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Everything you need to know about the rare pink diamond that’s being auctioned next month

A dazzling pink diamond named the Williamson Pink Star is going to auction in Hong Kong next month.

At 11.15 carats, the Williamson Pink Star is the second largest internally flawless fancy vivid pink diamond to ever appear at auction.

Fine jewellery and engagement ring specialists at Steven Stone couldn’t wait to take a close look and have revealed everything you need to know about the vivid pink sparkler.

Instagram: @sothebysjewels
Instagram: @sothebysjewels

The diamond is cushion shaped, which is a popular choice when it comes to celebrity engagement rings – with Stacey Solomon and Meghan Markle’s engagement rings featuring cushion shaped diamonds.

The name “Williamson Pink Star” is a tribute to two other famous pink diamonds – “CFT Pink Star” and the “Williamson” stone.

CFT Pink Star

The CFT Pink Star is a 59.60-carat oval mixed-cut diamond which sold for a record $71.2 million when it went to auction in 2017 – five years on, it still holds the world auction record for any diamond, gemstone or jewel.

Williamson Stone

The Williamson stone is a 23.60 carat diamond that was given to Queen Elizabeth as a wedding gift by Canadian geologist, John Thorburn Williamson. Worn by the monarch in her Williamson brooch, it was discovered in his mine in Tanzania – the same mine in which the Williamson Pink Star was discovered.

As a rough gem, it weighed 54.5 carats, and Princess Elizabeth displayed it at St. James’s Palace ahead her royal wedding to Prince Philip. She later turned to diamond cutters Briefel and Lemer to transform the rough diamond into a faceted gem. 

Worth £25,000,000, the Williamson brooch is the second most valuable brooch in the Queen’s collection.

“Found in a small number of diamond mines throughout the world, pink diamonds are one of the rarest coloured diamonds that exist.

The diamonds name is in tribute to one of the most famous pink diamonds, which is in the Queen’s Williamson brooch – worth a staggering £25,000,000, it’s the second most valuable brooch in her collection.

Pink diamonds are exceedingly valuable due to their rarity – the price can be much more than the price of a traditional white diamond. Typical white diamonds are usually pricier the more they lack colour, but with pink diamonds, the more vivid the colour, the more expensive the stone usually is.

Taking this into account, I’d estimate the approximate value of the Williamson Pink Star diamond to be $20,000,000.”

zack stone, managing director, steven stone

If you’re looking for a diamond of your own, why not take a look at our stunning selection of engagement rings, wedding rings, and fine jewellery. We have showrooms in Manchester and a wide variety of engagement rings in London.

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