First of all, do you know anything about gems? Let me ask you again, do you know anything about crystals? You like it, you know it first, right? Do you prefer its color or texture? Therefore, if you like it, you must first understand and pay attention to the channels. It's true that it's sometimes prudent to pay tuition fees, but first you have to have some knowledge about jewelry popularization, right? So it is unnatural. If you really don't know, ask him to bring you a quality certificate. Spending more money is not a bad thing. Don't worry.