Sapphire is the national treasure of Sri Lanka. In 2003, the pure and transparent dark blue sapphire was valuable. Sri Lanka is the largest first-class blue sapphire supplier in the world.

Sri Lanka is one of the countries with the largest variety of precious stones, with more than 60 semi-precious stones and all-precious stones, which are extremely rich in color and pure in texture. Generally speaking, China tourists will buy sapphires, cat's eyes and Star Sapphire.

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90% of Sri Lanka's territory is distributed with gem-producing parent rocks (Precambrian highly crystallized metamorphic rocks), but there is no gem mine in Jaffna Peninsula, the home of LTTE.

Ratnapura area is the main producing area of precious stones within 2000 square kilometers. Ratnapura is located in the mountainous area 64 kilometers southeast of Colombo, the capital. In Ratnapura of Sinhalese, "Ratnapura" means "gem" and "Pule" means "city", which together means "gem city".

The ancient riverbed of Karoo River, which is divided into two parts in Ratnapura, breeds one-third of the country's gems and is the largest gem mining area in Asia. The 563-carat "Star of India", the world's largest sapphire currently monopolized by the new york Museum of Natural History, comes from here.

In the early 1980s, the 362-carat "Star of Sri Lanka", the third largest sapphire in the world, was also produced here. As a national treasure, it is collected in Colombo National Museum.

In addition, there is also a gem mining area in the north of the Buddhist holy city of Kandy: Elahra, which is dominated by sapphires and is also the main producing area of big gems.

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