World’s second-largest diamond found in Botswana Sub: Geo Sec: Eco geo  Context: A 2,492-carat rough diamond, the second-largest ever found, was unearthed in Botswana at the Karowe mine, owned by Canadian firm Lucara Diamond. It is the largest find since the 3,106-carat Cullinan diamond, discovered in South Africa in 1905, parts of which […]