Iron pyrites, containing 2.18 per cent copper
1858
1858
1897
1913
1916
1921
1874
1937
1906
1947
1914
1898
1901
1889
1905
1932
1918
1920
1920
1897
1897
1899
1912
1921
1912
1904
1902
1918
1889
1918
1901
1905
1897
1921
1935
1913
1880
1927
1897
1912
1910
1910
1906
1888
1895
1907
1922
1879
1895
1921
1960