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

Impressive Diamond Ring 

Elegant Diamond Ring 

Diamond ring 

Diamond Ring 

Collection of Diamond Jewels

Fine Diamond Ring 

Diamond Ring

Bulgari

Diamond Bracelet and Ring 

Exquisite Diamond Ring 

Sapphire and Diamond Demi Parure

Sapphire, Yellow Sapphire and Diamond Ring

Attributed to Van Cleef & Arpels 

Emerald and Diamond Ring

 Buccellati

Sertie d'un rubis ovale pesant 2.03 carats dans un entourage de diamants taille brillant et deux diamants taille coeur pesant 0.30 et 0.31 carats<ul><li>Tour de doigt 55</li><li>Poinçon français d'import pour l'or 18K (750°/00)</li><li>Poids brut 5.76 g</li><li>Accompagnée d'un certificat Gubelin no. 25070029, daté du 9 juillet 2025 pour le rubis , indiquant l'origine géographique Mozambique et l'absence de traitement pour ce rubis</li><li>Accompagnée de deux certificats GIA no. 1445733888 et 7408183024 pour les deux diamants taille coeur, datés du 20 septembre 2022 et 6 octobre 2021</li></ul> Set with an oval ruby weighing 2.03 carats surrounded by brilliant-cut diamonds and two heart-shaped diamonds weighing 0.30 and 0.31 carats<ul><li>Size 55</li><li>French import assay mark for 18 carat gold</li><li>Gross weight 5.76 grams</li><li>Accompanied by a Gubelin report for the ruby nr. 25070029, dated July 9th 2025, stating that the ruby is of Mozambic origin with no indications of treatment</li><li>Accompanied by two GIA certificates nr. 1445733888 and 7408183024 for the two heart-brilliant-cut diamonds, dated September 20th 2022 and October 6th 2021</li></ul>

Bague rubis et diamant | Ruby and diamond ring

Centering with a lozenge step cut diamond, flanked by 2 kite shaped diamonds.<ul><li>Lozenge cut diamond weighing 4.40 carats</li><li>Kite shaped diamonds weighing a total of approximately 0.80 carat</li><li>Platinum</li><li>Total weight 5.53 grams</li><li>Size 8½</li><li>Accompanied by one Sotheby's box</li><li>Accompanied by GIA report no. 5222913183, dated 20 April 2023, stating that the 4.40 carat diamond is D color and VS1 clarity with no fluorescence</li></ul>

Platinum, 4.40ct Lozenge Shape Diamond and Diamond Engagement Ring

Diamond Ring weighing 4.17 carats Featuring an old European-cut diamond, the shoulders accented by similarly-shaped diamonds.•&nbsp;&nbsp;&nbsp;&nbsp;Diamond weighing 4.17 carats•&nbsp;&nbsp;&nbsp;&nbsp;Size 63•&nbsp;&nbsp;&nbsp;&nbsp;French maker's mark•&nbsp;&nbsp;&nbsp;&nbsp;Stamped 950 for platinum•&nbsp;&nbsp;&nbsp;&nbsp;Gross weight approximately 5 grams

Diamond Ring weighing 4.17 carats

Jogani

Featuring a circular brilliant cut diamond, accented by single cut diamonds.<ul><li>Circular brilliant cut diamond weighing 6.33 carats</li><li>Single cut diamonds weighing a total of approximately 0.40 carat</li><li>Maker's mark for Jogani</li><li>Stamped PLAT and 20K</li><li>Platinum and 20 karat yellow gold</li><li>Total weight 7.75 grams</li><li>Size 6½</li><li>Accompanied by one Sotheby's box</li><li>Accompanied by GIA report no. 6233806675, dated 17 December 2025, stating that the 6.33 carat diamonds is F color and SI1 clarity with Faint fluorescence</li></ul>

Platinum, Gold, 6.33ct Circular Brilliant Cut Diamond and Diamond Ring

Harry Winston

Centering a cushion cut diamond, accented by round brilliant cut diamonds and accompanied by a band featuring continuously set round brilliant cut diamonds.<ul><li>Cushion cut diamond weighing 1.85 carats</li><li>Round brilliant cut diamonds on the <a href="https://www.sothebys.com/en/buy/the-bridal-shop/engagement-rings" rel="noopener noreferrer" target="_blank">engagement ring</a> weighing a total of approximately 0.60 carats</li><li>Round brilliant cut diamonds on the band weighing a total of approximately 0.35 carats</li><li>Maker's mark for Harry Winston with serial number</li><li>Platinum</li><li>Total weight 5.69 grams</li><li><a href="https://www.sothebys.com/en/buy/the-bridal-shop/engagement-rings" rel="noopener noreferrer" target="_blank">Engagement ring</a> size 4¼</li><li>Eternity band ring size 4½</li><li>Accompanied by a signed box and certificate of authenticity</li><li>Accompanied by a copy of GIA report no. 1139316131, dated 16 May 2012, stating that the 1.85 carat diamond is E color and VVS1 clarity with No Fluorescence</li><li>This item is final sale and not eligible for return</li></ul>

Platinum, 1.85ct Cushion Cut Diamond and Diamond Engagement Ring and Eternity Band Ring Set

Centering a round brilliant cut diamond and accented by smaller round brilliant cut diamonds.<ul><li>Central diamond weighing 0.73 carat</li><li>Additional diamonds weighing a total of approximately 0.60 carat</li><li>Harry Winston maker's mark with serial number</li><li>Platinum</li><li>Total weight 4.29 grams</li><li>Size 4¼</li><li>Accompanied by a signed box, pouch, cleaning kit, certificate of authenticity and bag</li><li>Accompanied by GIA report no. 6213272974, dated 12 November 2020, stating that the 0.73 carat diamond is D color and VS2 clarity with No Fluorescence</li><li>This item is final sale and not eligible for return</li></ul>

Platinum, 0.73ct Round Brilliant Cut Diamond and Diamond Engagement Ring 

Centering a marquise cut diamond framed by calibré cut <a href="https://www.sothebys.com/en/buy/luxury/jewelry/fine-jewelry/emerald" rel="noopener noreferrer" target="_blank">emeralds</a> and round brilliant cut diamonds.<ul><li>Center diamond weighing 1.01 carats</li><li>Additional diamonds weighing a total of approximately 0.32 carats</li><li><a href="https://www.sothebys.com/en/buy/luxury/jewelry/fine-jewelry/emerald" rel="noopener noreferrer" target="_blank">Emeralds</a> weighing a total of approximately 0.58 carats</li><li>Platinum</li><li>Total weight is 4.81 grams</li><li>Size 6¾</li><li>Accompanied by GIA report no. 5192056613 dated Jan. 26, 2018, stating that the 1.01 carat diamond is F color and VS2 clarity with faint Fluorescence</li><li>Accompanied by one Sotheby's box</li></ul>

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Bulgari

Bulgari

Bulgari

Attributed to Van Cleef & Arpels

Buccellati

Jogani

Harry Winston

Harry Winston