Known as <a href="http://www.christies.com/salelanding/index.aspx?intsaleid=27086&pid=en_homepage_upcoming5&saletitle=" target="_blank" target="_blank">"The Pink Promise,"</a> the oval jewel -- which is set in a platinum ring -- achieved the second-highest per-carat price ever paid for a pink diamond.
Known as "The Pink Promise," the oval jewel -- which is set in a platinum ring -- achieved the second-highest per-carat price ever paid for a pink diamond.
Courtesy Christie's
The record for the most expensive jewel sold at auction is currently held by the <a href="http://money.cnn.com/2017/04/04/luxury/pink-star-diamond-auction-sothebys/index.html">Pink Star</a>, a 59.60-carat, fancy vivid pink that sold for $71.2 million in April.
The record for the most expensive jewel sold at auction is currently held by the Pink Star, a 59.60-carat, fancy vivid pink that sold for $71.2 million in April.
JUSTIN TALLIS/AFP/AFP/Getty Images
The 37.30-carat Raj Pink diamond was auctioned off during Sotheby's <a href="http://www.sothebys.com/en/auctions/2017/magnificent-jewels-and-noble-jewels-ge1705.html" target="_blank" target="_blank">Magnificent Jewels and Noble Jewels</a> sale in Geneva on Nov. 15.
The 37.30-carat Raj Pink diamond was auctioned off during Sotheby's Magnificent Jewels and Noble Jewels sale in Geneva on Nov. 15.
Tristan Fewings/Getty Images Europe/Getty Images for Sotheby's
The Raj Pink is the world's largest known fancy intense pink diamond. It's one of a number of colored diamonds to make headlines in recent years.
The Raj Pink is the world's largest known fancy intense pink diamond. It's one of a number of colored diamonds to make headlines in recent years.
Tristan Fewings/Getty Images Europe/Getty Images for Sotheby's
In 2015, an exceptionally fancy vivid blue called the Blue Moon sold for $48.4 million.
In 2015, an exceptionally fancy vivid blue called the Blue Moon sold for $48.4 million.
Sotheby's
The Oppenheimer Blue, the world's largest blue diamond, sold for $57.5 million at Christie's Geneva on May 18, 2016, making it the most expensive diamond ever sold at auction.
The Oppenheimer Blue, the world's largest blue diamond, sold for $57.5 million at Christie's Geneva on May 18, 2016, making it the most expensive diamond ever sold at auction.
Christies Images Ltd 2016
The 14.62 carat Fancy Vivid stone is mounted on a platinum ring and flanked on either side by a trapeze-shaped diamond.
The 14.62 carat Fancy Vivid stone is mounted on a platinum ring and flanked on either side by a trapeze-shaped diamond.
Christies Images Ltd 2016
The Unique Pink is the largest Fancy Vivid pink pear-shaped diamond ever to be offered at auction.
The Unique Pink is the largest Fancy Vivid pink pear-shaped diamond ever to be offered at auction.
courtesy sotheby's
The diamond was sold for $31.6 million by Sotheby's at an auction in Geneva in May 2016. The price makes it the most expensive Fancy Vivid pink diamond to sell at auction.<br />
The diamond was sold for $31.6 million by Sotheby's at an auction in Geneva in May 2016. The price makes it the most expensive Fancy Vivid pink diamond to sell at auction.
courtesy sotheby's
A rare Fancy Vivid Blue diamond ring valued at $25 million will go up for auction on Nov. 16, 2016. The diamond is known as the Sky Blue diamond.
A rare Fancy Vivid Blue diamond ring valued at $25 million will go up for auction on Nov. 16, 2016. The diamond is known as the Sky Blue diamond.
courtesy sothebys
The Aurora Green is the largest Fancy Vivid green diamond ever sold at auction. The stone went under the hammer on May 31, 2016 at Christie's auction house in Hong Kong, selling for $16.8 million.
The Aurora Green is the largest Fancy Vivid green diamond ever sold at auction. The stone went under the hammer on May 31, 2016 at Christie's auction house in Hong Kong, selling for $16.8 million.
courtesy christies
Sotheby's <a href="http://edition.cnn.com/2016/03/20/entertainment/shirley-temple-ring-auction-sothebys/">auctioned</a> this 9.54 carat ring it says belonged to child star Shirley Temple on April 19, 2016. Though it was expected to fetch between $25 million and $35 million, it failed to sell.
Sotheby's auctioned this 9.54 carat ring it says belonged to child star Shirley Temple on April 19, 2016. Though it was expected to fetch between $25 million and $35 million, it failed to sell.
Sotheby's
In April 2016, the De Beers Millennium Jewel 4 broke auction records in Asia.
In April 2016, the De Beers Millennium Jewel 4 broke auction records in Asia.
CNN
The stone sold for $31.8 million, making it -- at the time -- the most expensive piece of jewelry sold at an auction in Asia.
The stone sold for $31.8 million, making it -- at the time -- the most expensive piece of jewelry sold at an auction in Asia.
courtesy sotheby's