World's largest diamond previewed in London ahead of auctionFairfax Media A tennis ball-sized diamond could sell for more than $70 million when it's auctioned by Sotheby's in June. DYLAN MARTINEZ The "Lesedi La Rona" is the largest gem quality rough diamond discovered in over 100 years. LUCAS JACKSON/REUTERS The 1109 carat "Lesedi La Rona" diamond will be auctioned at the end of June. LUCAS JACKSON/REUTERS A model displays the 1109 carat "Lesedi La Rona" diamond. "Lesedi la Rona", the world's largest gem-quality rough diamond discovered in more than 100 years, goes on display in London this week before it heads for the auction block where it is expected to fetch more than US$70 million (NZ$100 million).

Source: Stuff June 14, 2016 21:11 UTC