美媒：戴比尔斯集团下调钻石原石价格

Group 1 - The core viewpoint of the article is that De Beers Group has lowered diamond rough prices again after more than a year, influenced by a cooling luxury goods market and the rising popularity of lab-grown diamonds [1][3]. Group 2 - De Beers significantly reduced the prices of rough diamonds over 0.75 carats during a recent auction, although the exact reduction amount is unclear due to a new invoicing method that combines total prices instead of individual box pricing [3]. - The price adjustment is attributed to several factors, including the decline in global luxury goods consumption, the increasing trend of lab-grown diamonds, and the U.S. imposing tariffs on India, a major diamond processing country [3]. Group 3 - De Beers Group, founded in 1888 in London, was once responsible for about 90% of the global diamond supply market [5].