DiamondBuzz
Anglo American reshapes leadership as it narrows focus; De Beers CEO retains key role
Anglo American has announced a streamlined executive leadership structure as it continues to sharpen its focus on core businesses, including copper, iron ore, crop nutrients—and diamonds through De Beers Group.
While the company has completed the demerger of Valterra Platinum and is exiting steelmaking coal and nickel, De Beers remains strategically significant. Al Cook, CEO of De Beers Group, will continue to be part of Anglo American’s executive leadership team until the planned separation of the diamond business progresses further.
From 1 July, Al Cook will continue to represent De Beers at the group’s top level, reinforcing its integral role during this transitional phase.
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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