Jewelry auctions in 2015 offered a tantalizing array of the exceedingly rare and one-of-a-kind, from large precious gemstones fetching prices in the multi-millions to highly covetable jewels of unmatched design. The most precious of gems – pink diamonds, pigeon’s blood rubies and large diamonds of sheer perfection – battled it out for the most expensive jewel sold at auction. The winner, however, was none of those; it was an even rarer sort of stone. The Blue Moon diamond, a 12.03-carat Fancy Vivid Blue diamond, shattered the competition – and records – in November at Sotheby’s Geneva, selling for $48.5 million and setting world record prices for a diamond, gemstone or jewel.

Without further ado, here are the top ten jewels sold at auction in 2015: