In fact, if you don't know much about diamonds, it is more appropriate to buy them online in a physical store than online. On the one hand, it is cheaper (reducing the management fee of physical stores by about 2000-3000), and on the other hand, you can take a closer look at online feedback and user pictures to understand the product situation, at least better than listening to shopping guides in physical stores and knowing nothing. Pay attention to 4C indicators when buying diamonds: carat number, color grade, clarity and cut, all of which are necessary for preserving value.