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Jessica Chastain wore a stunning Chopard necklace from their 'Haute Joaillarie' collection, featuring 40.72 carats of pear-shaped fancy yellow diamonds and 51.50 carats of pear-shaped diamonds, alongside an 18-carat white gold ring from the 'Temptations' collection that boasts pink quartz, rubellites and diamonds.
Bvlgari ambassador Zendaya paired her break-the-internet dress with the serpent-shaped Hypnotic Emerald necklace, from the fine jeweller's recent 'Magnifica' high jewellery collection, and a matching emerald and diamond ring. Altogether, the actress's jewellery totaled 131.56 carats of emeralds and 62.69 carats of diamonds.
Timothee Chalamet made the case for men's jewellery in vintage Cartier as the House's newest friend. He wore an onyx and diamond brooch and two rings on the Dune red carpet.
Penelope Cruz completed her Chanel princess look with pieces from the brand's high jewellery collection, including delicate diamond drop earrings and the Jazz bracelet in 18k white gold, diamonds and black spinels from the 'Cafe Society' collection.
Cynthia Erivo paired her own antique ring with jewel drop earrings from Roberto Coin.
Italian actress Alice Pagani donned several white gold Serpenti pieces from Bvlgari, including a diamond watch and a ring with diamonds and emeralds, which she paired with a Fiorever ring and Serpenti Viper ring.
Adriana Lima took to the red carpet in Chopard earrings featuring 5.07 carats of rubies and diamonds from the 'Precious Lace' collection and a diamond ring from the 'L'Heure du Diamant' collection.
Anya Taylor-Joy glittered in Tiffany & Co. jewels, wearing a Schlumberger Monarque necklace paired with diamond earrings and a stackable array of Schlumberger, Tiffany Victoria and Tiffany T rings.
Tiffany Haddish wore Pomellato's chain link necklace pave-set with white diamonds and matching earrings from the brand's high jewellery collection.
Penelope Cruz wears shoulder-skimming Rosee de Camelia earrings from Chanel's high jewellery collection, featuring 18k white gold, cultured pearls and diamonds.
Another man in Cartier, Chang Chen styled a vintage 1962 star brooch in 18k yellow gold and 18k pink gold with a vintage 2013 ring featuring platinum, diamonds, emeralds and onyx.
Kristen Stewart wore a Chanel diamond choker featuring the brand's signature Camelia flower from its fine jewellery collection.
Italian model Mariacarla Boscono, who was also the face of Cartier's 2018 Cactus de Cartier campaign, chose a statement emerald and diamond necklace and matching ring for opening night.
Actress Serena Rossi adorned herself with matching high jewellery pieces from Cartier—including an 18k white gold necklace and ring set with emeralds, onyx, crystal rock and diamonds.
Zendaya stacked up Bvlgari's rings for the Dune press conference, wearing a platinum high jewellery piece featuring an intense yellow diamond and two trapeze diamonds with Serpenti Viper rings and the classic B.zero 1 rings.
Film, fashion and shining stars! It's the last day of the 78th Venice Film Festival and what better way to round things off than by rounding up the very pieces that made the red carpet glimmer? Click through to see the head-turning jewellery moments seen throughout the 11-day event, from Zendaya's emerald diamond snake necklace by Bvlgari to the range of Chanel fine jewellery pieces adorned by Penelope Cruz.