LONDON (AP) — The 1,109-carat Lesedi la Rona diamond, to be sold by Sotheby's in London on June 29, is one of the biggest gem-quality diamonds ever discovered. It joins an elite list of hefty rocks:

1. Cullinan Diamond, 3,106.75 carats. Discovered in South Africa in 1905.

2. Lesedi la Rona, 1,109 carats. Discovered in Botswana in 2015.

3. Excelsior, 995.2 carats. Discovered in South Africa in 1893.

4. Star of Sierra Leone, 969 carats. Discovered in Sierra Leone in 1972.

5. Incomparable Diamond, 890 carats. Discovered in Democratic Republic of Congo in the 1980s.