For example, four decades ago, fancy light pink diamonds cost $10,000 per carat, while in 2017, the estimated price per carat was $220,000. Vivid pink diamonds were sold for $50,000 per carat 40 years ago, while in 2014, the price was already $600,000 per carat. Nowadays, a high-quality intense pink diamond can cost up to $700,000 per carat.