Browse diamond engagement rings,&nbsp;including one-of-a-kind pieces. From branded rings by Cartier&nbsp;and&nbsp;Van Cleef &amp; Arpels to vintage sapphire engagement&nbsp;rings&nbsp;and custom creations, our selection offers a range of ideas for life’s most important ring. <a href="https://www.sothebys.com/en/buy/luxury/jewelry/ring" rel="noopener noreferrer" target="_blank">All Rings</a>&nbsp;|&nbsp;<a href="https://www.sothebys.com/en/buy/luxury/jewelry" rel="noopener noreferrer" target="_blank">All Jewelry</a>

Engagement Rings

Jogani

Featuring a cushion shaped Ceylon <a href="https://www.sothebys.com/en/buy/luxury/jewelry/fine-jewelry/sapphire" rel="noopener noreferrer" target="_blank">sapphire</a>, surrounded by round brilliant cut diamonds.<ul><li><a href="https://www.sothebys.com/en/buy/luxury/jewelry/fine-jewelry/sapphire" rel="noopener noreferrer" target="_blank">Sapphire</a> weighing 3.91 carats&nbsp;</li><li>Diamonds weighing a total of approximately 0.80 carat</li><li>Maker’s mark for <a href="https://www.sothebys.com/en/buy/luxury/jewelry/jogani" rel="noopener noreferrer" target="_blank">Jogani</a>&nbsp;</li><li>18 karat gold&nbsp;</li><li>Total weight 5.78 grams</li><li>Size 6 ½&nbsp;</li><li>Accompanied by AGL report no. 1152241, dated 20 November 2025, stating that the sapphire is of Ceylon origin, with no indications of heating</li><li>Accompanied by one Sotheby's box</li></ul>

Gold, 3.94ct Ceylon Sapphire and Diamond Ring

Centering a marquise cut diamond, accented by French cut sapphires on the shoulders, and enhanced by princess cut diamonds set in the gallery.<ul><li>Marquise cut diamond weighing 1.51 carat</li><li>Additional diamonds weighing a total of approximately 0.10 carat</li><li>Platinum</li><li>Total weight 4.14 grams</li><li>Size 6½</li><li>Accompanied by GIA report no. 1182123710, dated 23 January 2017, stating that the 1.51 carat diamond is F color and VS1 clarity with No Fluorescence</li><li>Accompanied by one Sotheby's box</li></ul>

Platinum, 1.51ct Marquise Cut Diamond and Sapphire Engagement Ring

Centering a pear-cut diamond, accented by 23 calibré-cut sapphires and 59 round brilliant-cut diamonds.<ul><li>Pear-cut diamond weighing 2.09 carats</li><li>Sapphires weighing a total of approximately 0.65 carat</li><li>Round brilliant-cut diamonds weighing a total of approximately 0.25 carat</li><li>Platinum</li><li>Stamped with carat weight</li><li>Total weight 6.58 grams</li><li>Size 6½</li><li>Accompanied by GIA report no. 1226865748, dated 23 May 2023, stating that the 2.09 carat diamond is H color and SI1 clarity</li></ul>

Platinum, 2.09ct Pear Cut Diamond, Sapphire and Diamond Ring

Of art deco style, centering a cushion-shaped Sri Lanka <a href="https://www.sothebys.com/en/buy/luxury/jewelry/fine-jewelry/sapphire" rel="noopener noreferrer" target="_blank">sapphire</a>, accented by round diamonds.<ul><li><a href="https://www.sothebys.com/en/buy/luxury/jewelry/fine-jewelry/sapphire" rel="noopener noreferrer" target="_blank">Sapphire</a> weighs 10.15 carats</li><li>Round diamonds weighing a total of approximately 1.50 carats</li><li>Platinum</li><li>Size 7¾</li><li>Accompanied by one Sotheby's box</li><li>Accompanied by a GRS report no. GRS 2011-112290, dated 23 November 2011, stating the 10.15 carat sapphire is natural, vivid blue (GRS type "Royal Blue") and originated from Sri Lanka with heat treatment</li><li>Accompanied by an AGL report no. CS52145, dated 07 November 2012, stating the 10.15 carat sapphire is natural and originated from Sri Lanka with heat treatment</li></ul>

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Jogani