President and chief operating officer Mike Frasersaid company has received a number of offers for the assets, which it up for sale in November last year as part of a shift away from coal.
The sale of 4,170 carats of Lulo diamonds achieved gross proceeds of US$9.14 million (A$11.43 million), representing an average price per carat of US$2,192.
Rio’s renewed interest in SQM is welcome by the Chilean government, which had expressed concerns about a potential and dangerous concentration in the market should major lithium producers, such as China’s Tianqi, acquire the 32% interest in SQM.
BHP's Escondida on Wednesday cast doubt on chances of starting talks on a new labor agreement with the company before formal negotiations scheduled for June.