Ранее известный как "Цейлон", Sri Lanka is rich in gem resources and is one of the world's five largest gem producers. Он известен как "Остров драгоценных камней". Исторически, employees in Sri Lanka's gems and jade often accounted for 1/3 of the country's population. The country's gem resources are rich, разнообразный, широко распространенный, shallow [...]
