We've noticed Serena Williams's love of diamonds before but the tennis champ topped herself this time, showing up at a post-match press conference in a Diamond Necklace worth $2.5 million.

Williams wore the 427-diamond Necklace after her first round win over Australian Samantha Stosur at the Sydney International tournament. Williams had met with a jewelry designer in Sydney over the weekend who offered her the pricey piece to wear during a match.

She decided not to play with the necklace because she was too concerned about what would happen to it but decided to wear it to the press conference instead.