What is the name of the first authenticated diamond discovered in South Africa?

The first authenticated diamond discovered in South Africa is known as the Eureka diamond. Discovered in 1867 near the Orange River, the Eureka diamond holds significant historical importance as it marked the beginning of the South African diamond rush. Weighing 21.25 carats, it was found by a young boy named Erasmus Jacobs, and its discovery led to extensive diamond mining activities in the region.

The name Eureka itself reflects the excitement of discovery, as it is derived from the ancient Greek word meaning "I have found it." This diamond not only set off a wave of prospecting in the Kimberly region but also played a critical role in shaping the diamond industry in South Africa.

Other options, while notable in different contexts, do not pertain to the first diamond discovered in South Africa. The Hope Diamond, for instance, is famous for its blue color and storied history but was not discovered in South Africa. The Shining Star and Star of Africa refer to different diamonds with their unique significances but are not connected to the historical discovery of diamonds in South Africa.