It's good to have a certificate. The landlord can check the authenticity of the product with the certificate, or check the authenticity of the unit that issued the certificate. .

In fact, even if the landlord's picture is big and clear, it is difficult for others to judge the value. Transparency, purity, color matching, cutting, modeling, etc. All gems will affect their value. Grading and layering need the help of a microscope. How can a picture explain so many problems?

I checked that the exchange rate of Thai baht to RMB is 100: 19, so the ring is about 60,000 RMB. It is said that such a large piece of 60 thousand high-purity real stone is not expensive.