DiamondBuzz
Lost Florentine Diamond Resurfaces in Canada After a Century, Tracing Its Glittering Origins to India’s Golconda Mines
Once a royal treasure of the Medici and Habsburg dynasties, the 137.27-carat gemstone reemerges in a Montreal vault, reaffirming India’s Golconda as the cradle of the world’s most storied diamonds.
The legendary Florentine Diamond — a 137.27-carat light yellow gemstone believed to have originated from India’s famed Golconda mines — has been rediscovered in a Canadian bank vault, ending over a hundred years of intrigue surrounding its disappearance.
According to recent reports, the diamond—once among Europe’s most celebrated royal jewels—was located in a vault in Montreal, safeguarded for decades by descendants of the Austrian imperial Habsburg family. The gemstone vanished after the fall of the Austro-Hungarian Empire in 1918, following Emperor Charles I’s exile, sparking decades of speculation over its fate — whether it was stolen, lost, or secretly sold.



Historians now confirm that Empress Zita, widow of Charles I, discreetly transferred the diamond to Canada during World War II for safekeeping. Its authenticity was recently verified by a European jewellery house that historically served the Habsburg court, confirming the gem’s provenance and preservation.
Renowned for its pale yellow hue and unique double-rose cut with 126 facets, the Florentine Diamond boasts a storied history — from its origins in India’s Golconda mines, to the Medici treasury in Florence, and later as part of the Austrian Crown Jewels in Vienna.
Its rediscovery has reignited global fascination with India’s gem legacy, which gave birth to other iconic diamonds like the Koh-i-Noor, Hope, and Nassak. Experts say the find underscores the importance of provenance and gem heritage in an increasingly globalised jewellery market.
The Habsburg family has announced plans to publicly exhibit the diamond in Canada next year, with potential displays in Europe to follow.
After more than a century of obscurity, the reemergence of the Florentine Diamond not only restores a lost royal masterpiece but also revives India’s enduring connection to the world’s most illustrious jewels.
DiamondBuzz
CVD Synthetic Fashioned To Imitate A Rough Natural Diamond
The Near-Colorless Stone Is Believed To Be The First Time Creators Of A Synthetic Chemical Vapor Deposition (CVD) Diamond Have Shaped It To Resemble A Rough Diamond
The 6.87-carat near-colorless CVD diamond was shaped to resemble a natural rough octahedral crystal but showed distinct synthetic features under microscopic and spectroscopic analysis.GIA’s tests confirmed the stone’s synthetic origin, noting polishing marks, facet junction roughness, and luminescence patterns inconsistent with natural diamonds.
No evidence currently suggests widespread substitution of synthetics for rough natural diamonds, but existing detection tools could be adapted if such cases increase.
The near-colorless stone is believed to be the first time creators of a synthetic chemical vapor deposition (CVD) diamond have shaped it to resemble a rough diamond, according to an article in the spring issue of the institute’s Gems & Gemology quarterly journal.
Upon investigation with the use of raman spectroscopy, the results confirmed that the material was a diamond, with its near-octahedral shape similar to that of a natural rough crystal. Further analysis showed that it was not a true octahedron, as only one set of opposing faces was parallel. Microscopic observation under differential interference contrast revealed extremely flat faces marked mainly by parallel polishing lines, unlike the growth steps and trigons typically seen on natural octahedral faces. The facet junctions were extremely rough, possibly due to measures taken to improve the color, after which the main faces appear to have been repolished, the institute explained.
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