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

Diamond brooch and a diamond ring 

Emerald and diamond ring, first half of the 20th century

Natural pearl and diamond ring 

Diamond ring

Group of rings 

Emerald and diamond ring

Sapphire and diamond ring, 'Trombino', 1965

Pink sapphire and diamond ring

Featuring an&nbsp;oval-shaped light blue oval sapphire highlighted by a cluster of 16 round brilliant and 6 baguette diamonds.<ul><li>Diamonds weighing a total of approximately 2.10 carats</li><li>Sapphire weighing 7.23 carats</li><li>Engraved 7.23</li><li>18 karat white gold, hallmarked</li><li>Total weight 8.70 grams</li><li>Size 7¾</li><li>Accompanied by GCS report number 5782-726, dated 15.02.2022, stating the oval mixed cut 7.23 carats Light Blue Sapphire to be of natural origin from Sri Lanka (Ceylon) with no indication of heating</li></ul>

Vintage White Gold, 7.23ct Ceylon Sapphire and Diamond Cluster Ring

Centering an Old European cut diamond, accented by 22 single cut diamonds and filigree in Greek key pattern.<ul><li>Old European cut diamond weighs approximately 3.10 carats</li><li>Single cut diamonds weighing a total of approximately 0.30 carat</li><li>Platinum</li><li>Total weight 5.30 grams</li><li>Size 4½</li><li>Accompanied by vintage box</li></ul>

Platinum and 3.01ct Old European Cut Diamond Ring

Centering a square emerald cut diamond, accented by 18 single cut diamonds.<ul><li>Emerald cut diamond weighs approximately 1.40 carats</li><li>Single cut diamonds weighing a total of approximately 0.45 carat</li><li>Size 6 1/4</li><li>Total weight 3.31 grams</li><li>Platinum</li></ul>

Engagement Rings

Engagement Rings

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Bulgari

René Boivin