(GENEVA) — Sotheby’s says a rare blue diamond has sold for a record 48.6 million Swiss francs ($48.5 million) at a Geneva auction, including fees. The 12.03-carat ‘Blue Moon’ Diamond is said to be among the largest known fancy vivid blue diamonds and was the showpiece gem at Wednesday’s auction. The price fell within the pre-auction estimate of $35-$55 million.