Tereshchenko-Mouawad Blue Diamond

The origin of this exceptional stone remains a mystery, and experts are not able to determine where it was discovered. Tereshchenko Blue most probably comes from India and, like in the case of the famous Hope diamond, was discovered in Golconda, in the Kollur mine. Weighing 150 ct, the rough stone was to be secretly sent to Russia at the special request of Michail Tereshchenko, a rich industrialist.

Somewhere around the year 1914, Michail deposited the stone in Cartier's Parisian office and asked for it to be cut. One year later, the stone, cut in a pear shape and weighing 42.92 ct in the colour of fancy blue, was placed in a gorgeous necklace made of forty six colourful diamonds weighing between 0.13 and 2.88 ct. The necklace made at the request of Tereshchenko remains one of the largest orders in Cartier's history to this very day.

In the thick of the revolution, after Tereshchenko's escape from prison, the diamond left Russia, and it probably made its way to Norway. Its story remained unknown for several decades. In November 1984, it reappeared at Christie's auction in Geneva, where it was sold to a collector and businessman from the jewellery industry, Robert Mouawad, for USD 4.6 million. Its name was changed by the owner to Mouawad Blue, and the stone joined the billionaire's stunning private collection. It is estimated that the current value of the Tereshchenko diamond may be up to ten times greater that the amount which was paid by Mouawad. 

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