With significant  new investments in Basutoland and Bechuanaland at the periphery of British territory, Rhodes spent  much of the latter half of the 1880s extending his diamond concerns to monopolize the entirety  of the South African diamond trade.

随着在英国领土外围的巴苏陀兰和贝专纳兰进行大量新投资，罗兹在 1880 年代后半叶的大部分时间里扩大了他的钻石业务， 以垄断整个南非钻石贸易。