Gem is very famous in Thailand and the country to the world, it is a ploy to Vientiane province of chanthaburi town, which is home to the largest number of countries and of the world.
Sapphire has a strong reputation in the country. And, as far as the Earth is a byproduct municipalities in the province of Chanthaburi. Which is the largest source of the country and the world.
A great reputation in the jewelry, and so far the world is the Gem City Chan ที่จังหวัดจันทบุรี. Which is the biggest source of the country and the world.