If you buy it from a tour group, it is 100% fake, especially in the so-called Royal Jewelry Center. You can subtract one digit from the price of the ring you bought. Of course, the so-called fake does not mean that he is not a ruby, but that the quality of the gem is not worth that much money. After heat treatment and dyeing, it has lost its natural characteristics and has no collection and appreciation value. Buying rubies in Thailand is generally about $0/000 per carat/kloc (wholesale price), and the price varies according to the quality, but you must buy a certificate, which must be an internationally certified certificate such as GRS (of course, it may also be a fake GRS certificate, and you must understand it before you can buy it). Generally speaking, don't buy precious stones when traveling, especially expensive ones. If you want to buy it, you must be accompanied by local friends. For example, if I take you to buy gems, you will die in the jewelry trading building on Longlu Road. Although it is also a mixed place, as long as the documents are authentic, the quality is guaranteed and the price is cheap.