Famous gems are renowned for their beauty, rarity, and historical significance. Notable examples include the Hope Diamond, known for its deep blue color and storied past, and the Koh-i-Noor, a large diamond that has been part of various royal collections. These gems often carry legends and are sought after by collectors and museums alike. Another famous gem is the Star of Africa, the largest clear cut diamond in the world, which is part of the British Crown Jewels. Additionally, the Pink Star diamond, celebrated for its vibrant color, fetched a record price at auction. Each of these gems tells a unique story through its journey and ownership.