An 8.4-carat vivid pink-purple diamond mounted on a platinum ring has sold for $17.7m at Sotheby's Hong Kong.
The lot beat its $15.4m estimate by 14.9% on October 7.
Quek Chin Yeow, Sotheby's deputy chairman of international jewellery business in Asia, commented prior to the sale: "This colour is one of the most beautiful and concentrated shades of pink in diamonds that I have seen.
"Together with its exceptional clarity, it is not surprising that it would command the highest per-carat pre-sale estimate for any pink diamond to date."
The Pink Dream holds the record for the most valuable pink diamond ever sold at auction, achieving $83.1m at Sotheby's New York in 2013.
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