What is the Star of Sierra Leone diamond?

Nov 23, 2014 ... What we do know is that the amazing diamond was certified by the GIA as a 9.75 carat Fancy Vivid Blue Diamond – the highest color grading ... Apr 8, 2025 ... $100 million worth of world's rarest diamonds displayed at exhibition in Abu Dhabi ... “The principal reason for us being here is to unveil the ... Sep 14, 2022 ... The Koh-i-Noor (Mountain of Light Diamond) ... The most valuable diamond in the world is Koh-i-Noor, also spelled Koh-i-Nur and Kohinoor. The ... Sep 28, 2022 ... A rare deep earth diamond was unearthed from the Karowe mine. It was buried 660 kilometers beneath the surface of the Earth. Jan 27, 2025 ... Learn about natural red diamonds, the rarest diamond color. Explore their formation, value, and why they're the most expensive gems on Earth. We ... Apr 18, 2019 ... A diamond crystal in kimberlite. Suddenly diamonds became much more abundant than they ever had been. As every single stone mined could be used ... The House of Graff has been a custodian of many of the world's most celebrated gemstones – characterised by their unique quality, their historical provenance. It's called the Winston Red Diamond, and what makes it so exceptional is the nature of its redness. Designated as a “fancy red” by the Gemological Institute of ... Pure orange diamonds are the rarest colour diamonds of all. That also means they're among the most valuable diamonds in the world. It's estimated that only around 20 to 30 true gem-quality red diamonds exist in the world, some weighing less than one carat.