DiamondBuzz
Natural diamond prices stabilizing, recovering lies in the balance of macro-economic variables in major consumer markets
Through mid-February 2025, rough diamond prices are down a modest 1-2% year-to-date, according to the Zimnisky Global Rough Diamond Price Index. This follows an 18% decline in 2024 and a 15% decline in 2023. Rough prices are now down some 40% from the all-time high reached in the exuberant years of 2021 and 2022 where global diamond demand soared on the back of record economic stimulus in response to the pandemic.
The likelihood of natural diamond prices stabilising and subsequently recovering in 2025 and beyond lies in the balance of macro-economic variables in major consumer markets as well as more micro factors such as the magnitude and effectiveness of industry marketing and the trade’s ongoing efforts to positively differentiate its product from competing lab-grown diamonds.
Regarding the latter, potential catalysts include consumers’ (as well as jewellers’) dynamically changing perception of lab-grown versus natural diamonds at ever extreme price differentials and the industry’s aim to make easy-to-use consumer-facing natural diamond detection equipment ubiquitous in the consumer sphere
In the U.S., which represents over 50% of global consumer diamond jewellery demand, near-term macro drivers include the evolution of monetary policy, the impact of deglobalisation and the re-industrialisation of America under the new Trump administration.
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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