DiamondBuzz
EU opts against tariffs on US Diamonds
In a welcome move for Belgium’s diamond industry, the European Council has officially decided not to impose import tariffs on polished diamonds originating from the United States. The decision, hailed as a strategic and balanced one, comes amidst a broader framework of EU countermeasures in response to tariffs introduced by the U.S. during the Trump administration.
The Antwerp World Diamond Centre (AWDC), which represents the interests of the Belgian diamond industry, has applauded the EU’s stance. Karen Rentmeesters, CEO of AWDC, emphasized the importance of this decision, highlighting the potential economic fallout had tariffs been implemented.

“We are extremely pleased and grateful that our efforts over the past weeks have led to the European Council’s decision not to impose tariffs on US diamonds,” said Karen Rentmeesters. Rentmeesters expressed appreciation for the coordinated support from the Flemish and Belgian governments, as well as the EU, in safeguarding the industry’s interests.“This decision demonstrates that the Flemish and Belgian governments, as well as the EU, recognise and actively support both the strategic importance of the diamond sector in Belgium and the principle of free trade in diamonds.”
The United States remains a crucial trading partner for Belgium, accounting for nearly $3.9 billion in polished diamond trade annually — approximately 16% of the country’s total diamond trade. Antwerp, as the epicenter of Belgium’s diamond industry, relies heavily on the fluid movement of diamonds across borders, particularly with the U.S.
Rentmeesters noted that the diamond trade often involves multiple transatlantic shipments, especially for processes like grading and certification performed at U.S.-based labs. Tariffs could have resulted in double taxation — once upon entering the U.S., and again on re-entry into the EU — severely affecting profitability and logistics.
The AWDC also questioned the effectiveness of reciprocal tariffs as a political or economic tool, arguing that such measures would have little to no tangible impact on the U.S., while severely disrupting Belgium’s diamond sector.
Another complexity lies in the origin-based nature of import tariffs in the diamond industry. Since most polished diamonds are not cut in the U.S., any tariffs targeting “US diamonds” would only affect a small fraction of the trade. Nevertheless, enforcement would necessitate rigorous documentation and inspections, resulting in increased administrative burdens and shipment delays.
She concluded with optimism, calling for continued dialogue and negotiated resolutions to broader trade disputes, while encouraging the EU to maintain its measured and trade-friendly policies moving forward.
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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