How the world’s two biggest diamond companies are plotting against the rise of lab-grown gems: ‘Buyer beware’ By Lisa Fickenscher Published June 12, 2024, 6:07 a.m. ET ...

When the world’s most important diamond buyers arrived at De Beers’ offices in Botswana late last month, they were presented with a rare offer by their host: the option to buy nothing at all.

Yet its marketing muscle has atrophied. The Natural Diamond Council, a coalition of firms formed in 2015 to pool hawking resources, has lost the help of Alrosa, a big Russian miner under sanctions.