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The standout jewelry at the 2025 Oscars ranged from enormous reported diamond totals to vivid colored stones and century-old designs. Scarlett Johansson, Coco Jones and Doja Cat wore headline-making necklaces, while Demi Moore’s Chopard set, Zoe Saldaña’s emerald-and-onyx Cartier panther and archival pieces on Mikey Madison and Elle Fanning showed that extravagance was about more than carat weight. There is no supported, apples-to-apples ranking of the most expensive look: the available coverage does not establish comparable independent appraisals.
The Academy’s 97th ceremony took place in Los Angeles on March 2, 2025. The Academy’s 2025 ceremony page identifies the event. The jewelry details below come from published red-carpet coverage; reported carat weights are not independent appraisals.
Who wore the biggest diamonds at the 2025 Oscars?
Among the prominently reported figures, Coco Jones’s Harry Kotlar necklace was described as 104 carats, Scarlett Johansson’s De Beers necklace as 74.73 total carats, and Doja Cat’s Messika necklace featured a 34-carat yellow diamond. These figures refer to different pieces and descriptions, so they are useful scale markers—not a verified contest for the biggest individual diamond or the most valuable jewelry.
Coco Jones: Harry Kotlar necklace
Jones wore a cushion-cut diamond necklace reported at 104 carats by Natural Diamonds’ Oscars roundup. The coverage does not establish an independent appraisal or a consistent comparison with every other piece at the ceremony.
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- Proper Size: the jewelry lock case is 14 5/8in in length, 8 3/8in in width, and 1 3/4 in depth; The large capacity can accommodate most collections, such as knives, rings, gem, earring, bracelets, necklaces, medals, brooches and more
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Scarlett Johansson: De Beers Midnight Aura
Johansson’s De Beers Midnight Aura necklace was reported at 74.73 total carats. Her pear-shaped diamond stud earrings were reported at 9.58 carats. The figures are as reported by Natural Diamonds, not independently certified here.
Doja Cat: Messika Solar Diva
Doja Cat’s Solar Diva necklace included a 34-carat yellow cushion-cut diamond, according to Natural Diamonds. The roundup also identifies Pear Appeal earrings and a cushion-cut solitaire. A March 3, 2025 jewelry recap from A Diamond is Forever via PR Newswire also notes her Messika yellow-diamond necklace and earrings.
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Which other jewelry looks stood out?
Demi Moore: Chopard high jewelry
Moore wore Chopard earrings, a Garden of Kalahari wrap bracelet and a ring. Natural Diamonds reports 17.114 carats of diamonds in the earrings. Its bracelet description lists emerald-cut diamonds of 20 and 15 carats, alongside 31.64 carats of additional diamonds. The ring is described with a 10-carat oval white diamond and 5.7 carats of diamonds. The PR Newswire recap rounds the earrings to 17 carats and also highlights the bracelet; the more precise weights above are Natural Diamonds’ reported specifications.
Michelle Yeoh: Boucheron, with a necklace draped down her back
Yeoh wore Boucheron’s Plume de Paon asymmetrical earrings and ring, with a Quatre Radiant Edition High Jewellery tie necklace cascading down her back. That unusual placement gave the necklace a striking profile beyond a conventional front-facing drop.
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Rank #3
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Zoe Saldaña: Cartier Panthère
The Associated Press described Saldaña’s short Cartier panther necklace as combining emerald, onyx and diamonds. Vogue also identified the piece as a Panthère Versatiles necklace. Its appeal came from the contrast of colored stones and the panther motif rather than a published carat total.
Raye: Lorraine Schwartz ruby pendant
Vogue noted that Raye’s ruby pendant complemented her vermillion Vivienne Westwood dress. It was a vivid color pairing amid the red carpet’s many diamond looks.
Rank #4
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- Compact & Practical Size: Size 25x20x5cm (9.8"x7.9"x2"), this compact jewelry stand fits seamlessly on dressers, countertops, or display cabinets. Its lightweight yet robust build makes it easy to transport for trade shows or store rearrangements
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Which pieces brought vintage or archival history to the carpet?
Mikey Madison: Tiffany & Co. Archives necklace
Natural Diamonds describes Madison’s Tiffany & Co. Archives necklace as made between 1909 and 1919, with a 3.9-carat old European-cut center diamond. The documented period of the piece gave it a different kind of distinction from newly styled high jewelry.
Elle Fanning: circa-1958 Cartier choker
Fanning wore a Cartier High Jewellery diamond choker described by Natural Diamonds as dating to around 1958. The source reports more than 700 diamonds and approximately 49 carats.
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What made the jewelry feel extravagant?
There was no single formula. The red-carpet coverage showed four useful ways to compare the looks:
- Scale: Some pieces came with reported carat totals, including the necklaces on Jones and Johansson and the yellow diamond on Doja Cat. These figures describe reported specifications, not verified rankings of value.
- Silhouette and placement: Statement necklaces included drops and close-fitting collars, as well as Yeoh’s back-draped tie necklace. Earrings, cuffs, bracelets, rings and brooches supplied different focal points.
- Color and contrast: Doja Cat’s yellow diamond, Raye’s ruby pendant, Saldaña’s emeralds and onyx, and a black diamond ring worn by Kylie Jenner offered alternatives to white diamonds.
- Provenance: Madison’s archival Tiffany necklace and Fanning’s vintage Cartier choker made age and design history part of their impact.
Necklaces were a defining motif in the A Diamond is Forever recap. The AP’s broader account of the red carpet described an old-Hollywood glamour mood, quoting Harper’s Bazaar fashion news director Brooke Bobb: “The Oscars red carpet style really leaned into old Hollywood glamour, which is a trend that’s been building throughout the last year on the red carpet and on the runways,”
Vogue’s coverage also includes after-party jewelry, such as emerald- and onyx-accented looks; those are separate from the ceremony red carpet. Its gallery also notes men’s lapel brooches and a phoenix ring. For additional red-carpet selections, see British Vogue’s 2025 Oscars jewelry gallery and Vogue’s Oscars and after-party jewelry gallery.
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