What Is the Most Expensive Diamond?
The most expensive diamond sold at auction is the Pink Star, a 59.60 carat vivid pink stone. In 2017, it sold for about $71.2 million in Hong Kong, setting a world record for any gemstone.
Why Are Some Diamonds So Expensive?
Price is driven by size, color, clarity, and cut. Rare colored diamonds, especially vivid pinks, blues, and reds, command the highest prices. Large stones with top clarity and strong auction demand push values even higher.
Where to See and Learn More
Major auction houses and gemological institutes document record sales and grading reports. For detailed auction history and current market data, visit Sotheby's.
