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Sotheby’s will offer an 11.28-carat blue diamond in a single-lot Hong Kong auction, where it is expected to fetch up to $37 million. The October 5 sale of the radiant-cut, fancy-vivid blue [...]

Lucara Diamond Corp. has recovered a 692.3-carat diamond from its Karowe mine in Botswana, the second massive rough from the deposit this month. The white, type IIa stone came from the EM/PK(S) [...]