The Sancy is one of the few historic diamonds with undisputed appearance and dimensions. It is also a very unique stone in that it has two crowns because neither side of the diamond possesses the characteristics of a true pavilion. You can add the Sancy diamond to your collection with a precise cubic zirconia replica from The Stonecutter.

Sancy Diamond Specifications

Diamond Weight:
Replica Weight:
Weight of Rough:
Date Found:
Current Location:
57.14 carats
108.86 carats
25.7 x 20.6 x 14.3 mm
Prior to 1570
French Crown Jewels, Louvre, Paris

Sancy Diamond History

While much is known about the Sancy diamond’s history, it is dotted with gaps where little is known about the owners or whereabouts of the stone. The first gap results from the lack of an authoritative account of the stone before 1570 when it was acquired by Nicolas de Harlay, seigneur de Sancy. Some sources say that a member of the Portuguese nobility took it with the rest of the Portuguese Crown Jewels when Spain threatened to overtake Portugal and sold the diamond in an attempt to gain allies in other European courts. Other sources say de Harlay, who served as French Ambassador to Turkey, bought it in Constantinople.

Regardless of how it came to de Harlay’s hands, sources agree that de Harlay sold the stone to James I of England circa 1605. Subsequent kings of England—Charles I and James II—possessed the stone, but James II, exiled and nearly destitute, sold it to Cardinal Mazarin in 1657. The Cardinal left the Sancy to the King of France upon his death in 1661. The Sancy was among the French Crown Jewels stolen in 1792, after which nothing is known about the diamond’s location until 1828.

In 1828, the Sancy was purchased by Prince Demidoff (var. Demidov), sold in 1865 to an Indian prince who sold it a year later. Nothing is known of the owner until 1867 when the Sancy appeared at the Paris Exposition, after which there is another 40-year gap in the Sancy’s history.

In 1906, the Sancy was purchased by William Waldorf Astor. The Astor family owned the stone until 1978 when the 4th Viscount Astor sold it to the Louvre where it is displayed next to the Regent diamond.

Add the Sancy Diamond to Your Collection

The Stonecutter offers museum-quality replicas that allow you to create a famous diamond collection that rivals many crown jewel collections. The Sancy is a must for any discriminating collector. Order your Sancy replica online, and contact us for recommendations for jewelers if you wish to set the piece.

Museum-Quality Diamond Replicas by Scott Sucher


For historic information, please visit Museum Diamonds

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