DiamondBuzz
US Diamond Rules Signal Move to Traceability
New requirements to state “country of mining” leave a lot of unanswered questions.
The diamond industry was in mild shock when news came through of the latest US import requirements. Customs and Border Protection (CBP) said it would be obliging companies to state the “country of mining” when importing diamonds from April 2025. This puts a burden on the trade to step up its traceability efforts.
The new rules emerged quietly in stages. On October 22, 2024, CBP gave 60 days’ notice about the plan and requested comments by December 23. Few in the industry even saw this. Then the federal agency published a Trade User Information Notice, labeled “Last updated: January 14, 2025.” It distributed this in a bulletin on January 23.
The details remain unclear. The directive does not mention carat sizes, though the US’s ban on Russian diamonds has applied to 0.50-carat and larger diamonds since September 1, 2024.
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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