I don't know if the reputation of Siam Jewelry Center is better than that of Royal Center, but in Thailand, the reputation of royal jewelry can still be trusted, as long as it is not counterfeit. Your friend's expenses are not low, and whether his income is commensurate depends on the quality of the gem. The color must be red with a little blue. It's pigeon blood red. The particle size is several carats, the details of internal defects, whether it has been treated and so on. Just by- pigeon blood red diamond ring, RMB 20000 points. No one here can help you.