This pin was created to use a pear-shaped blue diamond that is easily detachable from it. It weighs 6.16 carats, its hue is fancy dark grey-blue in SI1 clarity.
The plaque indicates the origin and provenance of the diamond. It was given by the Philippine Islands to Elisabeth Farnese, Queen of Spain, wife of Philip V of whom the author of the inscription was a great-grandson, the Comte de Villafranca.
This colonial provenance appears to be certainly a wedding present. In 1714 Elisabeth from the reigning family of Parma marries the newly widowed king. Gifts are needed and the colonies are solicited. The American cargo is lost in the Atlantic in August 1715 with fabulous emeralds.
At that date Golconda is still the only source for diamonds. The Farnese Blue has in common with the Wittelsbacher Blue that it does not fall into the most usual categories such as fancy vivid, fancy intense or fancy dark blue.
Comte de Villafranca is the title used by Duke Charles II of Parma after his abdication. He seems to be the first of his line to be interested in this diamond and it is certainly he who had created the pin.
His grandson Robert integrated the Farnese Blue within a diadem composed of diamonds coming according to family tradition from the French queen Marie-Antoinette. This use in the diadem is confirmed later in an inventory of the jewelry owned by his daughter-in-law the archduchess Maria Anna of Austria. It was later reunited with the pin.
SOLD for CHF 6.7M including premium
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