Blue diamonds have been the subject of fascination – and huge valuations – for centuries due to their rarity. This one only recently came to light.
Described as “property of a princely family” Sotheby’s notes, “A historic and highly important Fancy Dark Grey-Blue diamond weighing 6.16 carats, given by the Philippines to Elisabeth Farnese (1692–1766) Queen of Spain, by marriage to King Philip V (1683–1746), will be offered for sale on this occasion, along with other exceptional jewels. With a pear-shaped fancy dark grey-blue diamond weighing 6.16 carats, within a frame of pinched-collet set cushion-shaped diamonds, fitting detachable, fitted case with a plaque mentioning the provenance of the stone. Accompanied by GIA report no. 5181115824, stating that the diamond is Fancy Dark Grey-Blue, Natural Colour, SI1 Clarity.” The pre-auction estimate (this goes under the hammer May 15 in Geneva) is CHF3,500,000 — 5,000,000.