Another event of considerable commercial importance to the Cape Colony, and indeed to all of South Africa, was the amalgamation of the diamond-mining companies which was chiefly brought about by Cecil Rhodes, Alfred Beit and "Barney" Barnato in 1889.
En anden vigtig økonomisk hændelse for Kapkolonien, ment for hele Sydafrika, var samlingen af diamantgraveselskaber som hovedsagelig blev gennemført af Cecil Rhodes, Alfred Beit og "Barney" Barnato i 1889.