00 90.00 110.00 1110 220 B 1.64 0.81 0.11 250 60.00 90.00 90.00 1130 220 B 1.55 0.79 0.13 250 60.00 90.00 90.00 1130 220 B 1.46 0.74 0.14 260 60.00 90.00 90.00 1130 200 B 1.45 0.74 0.13 250 60.00 110.00 90.00 1120 210 B 1.52 0.77 0.14 260 60.00 90.00 90.00 1140 220 B 1.51 0.80 0.12 260 50.00 90.00 80.00 1120 200 B 1.59 0.80 0.12 260 50.00 90.00 90.00 1140 200 D 1.43 0.75 0.13 0.12 0.29 0.67 269 103.00 1092 D 1.42 0.79 0.13 0.12 0.29 0.66 259 106.00 1051 D 1.43 0.76 0.13 0.12 0.30 0.66 250 91.00 1008 D 1.38 0.79 0.14 0.12 0.29 0.67 256 95.00 1040 D 1.46 0.79 0.15 0.12 0.30 0.67 262 91.00 1063 D 1.39 0.78 0.13 0.12 0.30 0.67 264 91.00 1079 D 1.44 0.77 0.15 0.12 0.30 0.69 263 95.00 1079 D 1.44 0.75 0.15 0.12 0.30 0.65 246 95.00 996 E 1.50 0.73 0.11 0.14 0.29 0.64 200 14.60 1000 E 1.53 0.77 0.12 0.13 0.30 0.75 200 14.80 1000 E 1.49 0.76 0.17 0.13 0.30 0.64 200 14.70 1100 E 1.43 0.73 0.17 0.13 0.30 0.71 200 14.50 1100 E 1.49 0.75 0.17 0.13 0.30 0.70 200 14.40 1000 E 1.53 0.75 0.14 0.14 0.31 0.74 200 14.60 1100 E 1.44 0.72 0.12 0.14 0.31 0.72 200 14.80 1100 E 1.53 0.74 0.10 0.14 0.31 0.75 200 14.60 1000 G 191 53.00 86.80 97.20 978 198 G 207 54.00 95.00 97.20 1020 198 G 198 52.00 94.30 97.10 994 197 G 197 49.00 89.60 95.90 973 193 G 190 50.00 94.60 96.10 995 198 G 195 53.00 96.00 98.00 966 197 G 196 50.00 92.10 94.80 980 195 G 200 58.00 89.10 102.00 979 196 4

Economic element data (cont) Lab Pt Pd Au Pt Pd Au Ir Rh Ru Co Co Co Cr Cr Cu Cu Cu Ni Ni Ni Code Pb Coll Pb Coll Pb Coll NIS NIS NIS NiS NiS M/ICP P XRF M/ICP XRF M/ICP P XRF M/ICP P XRF g/t g/t g/t g/t g/t g/t g/t g/t g/t ppm ppm ppm % % ppm ppm ppm ppm ppm ppm H 1.70 0.83 0.14 0.17 0.31 0.72 H 1.68 0.84 0.14 0.18 0.30 0.72 H 1.66 0.83 0.13 0.17 0.31 0.72 H 1.70 0.83 0.12 0.17 0.30 0.71 H 1.69 0.82 0.14 0.18 0.30 0.71 H 1.68 0.83 0.12 0.18 0.30 0.72 H 1.70 0.80 0.14 0.18 0.30 0.72 H 1.70 0.82 0.13 0.17 0.32 0.71 I 1.51 0.68 0.20 19.43 I 1.63 0.71 0.17 19.23 I 1.66 0.65 0.16 19.36 I 1.56 0.65 0.20 19.43 I 1.72 0.64 0.17 19.36 I 1.56 0.65 0.15 19.36 I 1.58 0.67 0.15 19.43 I 1.61 0.66 0.15 19.50 K 1.62 0.82 0.11 0.14 0.25 0.63 260 80.00 1160 K 1.60 0.82 0.11 0.14 0.25 0.62 270 90.00 1190 K 1.62 0.84 0.12 0.14 0.26 0.66 270 90.00 1190 K 1.64 0.82 0.12 0.14 0.26 0.65 250 90.00 1170 K 1.65 0.85 0.13 0.15 0.26 0.67 260 80.00 1160 K 1.52 0.79 0.13 0.14 0.25 0.62 260 80.00 1180 K 1.56 0.82 0.12 0.14 0.25 0.64 260 90.00 1180 K 1.63 0.85 0.13 0.14 0.26 0.68 270 100.00 1160 L 1.43 0.75 0.15 1.38 0.80 0.11 0.13 0.29 0.71 248 49.12 212.00 86.15 104 92.00 859 189 1087 L 1.43 0.76 0.15 1.37 0.80 0.09 0.13 0.27 0.70 261 47.69 243.00 87.05 104 89.00 939 185 1080 L 1.40 0.75 0.13 1.35 0.80 0.10 0.13 0.27 0.71 226 46.42 224.00 85.63 104 90.00 892 185 1089 L 1.42 0.80 0.14 1.36 0.79 0.11 0.13 0.28 0.70 210 47.43 217.00 89.36 105 93.00 881 183 1096 L 1.43 0.76 0.14 1.34 0.77 0.09 0.12 0.27 0.68 214 46.95 244.00 87.74 105 96.00 901 183 1086 L 1.44 0.75 0.13 1.34 0.77 0.09 0.12 0.27 0.69 200 46.84 226.00 88.24 104 101.00 867 175 1076 L 1.43 0.78 0.13 1.34 0.77 0.09 0.13 0.27 0.68 281 44.87 235.00 86.20 102 105.00 962 179 1088 L 1.43 0.75 0.13 1.35 0.77 0.10 0.12 0.27 0.68 281 46.35 231.00 86.71 104 104.00 955 178 1092 M 1.40 0.74 0.14 19.25 103.00 853 M 1.50 0.79 0.15 19.16 99.00 864 M 1.40 0.75 0.14 19.17 97.00 895 M 1.50 0.79 0.16 19.27 99.00 867 M 1.40 0.81 0.15 19.22 100.00 872 M 1.50 0.81 0.15 19.23 98.00 883 M 1.34 0.69 0.13 19.16 100.00 876 M 1.40 0.80 0.14 19.20 99.00 888 N 1.22 0.61 0.09 256 54.00 19.30 86.00 100.00 1120 199 N 1.15 0.58 0.10 252 50.00 19.20 86.00 98.00 1100 191 N 1.25 0.63 0.15 253 49.00 18.80 86.00 99.00 1120 196 N 1.35 0.66 0.11 259 51.00 18.80 84.00 100.00 1130 195 N 1.40 0.70 0.11 260 48.00 18.90 91.00 98.00 1120 196 N 1.33 0.66 0.10 252 50.00 18.80 86.00 100.00 1120 193 N 1.41 0.70 0.13 259 49.00 17.80 87.00 98.00 1140 197 N 1.40 0.69 0.14 261 49.00 18.70 89.00 99.00 1140 193 O 102.00 1163 O 96.00 1183 O 97.00 1153 O 105.00 1177 O 107.00 1173 O 93.00 1170 O 106.00 1111 O 99.00 1193 P 1.10 0.56 0.12 250 50.00 16.70 90.00 1160 200 P 1.37 0.71 0.12 250 50.00 16.75 110.00 90.00 1160 220 P 1.43 0.72 0.15 260 60.00 16.75 90.00 90.00 1160 220 P 1.46 0.74 0.16 250 70.00 16.55 90.00 90.00 1160 220 P 1.57 0.80 0.15 250 60.00 16.40 90.00 80.00 1120 190 P 1.21 0.53 0.10 260 60.00 16.95 90.00 90.00 1170 220 P 1.47 0.74 0.12 250 60.00 16.70 90.00 90.00 1160 220 P 1.32 0.66 0.12 260 60.00 17.00 90.00 90.00 1180 210 Q 1.60 0.85 0.14 1.47 0.79 0.13 0.12 0.30 0.61 270 46.00 19.30 19.29 100.00 96.00 1160 188 Q 1.52 0.81 0.13 1.46 0.82 0.14 0.11 0.30 0.63 255 45.00 18.90 19.29 95.00 93.00 1160 184 Q 1.54 0.80 0.14 1.59 0.86 0.13 0.13 0.32 0.66 260 50.00 19.10 19.23 95.00 97.00 1180 193 Q 1.52 0.79 0.15 1.63 0.83 0.13 0.13 0.31 0.64 255 49.00 19.20 19.23 100.00 95.00 1140 190 Q 1.60 0.83 0.14 1.54 0.79 0.14 0.12 0.29 0.58 270 53.00 19.10 19.29 100.00 95.00 1150 198 Q 1.62 0.85 0.17 1.56 0.80 0.15 0.13 0.30 0.60 250 47.00 19.00 19.29 100.00 93.00 1180 187 Q 1.62 0.85 0.16 1.58 0.84 0.15 0.12 0.31 0.63 255 48.00 19.20 19.29 100.00 95.00 1150 189 Q 1.60 0.84 0.13 1.60 0.80 0.14 0.13 0.30 0.63 255 50.00 19.10 19.29 90.00 94.00 1190 185 R 1.63 0.81 0.29 88.00 998 R 1.52 0.80 0.30 85.00 1071 R 1.29 0.67 0.23 85.00 1079 R 1.49 0.81 0.28 84.00 1088 R 1.72 0.81 0.29 91.00 1150 R 1.48 0.80 0.28 83.00 1042 R 1.53 0.65 0.23 91.00 1115 R 1.40 0.73 0.26 83.00 1071 S 1.23 0.69 0.14 257 53.90 94.20 106.50 1140 201 S 1.28 0.70 0.13 262 56.80 91.50 108.50 1150 210 S 1.24 0.63 0.14 265 58.90 89.10 108.50 1140 205 S 1.01 0.64 0.13 257 59.80 90.50 112.50 1110 213 S 0.97 0.49 0.08 265 56.30 90.50 108.00 1140 200 S 1.39 0.77 0.11 256 62.10 91.70 112.50 1120 207 S 1.06 0.78 0.16 258 58.20 87.10 108.00 1140 205 S 0.98 0.73 0.12 264 57.50 87.50 107.50 1150 198 T 1.35 0.72 0.12 225 47.00 19.29 101 98.00 1190 190 T 1.34 0.73 0.14 227 47.00 19.29 117 98.00 1170 193 T 1.40 0.68 0.13 233 46.00 19.29 107 93.00 1170 199 T 1.37 0.73 0.15 243 48.00 19.29 112 105.00 1200 203 T 1.37 0.74 0.14 226 45.00 19.29 114 101.00 1160 196 T 1.35 0.72 0.14 240 47.00 19.29 119 97.00 1210 204 T 1.37 0.72 0.14 223 47.00 19.29 116 100.00 1160 199 T 1.31 0.69 0.14 220 48.00 19.23 119 105.00 1160 204 U 1.41 0.74 0.17 U 1.43 0.74 0.15 U 1.38 0.73 0.16 U 1.41 0.76 0.16 U 1.41 0.74 0.15 U 1.53 0.80 0.17 U 1.47 0.78 0.15 U 1.36 0.72 0.16 5

Economical elements data (cont) Lab Pt Pd Au Pt Pd Au Ir Rh Ru Co Co Co Cr Cr Cu Cu Cu Ni Ni Ni Code Pb Coll Pb Coll Pb Coll NIS NIS NIS NiS NiS M/ICP P XRF M/ICP XRF M/ICP P XRF M/ICP P XRF g/t g/t g/t g/t g/t g/t g/t g/t g/t ppm ppm ppm % % ppm ppm ppm ppm ppm ppm V 200.00 19.80 1000 V 300.00 19.70 1100 V 400.00 19.40 1000 V 200.00 19.80 1000 V 200.00 19.50 1100 V 200.00 19.70 1000 V 300.00 19.70 1000 V 200.00 19.70 1100 W 40.00 19.11 96.00 W 40.00 19.25 94.00 W 39.00 19.22 93.00 W 39.00 19.33 93.00 W 38.00 19.40 94.00 W 38.00 19.12 95.00 W 39.00 19.56 93.00 W 39.00 19.51 95.00 X 1.46 0.46 0.41 101 41.97 472 X 1.30 0.64 0.21 157 67.38 448 X 1.57 0.70 0.24 112 56.02 455 X 1.38 0.69 0.41 87 36.34 494 X 1.22 0.87 0.47 100 42.14 431 X 1.30 0.64 0.22 99 47.51 439 X 1.38 0.64 0.33 104 49.78 392 X 1.46 0.64 0.32 116 54.70 443 Y 1.53 1.10 0.14 0.35 0.70 179 46.00 300.00 19.57 100 102.00 86.00 796 217 1135 Y 1.75 1.14 0.15 0.39 0.74 173 49.00 281.00 19.43 101 101.00 83.00 755 212 1140 Y 1.62 1.04 0.14 0.35 0.73 188 49.00 302.00 19.16 102 101.00 84.00 771 209 1132 Y 1.59 1.19 0.10 0.39 0.71 195 47.00 299.00 19.36 101 99.20 89.00 774 214 1120 Y 1.76 1.16 0.12 0.40 0.80 187 47.00 285.00 19.43 100 102.00 81.00 784 215 1126 Y 1.76 1.18 0.13 0.40 0.81 173 46.00 290.00 19.29 103 100.00 83.00 777 213 1121 Y 1.52 0.88 0.12 0.34 0.66 182 46.00 300.00 19.36 101 102.00 85.00 777 209 1129 Y 1.68 1.05 0.18 0.37 0.73 179 46.00 288.00 19.36 100 98.90 82.00 797 213 1135 ZA 1.50 0.77 0.13 1.40 0.81 0.13 0.12 0.29 0.63 272 34.00 19.13 101.00 90.00 1012 211 ZA 1.51 0.77 0.12 1.45 0.81 0.13 0.12 0.29 0.64 275 36.00 19.13 101.00 91.00 1009 212 ZA 1.52 0.79 0.12 1.46 0.81 0.13 0.12 0.30 0.66 272 33.00 19.18 101.00 92.00 1010 202 ZA 1.46 0.77 0.12 1.52 0.81 0.14 0.13 0.30 0.64 275 36.00 19.13 97.00 93.00 983 206 ZA 1.45 0.75 0.13 1.55 0.84 0.12 0.13 0.30 0.66 272 35.00 19.15 98.00 91.00 1011 211 ZA 1.45 0.76 0.13 1.45 0.82 0.16 0.12 0.30 0.66 272 35.00 19.15 99.00 91.00 1000 208 ZA 1.49 0.76 0.12 1.47 0.82 0.13 0.13 0.31 0.69 275 33.00 19.15 103.00 87.00 1018 200 ZA 1.51 0.77 0.13 1.55 0.84 0.16 0.13 0.30 0.69 273 33.00 19.20 99.00 89.00 1003 199 ZB 1.46 0.74 0.10 0.23 0.64 18.54 18.95 94.00 238 ZB 1.49 0.76 0.10 0.30 0.73 18.68 19.16 94.00 253 ZB 1.64 0.80 0.11 0.10 0.76 18.95 18.95 93.00 256 ZB 1.58 0.81 0.11 0.28 0.73 18.47 19.09 90.00 253 ZB 1.54 0.78 0.13 0.31 0.74 18.82 19.16 95.00 247 ZB 1.52 0.78 0.12 0.31 0.71 18.95 18.95 92.00 242 ZB 1.49 0.77 0.10 0.30 0.71 19.02 19.16 91.00 248 ZB 1.68 0.82 0.11 0.31 0.73 18.82 18.75 91.00 254 Major element data Lab Al2O3 CaO Cr2O3 Fe2O3 K2O MgO MnO Na2O SiO2 TiO2 S SG Code XRF XRF XRF XRF XRF XRF XRF XRF XRF XRF Comb/LECO pyc % % % % % % % % % % % B 13.80 2.53 22.74 0.18 11.60 0.21 0.29 19.25 0.68 3.87 B 13.80 2.53 22.75 0.18 11.60 0.22 0.29 19.30 0.68 3.88 B 13.75 2.51 22.65 0.18 11.55 0.21 0.29 19.05 0.69 3.96 B 13.80 2.53 22.74 0.18 11.60 0.21 0.29 19.20 0.69 3.97 B 13.90 2.55 22.77 0.18 11.75 0.22 0.29 19.35 0.69 3.87 B 13.75 2.53 22.78 0.18 11.60 0.22 0.29 19.20 0.69 3.84 B 13.85 2.54 22.88 0.18 11.55 0.22 0.29 19.55 0.69 3.87 B 13.85 2.53 22.64 0.18 11.70 0.21 0.29 19.30 0.70 3.91 D 3.65 D 3.69 D 3.64 D 3.72 D 3.55 D 3.64 D 3.63 D 3.65 G 0.03 3.82 G 0.04 3.82 G 0.03 3.80 G 0.03 3.81 G 0.03 3.80 G 0.03 3.79 G 0.03 3.79 G 0.03 3.78 6

Major element data (cont) Lab Al2O3 CaO Cr2O3 Fe2O3 K2O MgO MnO Na2O SiO2 TiO2 S SG Code XRF XRF XRF XRF XRF XRF XRF XRF XRF XRF Comb/LECO pyc % % % % % % % % % % % I 13.50 2.53 28.40 22.70 0.18 11.80 0.25 19.30 0.69 3.86 I 13.50 2.52 28.10 22.50 0.19 11.80 0.23 19.20 0.67 3.91 I 13.50 2.53 28.30 22.70 0.18 11.80 0.24 19.30 0.68 3.91 I 13.60 2.54 28.40 22.60 0.19 11.80 0.24 19.30 0.69 3.91 I 13.50 2.54 28.30 22.50 0.18 11.80 0.24 19.30 0.72 3.88 I 13.60 2.54 28.30 22.60 0.18 11.90 0.23 19.30 0.69 3.91 I 13.50 2.55 28.40 22.60 0.18 11.80 0.24 19.30 0.68 3.92 I 13.60 2.54 28.50 22.70 0.18 11.80 0.24 19.40 0.69 3.89 K 3.90 K 3.92 K 3.89 K 3.90 K 3.87 K 3.91 K 3.88 K 3.91 L 3.85 L 3.83 L 3.85 L 3.83 L 3.85 L 3.82 L 3.87 L 3.85 M 13.64 2.54 28.13 22.94 0.19 11.78 0.23 0.32 19.27 0.70 M 13.65 2.55 28.01 22.94 0.19 11.82 0.23 0.31 19.35 0.70 M 13.62 2.55 28.02 22.97 0.19 11.82 0.23 0.30 19.37 0.70 M 13.69 2.56 28.17 22.97 0.20 11.86 0.23 0.31 19.31 0.70 M 13.67 2.56 28.09 23.03 0.20 11.85 0.23 0.33 19.27 0.71 M 13.68 2.55 28.10 22.98 0.20 11.83 0.23 0.31 19.29 0.70 M 13.65 2.55 28.01 22.92 0.20 11.82 0.23 0.30 19.26 0.70 M 13.67 2.54 28.06 22.97 0.20 11.85 0.23 0.32 19.35 0.70 N 13.80 2.52 22.94 0.20 12.25 0.24 0.36 19.65 0.71 3.84 N 13.60 2.49 22.72 0.21 12.15 0.24 0.49 19.50 0.69 3.82 N 13.50 2.45 22.22 0.20 11.95 0.24 0.34 19.35 0.68 3.80 N 13.40 2.45 22.22 0.19 12.00 0.24 0.32 19.15 0.68 3.83 N 13.40 2.46 22.36 0.20 11.95 0.24 0.32 19.20 0.69 3.81 N 13.40 2.45 22.29 0.20 12.00 0.23 0.35 19.25 0.68 3.78 N 13.55 2.53 22.29 0.19 12.00 0.24 0.38 19.20 0.65 3.81 N 13.35 2.45 22.15 0.20 11.95 0.23 0.31 19.15 0.68 3.85 O 4.11 O 4.03 O 4.14 O 4.01 O 4.07 O 4.06 O 3.98 O 4.00 Q 13.50 2.60 28.20 22.70 0.22 11.90 0.24 19.50 0.70 3.89 Q 13.60 2.58 28.20 22.70 0.23 12.00 0.24 19.50 0.71 3.96 Q 13.50 2.60 28.10 22.60 0.24 11.90 0.24 19.60 0.70 3.91 Q 13.60 2.58 28.10 22.60 0.23 11.90 0.24 19.60 0.71 3.89 Q 13.50 2.58 28.20 22.60 0.23 11.90 0.24 19.60 0.71 3.89 Q 13.50 2.59 28.20 22.70 0.23 12.00 0.24 19.50 0.70 3.92 Q 13.60 2.59 28.20 22.70 0.23 11.90 0.24 19.50 0.69 3.96 Q 13.60 2.60 28.20 22.70 0.23 11.90 0.24 19.50 0.69 3.92 R 4.10 R 4.10 R 4.07 R 4.06 R 4.09 R 3.99 R 3.96 R 4.08 S 3.81 S 3.81 S 3.79 S 3.79 S 3.81 S 3.80 S 3.80 S 3.80 7

Major element data (cont) Lab Al2O3 CaO Cr2O3 Fe2O3 K2O MgO MnO Na2O SiO2 TiO2 S SG Code XRF XRF XRF XRF XRF XRF XRF XRF XRF XRF Comb/LECO pyc % % % % % % % % % % % T 13.60 2.52 28.20 22.60 0.18 11.80 0.23 0.26 19.30 0.70 0.02 T 13.50 2.52 28.20 22.60 0.18 11.80 0.25 0.28 19.30 0.70 0.02 T 13.60 2.51 28.20 22.60 0.18 11.80 0.23 0.27 19.20 0.70 0.03 T 13.50 2.54 28.20 22.70 0.19 11.80 0.24 0.27 19.30 0.69 0.03 T 13.50 2.52 28.20 22.70 0.18 11.80 0.24 0.27 19.30 0.69 0.02 T 13.60 2.52 28.20 22.70 0.18 11.80 0.24 0.27 19.30 0.71 0.02 T 13.60 2.52 28.20 22.60 0.19 11.80 0.24 0.27 19.30 0.70 0.03 T 13.60 2.52 28.10 22.60 0.18 11.80 0.24 0.29 19.20 0.70 0.03 V 2.51 28.77 22.60 0.20 11.91 0.24 0.35 19.59 0.69 V 2.50 28.20 22.85 0.20 11.63 0.25 0.33 19.33 0.67 V 2.52 28.66 22.47 0.21 11.90 0.24 0.32 19.39 0.69 V 2.45 28.50 22.45 0.22 11.78 0.23 0.32 19.35 0.69 V 2.56 28.61 22.73 0.21 12.10 0.25 0.33 19.70 0.70 V 2.54 28.77 22.53 0.20 12.07 0.24 0.34 19.53 0.70 V 2.56 28.50 22.75 0.21 12.00 0.25 0.32 19.75 0.70 V 2.62 28.63 22.77 0.22 12.04 0.24 0.35 19.76 0.71 Y 13.80 3.26 28.60 22.80 0.20 12.00 0.27 0.61 19.30 0.69 0.03 3.83 Y 13.40 2.80 28.40 22.60 0.20 11.90 0.28 0.37 19.00 0.68 0.03 3.84 Y 13.50 2.55 28.00 22.60 0.20 11.80 0.28 0.23 19.00 0.67 0.03 3.80 Y 13.60 3.19 28.30 22.70 0.20 11.90 0.26 0.32 19.10 0.70 0.03 3.84 Y 13.40 2.82 28.40 22.70 0.19 11.80 0.28 0.29 19.00 0.69 0.03 3.83 Y 13.80 2.93 28.20 22.50 0.22 11.90 0.27 0.28 19.40 0.68 0.03 3.84 Y 13.60 2.84 28.30 22.60 0.20 11.90 0.28 0.33 19.00 0.70 0.03 3.80 Y 13.60 2.52 28.30 22.60 0.20 11.90 0.27 0.23 18.80 0.69 0.03 3.83 ZA 13.61 2.55 27.97 22.79 0.20 11.84 0.24 0.29 19.50 0.70 0.04 3.97 ZA 13.57 2.55 27.96 22.71 0.19 11.88 0.24 0.32 19.44 0.70 0.04 3.78 ZA 13.65 2.54 28.03 22.83 0.20 11.83 0.24 0.32 19.40 0.70 0.04 3.95 ZA 13.60 2.57 27.96 22.77 0.20 11.91 0.24 0.29 19.64 0.70 0.04 3.81 ZA 13.52 2.55 27.99 22.76 0.20 11.87 0.24 0.33 19.46 0.70 0.04 3.88 ZA 13.58 2.54 27.99 22.81 0.20 11.88 0.24 0.30 19.40 0.70 0.04 3.92 ZA 13.58 2.54 28.00 22.74 0.20 11.85 0.24 0.29 19.65 0.71 0.03 3.91 ZA 13.63 2.55 28.06 22.86 0.20 11.87 0.24 0.31 19.48 0.71 0.04 3.94 ZB 27.70 24.40 18.60 3.82 ZB 28.00 24.70 19.40 3.82 ZB 27.70 24.50 19.20 3.85 ZB 27.90 24.50 18.80 3.83 ZB 28.00 24.60 18.40 3.84 ZB 27.70 24.30 18.30 3.83 ZB 28.00 24.70 18.70 3.83 ZB 27.40 24.10 18.10 3.82 12. Measurement of Uncertainty :(ref Dr Hugh Bartlett, Hugh Bartlett Consulting CC.) The samples used in this certification process have been selected in such a way as to represent the entire batch of material and were taken from the final packaged units; therefore all possible sources of uncertainty (sample uncertainty and measurement uncertainty) are included in the final combined standard uncertainty determination. The uncertainty measurement takes into consideration the between lab and the within lab variances and is calculated from the square roots of the variances of these components using the formula: Combined standard uncertainty=sqrt((between lab.var/no of labs) + ( mean square within lab.var /no of assays)) These uncertainty measurements may be used, by laboratories, as a component for calculating the total uncertainty for method validation according to the relevant ISO guidelines. 8

Analyte Method Unit S ' σl ² SW ³ CSU ⁴ Pt Pb Coll g/t 0.138 0.053 0.062 0.016 Pd Pb Coll g/t 0.075 0.038 0.035 0.011 Au Pb Coll g/t 0.058 0.009 0.015 0.003 Pt NIS g/t 0.120 0.151 0.053 0.062 Pd NIS g/t 0.105 0.030 0.018 0.014 Au NIS g/t 0.019 0.018 0.010 0.007 Ir NiS g/t 0.019 0.012 0.005 0.005 Rh g/t 0.045 0.021 0.008 0.008 Ru NiS g/t 0.046 0.035 0.024 0.013 Co M/ICP ppm 44.89 19.04 11.46 5.86 Co P ppm 7.748 5.119 2.781 1.649 Cr XRF % 0.285 0.231 0.114 0.089 Cu M/ICP ppm 16.04 3.966 2.617 1.225 Cu P ppm 6.63 4.43 2.86 1.44 Ni M/ICP ppm 255.7 56.6 23.98 16.51 Ni P ppm 11.47 9.27 6.17 3.17 Ni XRF ppm 54.6 60.8 33.0 27.7 Al 2 O 3 XRF % 0.123 0.076 0.090 0.031 CaO XRF % 0.138 0.028 0.012 0.011 Cr 2 O 3 XRF % 0.254 0.189 0.112 0.079 Fe 2 O 3 XRF % 0.574 0.119 0.084 0.046 K 2 O XRF % 0.016 0.011 0.005 0.004 MgO XRF % 0.129 0.063 0.071 0.025 MnO XRF % 0.015 0.004 0.004 0.002 Na 2 O XRF % 0.056 0.028 0.024 0.012 SiO 2 XRF % 0.298 0.120 0.117 0.045 TiO 2 XRF % 0.012 0.005 0.008 0.002 S Comb/LECO % 0.006 0.007 0.002 0.003 SG pyc 0.106 0.038 0.017 0.013 1. S - Std Dev for use on control charts. 2. σ L - Betw Lab Std Dev, for use to calculate a measure of accuracy. 3. S W - Within Lab Stc Dev, for use to calculate a measure of precision. 4. CSU - Combined Standard Uncertainty, a component for use to calculate the total uncertainty in method validation. 13. Certified values: The Certified, Provisional and Indicated values listed on p1 and p2 of this certificate fulfill the AMIS statistical criteria regarding agreement for certification and have been independently validated by Dr Barry Smee. 14. Metrological Traceability: The values quoted herein are based on the consensus values derived from statistical analysis of the data from an inter laboratory measurement program. Traceability to SI units is via the standards used by the individual laboratories the majority of which are accredited and who have maintained measurement traceability during the analytical process. 15. Certification: AMIS0416 is a new material. 16. Period of validity: The certified values are valid for this product, while still sealed in its original packaging, until notification to the contrary. The stability of the material will be subject to continuous testing for the duration of the inventory. Should product stability become an issue, all customers will be notified and notification to that effect will be placed on the www.amis.co.za website. 17. Minimum sample size: The majority of laboratories reporting used a 0.5g sample size for the ICP and a 30g sample size for the fire assay. These are the recommended minimum sample sizes for the use of this material. 9

18. Availability: This product is available in Laboratory Packs containing 1kg of material and Explorer Packs containing custom weights (from 50 to 250g) of material. The Laboratory Packs are sealed bottles delivered in sealed foil pouches. The Explorer Packs contain material in standard geochem envelopes, nitrogen flushed and vacuum sealed in foil pouches. 19. Recommended use: The data used to characterize this CRM has been scrutinized using outlier treatment techniques. This, together with the number of participating laboratories, should overcome any inter-laboratory issues and should lead to a very accurate measure for the given methods, notwithstanding the underlying assumption that what the good inter-laboratory labs reported was accurate. However an amount of bad data might have had an effect, resulting in limits which in some situations might be too broad for the effective monitoring of a single analytical method, laboratory or production process. Users should set their own limits based on their own data quality objectives and control measurements, after determining the performance characteristics of their own particular method, using a minimum of 20 analyses using this CRM. User set limits should normally be within the limits recommended on p1 and 2 of this certificate. 20. Legal Notice: This certificate and the reference material described in it have been prepared with due care and attention. However AMIS, Set Point Technology (Pty) Ltd, Mike McWha, Dr Barry Smee and Smee and Associates Ltd; accept no liability for any decisions or actions taken following the use of the reference material. 09 December 2013 Certifying Officers: African Mineral Standards: Mike McWha BSc (Hons), FGSSA, MAusIMM, Pr.Sci.Nat Geochemist: Barry W. Smee BSc, PhD, P.Geo, (B.C.) 10

Appendix uncertified trace element statistics Analyte Method Unit Mean 2SD RSD% n Ag M/ICP ppm 0.11 0.03 11.6 12 Al M/ICP % 7.2 0.39 2.8 61 As M/ICP ppm 4.5 1.5 16.6 22 Ba M/ICP ppm 41.7 2.7 3.2 39 Be M/ICP ppm 0.17 0.07 19.7 14 Bi M/ICP ppm 0.91 0.19 10.5 23 Ca M/ICP % 1.7 0.22 6.4 70 Cd M/ICP ppm 0.09 0.04 23.6 16 Ce M/ICP ppm 5.4 0.52 4.8 15 Co XRF ppm 251 82.3 16.4 23 Cr M/ICP % 17.7 3.7 10.3 40 Cs M/ICP ppm 0.60 0.02 1.8 21 Cu XRF ppm 91.8 16.4 8.9 32 Dy M/ICP ppm 0.49 0.06 6.5 8 Er M/ICP ppm 0.33 0.09 14.2 8 Eu M/ICP ppm 0.15 0.0 0.0 7 Fe M/ICP % 15.5 1.3 4.2 74 Ga M/ICP ppm 43.9 3.4 3.8 24 Gd M/ICP ppm 0.40 0.0 0.0 8 Ge M/ICP ppm 0.33 0.29 44.2 16 Hf M/ICP ppm 0.51 0.15 15.1 22 Ho M/ICP ppm 0.10 0.0 0.0 7 In M/ICP ppm 0.02 0.01 26.4 15 K M/ICP % 0.16 0.02 6.0 78 La M/ICP ppm 3.7 2.9 39.1 40 Li M/ICP ppm 5.7 0.84 7.4 55 Lu M/ICP ppm 0.06 0.0 0.0 7 Mg M/ICP % 6.7 0.77 5.7 79 Mn M/ICP ppm 1674 281 8.4 85 Mo M/ICP ppm 3.3 2.8 43.5 53 Na M/ICP % 0.22 0.02 5.0 71 Nb M/ICP ppm 1.2 0.39 16.6 24 Nd M/ICP ppm 2.4 0.15 3.1 8 P M/ICP ppm 102 20.3 9.9 53 Pb M/ICP ppm 9.5 3.7 19.5 41 Pr M/ICP ppm 0.64 0.03 2.2 8 Rb M/ICP ppm 7.6 1.6 10.4 24 S M/ICP % 0.03 0.01 11.1 60 Sb M/ICP ppm 36.9 4.1 5.6 24 Sc M/ICP ppm 10.7 1.4 6.4 79 Se M/ICP ppm 17.8 2.1 5.8 8 Si M/ICP % 9.0 0.33 1.8 23 Sm M/ICP ppm 0.48 0.05 5.6 8 Sn M/ICP ppm 0.77 0.12 7.7 15 Sr M/ICP ppm 51.7 5.1 4.9 64 Ta M/ICP ppm 0.11 0.06 27.6 16 Tb M/ICP ppm 0.07 0.02 14.3 8 Te M/ICP ppm 0.10 0.05 21.8 12 Th M/ICP ppm 0.63 0.08 6.7 22 Ti M/ICP % 0.35 0.08 11.2 64 Tl M/ICP ppm 0.05 0.01 12.5 11 U M/ICP ppm 18.3 8.8 23.9 30 V M/ICP ppm 1325 95.3 3.6 48 W M/ICP ppm 1.4 0.17 5.8 23 Y M/ICP ppm 2.5 0.63 12.8 40 Yb M/ICP ppm 0.33 0.09 14.2 8 Zn M/ICP ppm 785 79.4 5.1 56 Zr M/ICP ppm 18.2 5.6 15.2 38 11