DiamondBuzz
US Jewellery Industry faces $117 Billion threat amid proposed diamond tariffs
The World Diamond Council (WDC), representing the global natural diamond value chain, has raised concerns over proposed U.S. tariffs that could place the $117 billion American jewellery industry at significant risk. In a formal appeal, the WDC urged the U.S. Administration to exempt natural diamonds (HS Codes 7102.10 and 7102.31) from the ongoing tariff review and include them in Annex II, citing their critical role in the nation’s economic and manufacturing sectors.
Natural diamonds, though not produced in the U.S., are essential to the health of the domestic jewellery market — a sector supporting over 200,000 American jobs and generating over $91.5 billion in annual sales. The combined impact of jewellery manufacturing and exports adds another $25.5 billion to the economy each year.
The WDC warns that tariffs on natural diamonds would effectively act as a consumption tax, raising prices on popular items like engagement rings and anniversary jewellery, placing additional financial strain on American families. Retailers are already experiencing inventory concerns, with inflationary pressures beginning to impact consumer prices.

“A tariff would destabilize the supply chain, weaken U.S. manufacturing competitiveness, and increase costs for consumers,” said Feriel Zerouki, President of the World Diamond Council. “We support the U.S. Government’s goal of fair trade, but urge an exemption for natural diamonds to protect jobs, competitiveness, and consumer access.”
The United States is the world’s largest consumer of natural diamond jewellery. The WDC emphasized that continued access to these goods is vital to preserving the innovation, craftsmanship, and entrepreneurship that define the American jewellery industry.
WDC members are actively engaging with U.S. officials, calling for a collaborative resolution that supports fair trade without undermining one of America’s most valuable consumer markets.
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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