Auction Records

Top 10 Most Expensive Diamonds Ever Sold

Exceptional diamonds set extraordinary auction records. The Pink Star diamond — a 59.60-carat internally flawless pink diamond — sold for $71.2 million at Sotheby's Hong Kong in 2017, the highest price ever achieved for a gemstone. The CTF Pink Star, the Blue Moon of Josephine, and the Oppenheimer Blue all command nine-figure valuations.

World record: $71.2M — Pink Star diamond (59.60 ct), Sotheby's Hong Kong 2017

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The Top 10 Results

Verified hammer prices — buyer's premium not included. What is buyer's premium?

A SUPERB COLOURED DIAMOND AND DIAMOND RING, BY CARTIER

A SUPERB COLOURED DIAMOND AND DIAMOND RING, BY CARTIER …

CHRISTIE'S, Hong Kong October 2024

$23,365,000

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COLOURED DIAMOND AND DIAMOND RING

COLOURED DIAMOND AND DIAMOND RING …

CHRISTIE'S, Hong Kong May 2024

$22,155,000

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'THE MELLON BLUE'SENSATIONAL COLOURED DIAMOND AND DIAMOND RING

'THE MELLON BLUE'SENSATIONAL COLOURED DIAMOND AND DIAMOND RING …

CHRISTIE'S, Geneva November 2025

$20,525,000

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THE MARIE-THÉRÈSE PINK A HISTORIC JAR COLORED DIAMOND RING

THE MARIE-THÉRÈSE PINK A HISTORIC JAR COLORED DIAMOND RING …

CHRISTIE'S, New York June 2025

$13,980,000

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EXCEPTIONAL COLOURED DIAMOND, DIAMOND AND RUBY BALLERINA RING, MOUNTED BY BOUCHERON

EXCEPTIONAL COLOURED DIAMOND, DIAMOND AND RUBY BALLERINA RING, MOUNTED BY BOUCHERON …

CHRISTIE'S, Geneva May 2025

$10,640,000

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AN ELEGANT COLOURED DIAMOND AND DIAMOND RING

AN ELEGANT COLOURED DIAMOND AND DIAMOND RING …

CHRISTIE'S, Hong Kong May 2024

$10,055,000

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IMPORTANT RUBY AND DIAMOND NECKLACE

IMPORTANT RUBY AND DIAMOND NECKLACE Designed as twenty-five cushion-shaped rubies together weighing 50.24 carats, the largest ruby weighing 3.11 carats, decorated and spaced by rou…

BONHAMS AUCTIONEERS & VALUERS, Hong Kong, Admiralty November 2022

$9,813,000

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