Florentine Diamond

Common card · No. 417913

The Florentine Diamond is a large diamond, known for its long association with European royalty. A possession of the House of Habsburg-Lorraine since 1737, it was widely thought to have been lost in the aftermath of the fall of the Austro-Hungarian Empire in 1918, but was revealed in November 2025 to have remained with the family in secret. Reportedly of Indian origin, the Florentine Diamond is light yellow in colour with very slight green overtones. It is cut in the form of an irregular (although very intricate) nine-sided 126-facet double rose cut, with a weight of 137.27 carats (27.454 g). The stone is also known as the Tuscan, the Tuscany Diamond, the Grand Duke of Tuscany, the Austrian Diamond, Austrian Yellow Diamond, and the Dufner Diamond.

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