Sri Lanka is the largest producer of some of the valuable gemstones in the world. Sri Lanka’s oil is mineral rich, and as a result of that, it has become a repository of precious as well as semi-precious stones. This includes Ruby, Star Sapphire, Cat’s Eyes, Garnets, Zircons, and Spinels. The sapphires from Sri Lanka are extremely popular in the international market because of quality and their large sizes. Most of the Gems are produced in Ratnapura, which is why it is known as “City of Gems”.