9. Wallis Simpson’s Panther Bracelet
Made by Cartier Paris in 1952, the onyx and diamond panther bracelet sold at auction for $12.4 million. When the bracelet sold for this price, there were some small stones missing, so it was not sold in the best condition. The Panther bracelet was commissioned and originally owner by the Duchess of Windsor and American socialite, Wallis Simpson. Although the panther bracelet, which gets its name due to the bracelet being uniquely shaped like a panther, was bought by an anonymous buyer through Sotheby’s Auction, it has been rumored that Madonna was the one who bought the $12.4 million necklace.