Precious gemstones from Sri Lanka
17/07/2015 · . Sri Lanka ranks with Myanmar, Brazil, South Africa and Thailand as one of the world's most important gembearing nations. Although Sri Lanka is largely known for precious sapphires and rubies, the main types of gemstones found in Sri Lanka belongs to five major egories, which are; corundum, chrysoberyl, spinel, garnet and tourmaline.. The group Corundum contains some of the .