What event triggered the South African diamond rush?

The correct response is based on the significant impact that the discovery of the Star of South Africa had on the diamond rush in South Africa. The Star of South Africa was a notable diamond found in the 1860s, which was among the first large diamonds discovered in the country. This particular finding catalyzed public interest and prompted people to flock to South Africa in hopes of discovering their own riches.

The allure of such a noteworthy gemstone directly led to increased exploration and mining activities in the region, which ultimately escalated into a full-fledged diamond rush. This event marked a pivotal moment in the history of diamond mining, as it not only highlighted South Africa's potential as a diamond-producing country but also stimulated economic and social changes that would shape the industry's development in the years that followed.

Understanding this foundational event helps clarify how specific milestones in gemstone discovery can significantly influence broader economic phenomena, such as rushes and booms in resource-seeking expeditions.