News Awards & Events Oscars Best Jewelry By InStyle Editors InStyle Editors Facebook Instagram Twitter Our editors and writers comprise decades of expertise across the beauty, fashion, lifestyle and wellness spaces in print and digital. We prioritize journalistic integrity, factual accuracy, and also having fun with every story we share. InStyle's editorial guidelines Updated on March 31, 2015 @ 03:34PM Pin Share Tweet Email Trending Videos Photo: Frazer Harrison/Getty Images Best Jewelry 01 of 10 Zoe Saldana in Lorraine Schwartz Jose Flores/Landov Avatar star Zoe Saldana complemented her Givenchy couture gown, which featured multiple tones of purple, with a tonal 80-carat amethyst ring custom-made by Lorraine Schwartz. 02 of 10 Maggie Gyllenhaal in Fred Leighton John Shearer/WireImage; Alberto E. Rodriguez/Getty Images Maggie Gyllenhaal accented the painterly print of her Dries Van Noten gown with colorful (and mismatched) Fred Leighton bracelets. "Some people might have thought wearing both of these was too much, but I think they look beautiful together," said the actress. On her left wrist, Gyllenhaal wore a '40s-era yellow gold and diamond cuff (inset), while her right wrist sparkled with a diamond bracelet featuring a '20s cabochon emerald, sapphire and diamond brooch. 03 of 10 Miley Cyrus in Lorraine Schwartz Steve Granitz/WireImage Miley Cyrus accented her stripped-down Jenny Packham gown with bold bronzed diamond and ruby flower earrings, a 10-carat natural ruby ring and a 200-carat bronzed diamond corset cuff, all from Lorraine Schwartz. 04 of 10 Sarah Jessica Parker in Fred Leighton Jason Merritt/Getty Images Sarah Jessica Parker paired her pale yellow silk Chanel gown with standout jewels from Fred Leighton, including an eclectic stack of bangles (featuring a 1950s diamond swirl bracelet, cognac diamond flexible bracelet, rose-cut diamond bracelet in platinum and sapphire and diamond wave bangle bracelet) and a moon-shaped 9-carat cushion-cut diamond ring. Rounding out the collection was a pair of flower-shaped 19th-century diamond earrings. 05 of 10 Demi Moore in Van Cleef & Arpels John Shearer/WireImage Demi Moore 's strapless Atelier Versace gown and chic updo perfectly showcased her pearl tassel, diamond and sapphire drop earrings from Van Cleef & Arpels. The stunning pair, which came from the jeweler's "Les Jardins" collection, took 115 hours to create. 06 of 10 Rachel McAdams in Lorraine Schwartz Fame Pictures Rachel McAdams drew all eyes upward with show-stopping statement earrings by Lorraine Schwartz. The cluster design combined 145-carats of rose-cut multicolored diamonds. 07 of 10 Carey Mulligan in Fred Leighton John Shearer/Getty Images First-time nominee Carey Mulligan framed her face with shoulder-dusting 19th-century diamond pendant earrings from Fred Leighton. 08 of 10 Kate Winslet in Tiffany & Co. Steve Granitz/WireImage Kate Winslet graced her Atelier Yves Saint Laurent gown with a one-of-a-kind yellow diamond necklace created exclusively for the actress by Tiffany & Co. The art deco-inspired piece, which is worth $2.5 million, matched the star's $975,000 canary diamond drop earrings. 09 of 10 Diane Kruger in Chanel Fine Jewelry Landov Crafty Diane Kruger secured her locks with a camellia-shaped black and white diamond brooch from Chanel Fine Jewelry. 10 of 10 Amanda Seyfried in Lorraine Schwartz Frazer Harrison/Getty Images Amanda Seyfried matched the drama of her Giorgio Armani Prive gown with a trio of Lorraine Schwartz cognac, champagne and mint-hued diamond cuff bangles (totaling a whopping 250 carats!).