What Is the Biggest Diamond Ring in the World
The largest diamond ring by center stone is the "The Pink Star" ring, a 59.60 carat internally flawless vivid pink diamond mounted in a ring setting. It was sold by Sotheby's Hong Kong in April 2017 for a record 71.2 million dollars, making it the most expensive jewelry item ever auctioned at the time. The ring was crafted by the international jeweler De Beers and set a benchmark for high value colored diamond rings worldwide Forbes.
Another contender for the title of biggest diamond ring is the "Graff Pink," a 24.78 carat rare pink diamond ring sold at Sotheby's Geneva in November 2010 for 46 million dollars. While smaller than the Pink Star, the Graff Pink held the auction record for a single piece of jewelry before the Pink Star sale. Both rings are classified as fancy vivid pink, the highest color grade for pink diamonds, and are studied by gemologists as examples of extreme rarity and value Gemological Institute of America.
Largest Diamond Rings by Carat Weight and Price
When ranking the biggest diamond ring by total carat weight, the "Heart of the Ocean" style large halo designs often exceed 100 carats in total gem weight, but these are not single stone records. The largest single diamond ever used in a ring is the 59.60 carat Pink Star, which is also the largest fancy vivid pink diamond ever sold at auction. Before the Pink Star, the record was held by the 100.09 carat "The Winston Blue," a flawless blue diamond sold at Christie's Geneva in May 2014 for 23.8 million dollars Christie's.
In terms of price per carat, the Pink Star achieved over 1.2 million dollars per carat, a record for any gemstone at auction. The "Blue Moon of Josephine," a 12.03 carat flawless blue diamond ring, sold at Sotheby's Geneva in November 2015 for 48.5 million dollars, or roughly 4 million dollars per carat. These figures are used by investors and collectors to compare the value of the biggest diamond ring entries against other colored stones and large white diamonds Sotheby's.
How the Biggest Diamond Rings Are Graded and Certified
Every top record holding ring is graded by independent laboratories such as the Gemological Institute of America or the International Gemological Institute. The Pink Star was graded by GIA as fancy vivid pink, internally flawless, with a precise measurement of 23.44 by 20.07 millimeters. These certifications confirm the color, clarity, cut, and carat weight that justify the multi million dollar valuations of the biggest diamond ring pieces.
Major auction houses like Sotheby's and Christie's require full provenance reports and lab certificates before offering any stone above 10 carats in their jewelry auctions. The seller, often a private collector or a mining company such as De Beers or Alrosa, provides the rough stone, which is then cut and polished to maximize carat weight and color. The resulting ring is then marketed to ultra high net worth buyers and institutional collectors, with prices driven by rarity, market demand, and the