DiamondBuzz
Angola’s Diamond Output Surges Past Targets as Catoca and Luele Mines Drive Growth
Angola’s diamond sector delivered a robust performance in the first half of the year, with production surpassing expectations despite global market headwinds. According to state-owned miner Endiama, total diamond output reached 6.8 million carats during the period, exceeding planned targets.
The surge was led by the Catoca mine, which recorded production levels over 40% above its expected range, and the Luele deposit, which achieved a 35% year-on-year increase. Together, the two major operations contributed 91% of Angola’s total diamond output in the first six months.
From January to September, Angola produced 10.7 million carats, achieving 72% of its annual goal of 14.8 million carats, with Endiama confident of surpassing this target by the end of 2025. The country has also invested $216 million into its diamond sector, with a major share directed toward expanding the Luele project, which is currently ramping up production.
Despite a challenging market environment, Endiama reported exports of 8.2 million carats of rough diamonds in the first half of the year at an average price of $97 per carat, totaling $790.4 million in sales. Buyers from the United Arab Emirates (UAE), Belgium, and Hong Kong accounted for more than 90% of exports. While export volume rose 109% year-on-year, total sales value declined 14% due to softer global prices.
“Projections for the end of 2025 are encouraging,” Endiama added. “Global rough-diamond production is estimated to fall below 100 million carats, interrupting the growth trend of the last decade. This scenario favors countries like Angola, which stands out for its supply of gem-quality diamonds.”
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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