Emerald or crystal, just go to Donghai County, Lianyungang City. Shandong is not far. Very convenient. You should go to Donghai Crystal City and ask more questions. Some will bully foreign guests and ask for more expensive things. Generally, look at what others buy first, don't talk, just look around and ask the price the next day, so that you won't be cheated. Anyway, pay more attention to yourself and wish you a prosperous business.