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One of a collection of raw and manufactured products from the Great Exhibition of 1851 - a sample of mixed carbonate and sulphuret of copper from the Burra Burra Mines, South Australia
One of a collection of raw and manufactured products from the Great Exhibition of 1851 - a sample of mixed copper ore from Phoenix Mines, Cornwall
One of a collection of raw and manufactured products from the Great Exhibition of 1851 - a sample of mixed copper ore from St Breward, Cornwall