DiamondBuzz
Alrosa Uncovers Puppy-Shaped Diamond and Festive Bauble Stone Ahead of New Year
Recovered from the Lomonosov deposit in Arkhangelsk, the unusually shaped diamonds highlight the region’s reputation for rare and distinctive finds.
Diamond mining major Alrosa has reported the recovery of two unusually shaped diamonds ahead of the New Year, reinforcing the Arkhangelsk region’s status as a source of rare and distinctive stones. The diamonds were recovered at the Severalmaz enrichment plant at the Lomonosov deposit in Russia’s Arkhangelsk region.
The larger of the two stones, weighing just over 17 carats, bears a striking resemblance to a Christmas bauble, while the second diamond, weighing 2.7 carats, is naturally formed in the shape of a puppy. The festive and figurative appearance of the stones makes them notable additions to Alrosa’s portfolio of unique diamond recoveries.
The diamonds originate from the Arkhangelsk diamond field, which comprises six kimberlite pipes and is widely recognised for producing diamonds with rounded contours and unusual natural shapes. The geology of the region has historically yielded stones that stand out for their distinctive morphology.
In recent years, the field has produced several remarkable discoveries. These include a 38-carat diamond named “Moroshka” recovered in 2024, as well as a 39.98-carat butterfly-shaped diamond found in 2022. Such finds have underscored the Lomonosov deposit’s reputation for delivering diamonds with rare and visually striking natural forms. Alrosa noted that discoveries like these continue to demonstrate the diversity and uniqueness of diamonds recovered from the Arkhangelsk region, particularly during seasonal recovery periods toward the end of the year
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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