|The 6.16-carat, pear-shaped, ‘Farnese Blue,’ is to be auctioned for the first time after three centuries in the hands of a European royal family. The Golconda diamond was first acquired by the family in 1715. It was a wedding gift to Elisabeth Farnese, then-queen of Spain, from the governor of the Philippine Islands.|
Over the next 300 years, the diamond was passed down to various descendants of the queen, including Spanish, French, Italian, and Austrian royalty. Estimate is US$3.7 million to US$5.3 million.