The Kimberley Process (KP), a coalition of governments, the diamond industry and civil society representatives responsible for certifying diamonds as conflict-free, is split over a push to expand its definition of conflict diamonds to include those funding aggression by states.
Russia - which invaded Ukraine four months ago - holds a 33% stake in Alrosa, which accounted for about 30% of the world's diamond output last year.
"When you see Bucha, Irpin, Gostomel, all those atrocities [...] I think they should think twice when they are buying diamonds that can be of origin of Russia, because they are basically sponsoring the killings," Ukraine's ambassador to South Africa, Botswana and Mozambique Liubov Abravitova told Reuters.
Ukraine has accused the Russian military of executing residents of Bucha, a town outside the capital Kyiv that Russian troops had occupied for several weeks before withdrawing, where images of corpses scattered in the streets drew widespread condemnation from the West.
Russia has denied targeting civilians during what it calls a "special military operation" in Ukraine, and has rejected allegations that its forces have committed war crimes.
An Alrosa spokesperson said: "At the KP Intercessional meeting in Kasane that was held this week Russia's delegation provided a detailed and comprehensive response to all groundless allegations."
Russia's KP envoy did not respond to a request for comment.
Russia's deputy finance minister Alexey Moiseev said in a May 20 letter that the situation in Ukraine has no implications for the Kimberley Process and is "absolutely beyond the scope" of its certification scheme.
Australia, Britain, Canada, the European Union, Japan, Switzerland, the United States and civil society groups supported Ukraine's push to discuss Russia at the KP meeting in Botswana, but were met with opposition.
Belarus, China, Central African Republic, Kyrgyzstan, and Mali explicitly backed Russia within the KP, while Angola signaled its support by leading applause after Russian delegates spoke, two sources at the meeting said.
Because it makes decisions by consensus, the rift over Russia risks rendering the KP ineffective. Civil society and some state participants are calling for the decision-making process to be reformed, and the leading diamond industry group on Friday acknowledged the push for change.
"There seems to be strong support for further reforms, including that of the conflict diamond definition," World Diamond Council president Edward Asscher said during the closing ceremony of the KP meeting in Kasane, northeastern Botswana.
Consumers' growing demand for clarity on the origin of diamonds will likely put pressure on the KP to make reforms, Abravitova said.
A three-yearly review of the KP certification scheme is due next year, and reforms will be discussed at the KP's plenary meeting set for November, Jacob Thamage of Botswana, the KP's current chair, said.
Reuters, the news and media division of Thomson Reuters, is the world's largest multimedia news provider, reaching billions of people worldwide every day.Go to: https://www.reuters.com/