Rockwell's major diamond properties and projects include interests in the following assets:
- Klipdam Mine, Northern Cape, South Africa
- Saxendrift Mine, Middle Orange River, South Africa
- Tirisano Mine, Vaal River, South Africa
- Wouterspan Property, Middle Orange River, South Africa
- Niewejaarskraal Property, Middle Orange River, South Africa
| Property |
Category |
Volume (m3)* |
Grade(ct/100m3) |
Value (USD/ct)43-101 |
| Saxendrift/Kwartelspan |
Probable* |
4,565,400 |
0.5 |
$2,029 |
| Indicated |
1,774,600 |
0.66 |
| Inferred |
5,986,000 |
0.56 |
| Klipdam |
Indicated |
1,907,900 |
1.21 |
$1,049 |
| Inferred |
949,000 |
| Holpan |
Indicated |
395,000 |
0.95 |
$1,229 |
| Inferred |
527,000 |
| Erf 404 |
Indicated |
404,700 |
0.63 |
$986 |
| Inferred |
127,000 |
| Rietputs |
Inferred |
735,000 |
0.76 |
$788 |
| Wouterspan |
Indicated |
5,025,500 |
0.7 |
$2,029 |
| Inferred |
37,774,000 |
| Niewejaarskraal |
Inferred |
20,630,000 |
0.84 |
$2,029 |
| Tirisano** |
Indicated |
25,279,900 |
2.37 |
$606 |
| Inferred |
15,334,000 |
Estimates done at November 30, 2010 and reconciled to February 28, 2011 by including material removed by trial mining and bulk sampling in Q4 FY2011.
Value: average value of the sales of diamonds during sampling.
* Saxendrift probable mineral reserves are exclusive from the indicated mineral resources.
** Tirisano acquisition not yet complete as the mining rights have not yet been ceded to Rockwell.
Rockwell also holds the Zwemkuil Project (incl. Zwemkuil, Mooidraai and Holsloot properties), which was reviewed in fiscal 2011. This is a significant exploration target, but to date there has not been sufficient work done to estimate mineral resources
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