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The Most Stunning Celebrity Engagement Rings

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10. Gwen Stefani
The fiancé: Blake Shelton

The ring: Refinery29 spoke to Blue Nile's chief merchandising officer who informed them the ring is either round or oval cut and approximately 8 to 10 carats. The estimated value? A whopping $700 to $800k.

The proposal: October 2020

The marriage: TBD, but we can't wait to see what the fashion icon wears down the aisle.