DiamondBuzz
Rio Tinto Reports 37% Drop in Diamond Revenue for 2024
Challenges at Diavik mine and broader market conditions lead to significant financial loss in Rio Tinto’s diamond segment.
Rio Tinto’s diamond revenue for 2024 fell by 37% to $279 million, largely driven by difficulties at its Diavik mine in Canada and the broader downturn in the diamond market. The company reported a loss of $127 million for the diamond segment, a sharp contrast to the previous year’s underlying earnings of $26 million. Despite the tough market conditions, Rio Tinto reaffirmed its focus on responsible sourcing and operational efficiency as key priorities moving forward.
The year was further marked by a tragic incident at the Diavik mine, where several team members were among the victims of a plane crash in January. This added to the operational challenges faced by the company during an already difficult period. Despite these setbacks, Rio Tinto has emphasized its commitment to managing the operation responsibly and efficiently, as it navigates the ongoing industry challenges.
With a challenging market outlook and operational difficulties, Rio Tinto continues to focus on adapting to market conditions while upholding its dedication to sustainable and ethical practices in diamond mining.
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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