In 2014, the 5.5-carat Ocean Dream sold for about $8.5 million; in May 2026 the same blue-green diamond, the largest of its kind known, sold at Christie’s Geneva for $17.3 million, roughly double
Ocean Dream, a unique blue-green diamond weighing 5.50 carats, was auctioned at Christie's Geneva for $17.3 million. This diamond, initially sold in 2014 for approximately $8.5 million, experienced a…
