The document lists and describes the 5 priciest diamonds in the world by weight and estimated value: 1) The Koh-i-Noor Diamond weighing 105.60 carats. 2) The Sancy Diamond weighing 55.23 carats with an unknown value. 3) The Cullinan Diamond valued at $400 million and weighing 3,106.75 carats. 4) The Hope Diamond weighing 45.52 carats and valued at $350 million. 5) The De Beers Centenary Diamond weighing 273.85 carats and valued at $100 million.