What is the largest rough gem-quality diamond ever found (as at 2010)?
Excelsior Diamond Excelsior Diamond The Excelsior Diamond is a gem-quality diamond, and was the largest known diamond in the world from the time of its discovery in 1893 until 1905, when the larger Cullinan Diamond was found. It was found on June 30, 1893 at the Jagersfontein Mine in South Africa, south east of Kimberley whose fame as a diamond mining center always overshadowed that of Jagersfontein. It had a blue-white tint and weighed 971 old carats or 995.2 metric carats (or 194 g). The Excelsior rates as the third largest rough diamond of gem quality ever found. It was ultimately cut
Lucara Diamond discussing a merger with Gem Diamonds. After the discovery of the Lesedi La Rona, the company's shares went up 28%. Lucara Diamond Lucara Diamond Corp. () is a diamond exploration and mining company, operating in southern Africa but established in Canada. In November 2015, Lesedi La Rona, the world's second largest gem-quality diamond ever found, was found at the Karowe mine in Botswana. On 18November 2015, the company announced the discovery of the Lesedi La Rona, the world's second largest gem-quality diamond ever (second only to the 3,106 carat Cullinan). The type IIa diamond was found in the company's Karowe