Why was the Kimberley discovery of 1866 a turning point in diamond mining?

• A. It proved that diamonds occur only in deep-sea deposits.
• B. It showed that diamonds could be first found in Africa but not cause any industry change.
• C. It demonstrated that all diamond mining would disappear after a few years.
• D. It revealed rich alluvial diamonds, catalyzing large-scale mining, rapid town development, and the emergence of modern diamond corporations in South Africa.

Answer: (D)

A single rich alluvial discovery in 1866 showed that diamonds could be exploited on a large scale in South Africa, triggering a mining boom, rapid town growth, and the birth of modern diamond corporations. The find near Kimberley revealed substantial, near-surface diamonds in river gravels, which drew a rush of prospectors and investors. This shifted diamond mining from scattered, artisanal digging to organized, industrial-scale operations, with centralized claims, capital investment, and the need to manage supply and prices. It also fostered the emergence of major companies, laying the groundwork for a global diamond industry centered in South Africa, exemplified later by De Beers. The other statements misstate where diamonds were found, the impact on industry, or the longevity of mining, whereas Kimberley’s discovery really did inaugurate a new era of organized, corporate diamond mining.