DiamondBuzz
Russia could buy more of Alrosa’s excess rough production
Russia’s finance ministry is thinking about buying more rough diamonds from Alrosa, the country’s biggest diamond mining company. This comes after Alrosa’s sales dropped by 42% in the first part of 2025, down to $709 million. The main reasons for this drop are Western sanctions, less demand for natural diamonds, and more people buying lab-grown diamonds instead.
Finance Minister Anton Siluanov said the government might buy Alrosa’s unsold diamonds for Gokhran, which is Russia’s state treasure of precious metals and gems. This isn’t the first time they’ve done this-Russia has bought diamonds from Alrosa before to help the company during tough times.
Alrosa’s sales have fallen sharply from $1.15 billion in Q1 2021, before the Ukraine conflict triggered sweeping G7 and EU sanctions. The company has responded by suspending operations at less profitable deposits and planning staff cuts as inventories and debt rise. Government support through Gokhran purchases could help stabilize the miner as market challenges persist.Because of these problems, Alrosa has also had to pause work at some of its less profitable mines and plans to reduce staff. Government support by buying diamonds could help Alrosa survive while the diamond market is struggling
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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