Princess Eugenie of France's Feuilles de Groseillier diamond brooch, which hasn't been seen at auction for more than 125 years, sold at Christie's sale of Magnificent Jewels this autumn for $2.33 million.

Princess Eugenie of France's Feuilles de Groseillier diamond brooch, which hasn't been seen at auction for more than 125 years, sold at Christie's sale of Magnificent Jewels this autumn for $2.33 million.