The most expensive object ever sold at auction in the category of objects is the Pink Star diamond. This rare and flawless pink diamond weighs 59.60 carats and was sold for a staggering $71.2 million at a Sotheby's auction in 2017. The diamond, known for its intense pink color, was originally mined in Africa in 1999 and took several years to cut and polish into its final form. Its sale price set a new record for any diamond or gemstone sold at auction.
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