In fact, jewelry is worthless if it is pure gold, and worthless if it is 18k gold. Ruby is thousands more expensive than the red one sold in China. This is not unusual, just like jade is more transparent and greener, and the price is tens of thousands. Traveling and shopping abroad, you can't take the old concept of domestic tourism, and you are always worried about buying fakes. At least in regular shops abroad, you won't buy fakes. As for the price, some can be compared, and some have no basis for comparison. Buying it is the most important thing. Never spend money with the mentality that you can do great things.