Personally, I suggest the landlord buy a ring with 18K gold inlaid with broken diamonds. On the one hand, the texture of 18K gold is hard, and the inlaid diamonds are not easy to fall off. On the other hand, broken diamonds are very cheap, mainly because of the process cost. In fact, if you buy it online, as far as Taobao is concerned, you can choose a store with consumer protection, which is more secure. Jewelry must be accompanied by a jewelry appraisal certificate. As far as diamonds are concerned, it is generally a national inspection and geological university certificate in China. Small broken diamonds are all from Geological University, because they can't meet the requirements of national inspection. After receiving the goods, you can take them to relevant local units for verification or online inquiry. If there are fakes, you can apply for a refund. Of course, my side is diamond jewelry, and our website is a small shop opened by the company's own factory on Taobao. If the landlord is trustworthy, he can visit our shop and look at diamond jewelry.