The 2013 Argyle Pink Diamonds Tender of 64 red, pink and blue stones drew a record number of bids over $1 million from established markets such as Japan and Australia as well as emerging markets China and India.
The highlight was the Argyle Phoenix, a 1.56 carat gem and one of three Fancy Red diamonds on offer, which sold for more than USD 2 million to a Singapore-based jeweller, the highest per-carat price paid for any diamond ever produced from Rio's Argyle mine in Western Australia.
Another record was set for the Argyle Dauphine, a 2.51 carat Fancy Deep Pink diamond, which also sold for more than USD 2 million, to a US-based dealer.
Rio's Pink Diamonds manager Josephine Johnson said the prices reflected "increasing demand from the world's top jewellers, designers, collectors and connoisseurs".
"These fabulous flukes of nature are a good news story in the mining industry at the moment," she told AFP.
"There was a lot of interest from our established markets such as Australia, the United States, Japan and Europe but also China and India, where there is now very strong demand.