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Russian diamond producer Alrosa has announced that both its mining operations and diamond production remained carbon neutral throughout 2025. This is the second year in a row that the company has received internationally recognized certification confirming its carbon-neutral status. Alrosa reported that it further reduced its greenhouse gas emissions during the year while increasing the amount of carbon absorbed through its mining activities. According to the company, its mining and production sites absorbed 126,000 tonnes more carbon dioxide equivalent (CO₂e) than they emitted in 2025....

London Jewels Auction Garners $9M at Christie’s A 66.40-carat fancy orange-brown diamond pendant was among the standout lots at Christie’s London Jewels auction on June 5, significantly surpassing expectations. The pendant features a briolette-cut, type IIa diamond with I1 clarity, accented by round white diamonds. Estimated to sell for up to GBP 150,000 ($200,121), it ultimately achieved GBP 355,600 ($474,419), more than twice its top estimate. The auction generated a total of GBP 7.1 million ($9.4 million) from the sale of more than 190 lots....

A 6.59-carat sapphire ring emerged as the standout lot at Heritage’s recent jewelry auction in Dallas, Texas, achieving more than three times its top estimate. The ring features an octagonal Kashmir sapphire flanked by two trapezoid-cut diamonds. It sold for $906,250 against a high estimate of $300,000 at the May 4 Spring Fine Jewelry Signature Auction, according to Heritage. Several other pieces at the event also significantly exceeded their projected values. Overall, the auction achieved $9.7 million in sales, setting a new record for the...