Diamond ring bought at car boot sale for $13 valued at $456,000

By Zamira Rahim, CNN
2 minute read
Updated 10:54 PM EDT, Mon May 22, 2017
This diamond, bought at a car boot sale for $13, is expected to sell for more than $400,000 at auction. It will hit the auction block at Sotheby's on June 7, 2017.
This diamond, bought at a car boot sale for $13, is expected to sell for more than $400,000 at auction. It will hit the auction block at Sotheby's on June 7, 2017.
Courtesy Sotheby's
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 $16,818,983.
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 $16,818,983.
courtesy christies
The world's largest blue diamond, an extremely rare gem known as "The Oppenheimer Blue", sold for $57.5 million at Christie's Geneva May 18, 2016, making it the most expensive diamond ever sold at auction.
The world's largest blue diamond, an extremely rare gem known as "The Oppenheimer Blue", sold for $57.5 million at Christie's Geneva 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 to ever be offered at auction.
'The Unique Pink' is the largest Fancy Vivid pink pear-shaped diamond to ever be offered at auction.
courtesy sotheby's
The diamond was sold for $31.6 million by Sotheby's, at an auction in Geneva. 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. The price makes it the most expensive Fancy Vivid pink diamond to sell at auction.
courtesy sotheby's
Cubic zirconia replicas of the original and a modern cut of the Kohinoor diamond, one of the oldest and most famous diamonds in the world.<br />
Cubic zirconia replicas of the original and a modern cut of the Kohinoor diamond, one of the oldest and most famous diamonds in the world.
Bloomberg/Bloomberg/Bloomberg via Getty Images
The De Beers Millennium Jewel 4 has broken auction records in Asia.
The De Beers Millennium Jewel 4 has broken auction records in Asia.
CNN
The stone sold for $31.8 million, which makes it the most expensive piece of jewelry sold at an auction in Asia.
The stone sold for $31.8 million, which makes it the most expensive piece of jewelry sold at an auction in Asia.
courtesy sotheby's
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
This 12.03-carat blue diamond fetched $48.4 million at auction on November 11, 2015. It was previously the world's most expensive price-per-carat diamond sold.
This 12.03-carat blue diamond fetched $48.4 million at auction on November 11, 2015. It was previously the world's most expensive price-per-carat diamond sold.
FABRICE COFFRINI/Getty Images
The fancy, vivid blue diamond was discovered in South Africa in January last year.
The fancy, vivid blue diamond was discovered in South Africa in January last year.
FABRICE COFFRINI/Getty Images
In recent years, other high-value diamonds have hit the auction block. The 59.60-carat oval cut pink diamond known as "The Pink Star," went for $80 million at a 2013 Sotheby's auction. However, after the buyer defaulted on payment, it was returned to Sotheby's.
In recent years, other high-value diamonds have hit the auction block. The 59.60-carat oval cut pink diamond known as "The Pink Star," went for $80 million at a 2013 Sotheby's auction. However, after the buyer defaulted on payment, it was returned to Sotheby's.
EMMANUEL DUNAND/AFP/Getty Images
This 118.28 oval white diamond became the largest sold at auction when it went for $30.6 million at a Sotheby's auction in 2013.
This 118.28 oval white diamond became the largest sold at auction when it went for $30.6 million at a Sotheby's auction in 2013.
Peter Macdiarmid/Getty Images Europe/Getty Images
In April 2015, a 100-carat, emerald cut, D color, internally flawless diamond -- the largest of its clarity and cut to ever be shown at auction -- <a href="http://edition.cnn.com/2015/04/21/world/sothebys-flawless-diamond/">sold for $22 million.</a>
In April 2015, a 100-carat, emerald cut, D color, internally flawless diamond -- the largest of its clarity and cut to ever be shown at auction -- sold for $22 million.
Courtesy Sotheby's
The 76.02-carat 400-year-old Archduke Joseph diamond set a new record for price per carat for a colorless diamond in 2012, when it sold for $21.5 million at a Christie's auction.
The 76.02-carat 400-year-old Archduke Joseph diamond set a new record for price per carat for a colorless diamond in 2012, when it sold for $21.5 million at a Christie's auction.
FABRICE COFFRINI/AFP/Getty Images