The most expensive diamond ring ever sold is the Pink Star Diamond Ring, which fetched an astonishing $71.2 million at Sotheby’s Hong Kong in 2017[1][4]. This ring features a 59.60-carat oval-shaped fancy vivid pink diamond that is both the largest Internally Flawless Fancy Vivid Pink diamond ever graded by the Gemological Institute of America (GIA) and a rare Type IIa gem, denoting exceptional purity[1]. Originally cut from a 132.5-carat rough diamond, it was later renamed the “CTF Pink” by the buyer Chow Tai Fook[1].
This remarkable diamond ring surpasses even the most extravagant celebrity and historic rings, such as those owned by Mariah Carey and Grace Kelly, both of which are valued in the $10–45 million range but do not match the Pink Star’s record auction price[2][6].
References
- [1] Top 12 Most Expensive Diamond Rings in the World – Assembo.ai
- [4] 10 Most Expensive Diamond Rings in the World (And Their Stunning Stories) – Angara
- [2] The most expensive celebrity engagement rings of 2025… so far! – Steven Stone
- [6] Top 22 Most Expensive Wedding Rings in the World (2025 List) – Marketing91
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