If you want to buy loose diamonds, it is more cost-effective. A physical store that specializes in selling diamonds and jewelry will make a relative comparison with the market, and it will not sell too high or too low, and it will have certain service guarantee. Buying loose diamonds online will be relatively cheap, but you need to pay attention to the authenticity. After purchase, you can find a professional organization to identify. There are also many loose diamonds for sale in the second-hand market, and the price is relatively low, but we should carefully distinguish the authenticity and beware of being deceived. Buying a loose diamond requires careful consideration of your own needs and budget, and choosing the diamond that suits you. At the same time, you should know the relevant knowledge and precautions before buying to avoid being deceived.