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Significant accounting policies (Tables)
12 Months Ended
Jun. 30, 2023
Significant accounting policies [Abstract]  
Expected Useful Lives
Depreciation is calculated on a straight-line basis to write off the net cost of each item of property, plant and equipment (excluding land) over their expected useful lives as follows:

Buildings
20 years
Plant and equipment
3-10 years
Mining hardware
4 years