The 228.31-carat stone is up for grabs alongside a historic intense yellow diamond associated for more than a century with the Red Cross, which will receive some of the profits from its sale.
The Rock is “a truly exceptional pear-shaped diamond”, said Max Fawcett, head of the jewels department at Christie’s auction house in Geneva.
It is “the largest white diamond ever to be offered at auction”,
WHO OWNS ‘THE ROCK’?
The Rock is currently in the hands of an unnamed owner from North America.
It could even break records when it goes under the hammer.
“It’s perfectly symmetrical and is estimated at $20 to $30 million (about R321 to R482 million) — and I expect there be fireworks on Wednesday,”
The equivalent in euros is 19 to 28 million.
The expert said that there were only a handful of diamonds of similar size and quality to The Rock. The Christie’s record for a similar white diamond is $33.7 million (about R542 million), fetched in Geneva in 2017 for a 163.41-carat gem.
Larger than a golf ball, The Rock was extracted from a mine in South Africa in the early 2000s. It has been shown in Dubai, Taipei and New York ahead of the sale in Geneva.
Red Cross gem
Bidders will also be vying for The Red Cross Diamond, a cushion-shaped, 205.07-carat canary yellow jewel, which has a price estimate of seven to 10 million Swiss francs ($7.09 to $10.13 million) equals to (about R114 to R163 million).
“I expect that it will achieve much more on the day of sale,”
A large chunk of the proceeds will be donated to the International Committee of the Red Cross, which is headquartered in Geneva.
The original rough stone was found in 1901 in a De Beers company mine in South Africa and is said to have weighed around 375 carats.
The stone was first put up for sale on 10 April, 1918 at Christie’s in London. It was offered by the Diamond Syndicate in aid of the British Red Cross Society and the Order of St John.
The Red Cross Diamond fetched £10 000 — approximately £600 000 ($740 000) equals to (about R12 million) in today’s money. It was bought by the London jewellers S.J. Phillips.
It was sold again by Christie’s in Geneva in 1973, fetching 1.8 million Swiss francs, (about R29 million) and is now being offered by the auction house for a third time.
“For nearly half a century, our family has had the privilege of safeguarding The Red Cross Diamond,”
the gem’s anonymous private owner said in a statement.
Several other diamonds will be auctioned on Wednesday, plus a tiara that belonged to princess Irma of Furstenberg (1867-1948), a member of one of the most pre-eminent aristocratic families in the Habsburg Empire.
It is estimated to go for 400 000 to 600 000 Swiss francs (about R6.5 to R9.7 million)
“The diamond market at the moment is very, very strong,”
He said rising demand, supply constraints due to “geopolitical issues” and inflationary pressure on commodities, including precious stones, was pushing the market to highs not seen since its 2013-2014 peak.
The Russian invasion in Ukraine has had a major impact.
More than 40% of the world’s diamonds are mined in Russia, including the famous Alrosa mine, but international markets no longer have access to Russian gems, said Fawcett.
The supply constraint has created major price hikes and with the sanctions imposed on Moscow following the 24 February invasion, “prices will only continue to increase”, he said.
© Agence France-Presse