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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.

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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

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DiamondBuzz

Rio Tinto’s Diamond Division Posts $79 Million EBITDA Loss in 2025

Higher output from Canada’s Diavik Diamond Mine offsets revenue decline, but end-of-life pressures continue to weigh on performance.

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Rio Tinto reported a challenging year for its diamond business in 2025, posting an underlying EBITDA loss of $79 million despite improved revenues. While the loss narrowed compared to the $115 million deficit recorded in 2024, the division remained under pressure amid a global diamond market slowdown and the nearing closure of its last active mine.

Annual revenue rose 19% to $332 million, supported by stronger production at the Diavik mine in Canada, Rio Tinto’s only remaining diamond operation. Output climbed 61% to 4.4 million carats, driven by the ramp-up of mining activities in the underground section of the A21 deposit, which began scaling up in late 2024.

However, the A21 underground ore body is expected to be depleted by the end of the first quarter of 2026, marking the end of Diavik’s operational life. The company plans to spend approximately $1 billion this year on closure activities related to Diavik, as well as rehabilitation work at the former Argyle Diamond Mine, which ceased production in 2020, and other non-diamond projects.

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