Set in a platinum ring, the marquise brilliant-cut fancy deep blue is internally flawless and flanked by white diamonds. The ring is dated to 1923.
It enters the 29 October auction at Christie’s in Hong Kong with a high pre-sale estimate of $USD10.3 million ($AUD15.31 million).
The blue diamond will lead the Magnificent Jewels auction alongside the Oriental Sunrise earrings.
Each earring in this pair contains an oval mixed-cut, fancy vivid orange-yellow diamond – one weighing 12.20 carats and the other 11.96 carats.
The earrings also have a pre-sale estimate of $USD10.3 million ($AUD15.31 million).
A necklace featuring 26 oval-shaped Burmese rubies is also expected to generate great interest, with a high pre-sale estimate of $USD7.8 million ($AUD11.6 million).
Other items of note include a ring from Cartier featuring a 4.39-carat fancy vivid blue diamond with a pre-sale estimate of $USD4.5 million ($AUD6.69 million).
The auction features pieces from designers such as Wallace Chan, Boghossian, Tiffany & Co., and Harry Winston and is expected to return more than $USD50 million ($AUD74.31 million).
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