钻石价格大跌，十年前1.8万元买的钻戒，如今只能卖180元

Group 1 - The diamond industry is facing one of the most severe and prolonged crises in modern history, influenced by declining luxury consumption in major markets and the rising popularity of lab-grown diamonds [1] - De Beers, the world's largest diamond producer, has announced a price reduction for rough diamonds, reflecting a significant drop in global diamond market demand [3][5] - The price index for diamonds shows a notable decline, with 0.5-carat diamonds expected to drop over 20% in 2025, while larger diamonds (3 carats) show a slight decrease of 0.4% [3][4] Group 2 - De Beers has adopted a unified pricing policy for its auction, making it difficult to assess the exact price reduction, with industry insiders estimating a decrease of 10%-15% [3] - The company has accumulated over $2 billion in inventory, and the transaction rate at its auctions has been declining, indicating weak market demand [5] - The retail price of lab-grown diamonds has decreased significantly, with 1-carat lab-grown diamonds dropping from 8,000 yuan to 3,500 yuan, making them much cheaper than natural diamonds [13][17] Group 3 - The market for lab-grown diamonds has expanded rapidly, with their sales accounting for over 40% of the global diamond jewelry market by 2025, an increase of more than eight times since 2019 [12] - Young consumers represent about 70% of the buyers for lab-grown diamonds, indicating a shift in consumer preferences [15] - The production of lab-grown diamonds in China is expected to reach approximately 22 million carats in 2024, accounting for 63% of global output [15]