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OTHER INVESTMENTS (Table) | 12 Months Ended
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Jun. 30, 2020
Other Investments [abstract] |
Investment in other entities |
| Amounts in R million | Shares held | % held | 2020 | 2019
| Listed investments (Fair value hierarchy Level 1): |  |  |  |
| West Wits Mining Limited ("WWM") 1 | 47,812,500 | 5.1% | 12.0 | 3.3
| Total listed investments |  |  | 12.0 | 3.3
| Unlisted investments (Fair value hierarchy Level 3): |  |  |  |
| Rand Refinery Proprietary Limited ("Rand Refinery") 2 | 44,438 | 11.3% | 178.4 | -
| Rand Mutual Assurance Company Limited B Share Business Fund ("RMA") 2,3 | 12,659 | 1.3% | 4.7 | -
| Guardrisk Insurance Company Limited (Cell Captive A170) 2,4 | 20 | # | 0.1 | 0.1
| Chamber of Mines Building Company Proprietary Limited 2 | 42,292 | 4.5% | 0.1 | 0.1
| Total unlisted investments |  |  | 183.3 | 0.2
| Balance at the end of the year |  |  | 195.3 | 3.5
| Dividends received on equity instruments at fair value through OCI (RMA) |  | 6 | (4.3) | -
| Fair value adjustment on equity instruments at fair value through OCI |  |  | 191.8 | (5.9)
| 1 Listed |  |  |  |
| 2 Unlisted |  |  |  |
| 3 The 1 "B Share Business Fund" share relates to all the businesses of the RMA Group that do not relate to the Compensation for Occupational Injuries and Diseases Act
| 4 The shares held entitles the holder to 100% of the residual net equity of Cell Captive A 170 after settlement of the reimbursive right
Key observable/unobservable inputs into the model |
| Amounts in R million | Observable/unobservable input |
| Rand Refinery operations |  |
| Average gold price | Observable input | R852,098/kg
| Average silver price | Observable input | R9,453/kg
| Average South African CPI | Observable input | 4.8%
| Terminal growth rate | Unobservable input | 5.0%
| Weighted average cost of capital | Unobservable input | 15.1%
| Investment in Prestige Bullion |  |
| Discount period | Unobservable input | 13 years
| Cost of equity | Unobservable input | 13.2%
Sensitivity analysis |
|  |  | Input | % change in OCI, net of tax
| Amounts in R million |  | Increase | Decrease | Increase | Decrease
| Rand Refinery operations |  |  |  |  |
| Rand US Dollar exchange rate | Observable inputs | 1% | (1%) | 2.1% | (2.2%)
| Commodity prices (Gold and silver) | Observable inputs | 1% | (1%) | 1.7% | (1.8%)
| Volumes | Unobservable inputs | 1% | (1%) | 2.0% | (2.0%)
| Weighted average cost of capital | Unobservable inputs | 1% | (1%) | (1.7%) | 2.0%
| Minority discount | Unobservable inputs | 1% | (1%) | (1.2%) | 1.2%
| Marketability discount | Unobservable inputs | 1% | (1%) | (1.2%) | 1.2%
| Investment in Prestige Bullion |  |  |  |  |
|  |  |  | = |  |
| Cost of equity | Unobservable inputs | 1% | (1%) | (1.3%) | 1.4%
| Prestige Bullion dividend forecast | Unobservable inputs | 1% | (1%) | 0.4% | (0.4%)

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